[Botany • 2026] Reinstatement of Meiogyne monogyna (Annonaceae) and A Key to the Species of Meiogyne in China

 

Meiogyne monogyna (Merr.) Bân, 

in Yang, Wang, Lai et Tan, 2026.

 DOI: doi.org/10.11646/phytotaxa.767.1.5  

english.CAS.cn 

Abstract

Meiogyne monogyna (Merr.) Bân was previously treated as conspecific with the widespread M. virgata (Blume) Miq. and was synonymized under the latter. However, based on detailed examinations of herbarium specimens and field observations of living plants, we confirm that M. monogyna is a morphologically distinct species. Consequently, we reinstate its species status and document it as a new record for the flora of China, providing a comprehensive taxonomic description and including it in an updated identification key for all three species of Meiogyne recorded in China.

Magnoliids, Meiogyne virgata, morphology, synonym, taxonomy, type, Yunnan

Meiogyne monogyna (Merr.) Bân

BIN YANG, WEN-GUANG WANG, HAN LAI, JIN-GUO ZHANG, YAN-MEI PING and YUN-HONG TAN. 2026. Reinstatement of Meiogyne monogyna (Annonaceae) and A Key to the Species of Meiogyne in China including a new record.  Phytotaxa. 767(1); 45-53. DOI: doi.org/10.11646/phytotaxa.767.1.5 [2026-07-16]

Meiogyne monogyna Reinstated as A Distinct Species and Newly Recorded in China

https://english.CAS.cn/newsroom/research-news/202607/t20260727_1179205.shtml

[Botany • 2024] Meiogyne konkakinhensis (Annonaceae) • A New Species from the central highlands of Vietnam

 

Meiogyne konkakinhensis B.H.Quang & Tagane,

in Quang, Tagane, Nagahama, Fujiwara, Yoneoka, Binh et Oguri, 2024. 

DOI: 10.11646/phytotaxa.652.1.7

Meiogyne Miquel (1865: 12; Annonaceae), with 33–39 species, are trees or shrubs characterised by distinctive corrugated grooved structure at the base of the adaxial surface of the inner petals, axillary or sometimes cauliflorous flowers and oblong multi-seeded indehiscent monocarps (van Heusden 1994, Johnson et al. 2019, Jaikhamseub et al. 2022). The species are collectively distributed in southern India, southern Central China, Southeast Asia, Australia, Melanesia and western Polynesia (van Heusden 1994, Thomas et al. 2012, POWO 2024). In Vietnam, six species of Meiogyne are known (Bân 2000, Jaikhamseub et al. 2022): M. monogyna (Merrill 1942: 163) Bân (1974: 1778), M. subsessilis (Ast 1938: 90) Sinclair (1956: 14), M. hainanensis (Merrill 1925: 131) Bân (1973: 1148), M. rubra Jaikhamseub, Damth. & Chaowasku in Jaikhamseub et al. (2022: 223), M. virgata (Blume 1825: 14) Miquel (1865: 12) and M. vietnamica Jaikhamseub, T.A.Le & Chaowasku in Jaikhamseub et al. (2022: 225), although Jaikhamseub et al. (2022) excluded M. virgata because they could not confirm any Vietnamese specimens. 

During our botanical expedition in Kon Ka Kinh National Park, Gia Lai Province, Central Highland, Vietnam, in 2022, we encountered an unknown species of Meiogyne in primary broad-leaved evergreen forests. After a careful examination of the literature of the genus in Vietnam and surrounding countries (Ast 1938, Bân 2000, van Heusden 1994, Johnson et al. 2019, Jaikhamseub et al. 2022) and herbarium specimens including digitised images from FOF, FU, HN, K, KAG, MAK, P and VNM, we concluded that it was an undescribed species, and we here describe it as new to science.

Flora, Indochina, endemic species, Magnoliales, taxonomy, plant diversity, Magnoliids

Meiogyne konkakinhensis.
A. Flowering branch, view from underneath. B. Flowering branch after anthesis. C. Flower, front view. D. Flower after anthesis, side view. E, F. Fruiting branches, with one monocarp.

Photos of Oguri et al. Q362 when it was alive, taken by B.H. Quang.

Meiogyne konkakinhensis.
 A. Flowers, front view, at early stage of anthesis (left), late stage of anthesis (right). B. Outer petals, adaxial (right) and abaxial (left) surfaces. C. Inner petals, adaxial (left) and abaxial (right). D. Flower, bottom view. E. Flower with petals removed showing sepals, stamens and stigmas. F. Sepals, abaxial (left) and adaxial (right) sides. G. Stamens, carpels. H. Stamens. I. Carpels.

Photos of Oguri et al. Q362 when it was alive, taken by B.H. Quang.

Meiogyne konkakinhensis B.H.Quang & Tagane, sp. nov. 

The new species is similar to Meiogyne rubra in its relatively small leaf size and reddish purple petals at maturity, but it is easily distinguished by yellowish brown hairy midrib on the adaxial surface of lamina (glabrous in M. rubra), smaller petals (outer petals 8.0–18.0 × 5.0–8.0 mm, inner petals 7.0–16.0 × 3.1–7.0 mm vs. 30.0–33.0 × 7.5–10.0 mm and 26.5–30.5 × 7.0–8.0 mm), and fewer and smaller stamens (76–80, 1.0–1.4 mm long vs. ca. 118, 1.5–2.2 mm long), fewer carpels (7–9 vs. 10–11) and more ovules per ovary (7–8 vs. 4).

Etymology:—Named for the Kon Ka Kinh National Park.  

Vernacular name:—Thiểu nhụy kon ka kinh (Vietnamese).

Bui Hong Quang, Shuichiro Tagane, Ai Nagahama, Tao Fujiwara, Katsuhiro Yoneoka, Tran Duc Binh and Emiko Oguri. 2024. Meiogyne konkakinhensis (Annonaceae), A New Species from the central highlands of Vietnam.  Phytotaxa. 652(1); 78-82. DOI: 10.11646/phytotaxa.652.1.7

[Botany • 2026] Mitrephora rashmiae (Annonaceae) • A New Species from Indian Himalaya, representing the first record of andromonoecy for the genus

 

Mitrephora rashmiae

in Page, Kishwan et Thackeray. 2026. 

DOI: doi.org/10.1002/fedr.70134 

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ABSTRACT

A new species of Mitrephora is described from Arunachal Pradesh, India. It can be distinguished from its congeners based on a combination of morphological characters such as evergreen leaf phenology, unbranched inflorescences with up to 8 flowers, inner petals being subequal or equal in length relative to the outer petals and stipitate, beaked, cylindric monocarps. This species is unique in the shape and geometry of the miter (dome) which is longer than broad (length: diameter ratio 1.25). This species is also the only andromonoecious species known in the genus to date. This discovery represents only the second record of the genus from the Himalayan Biodiversity Hotspot.

Keywords: Arunachal Pradesh, Malmeoideae, Miliuseae, staminate flower

Mitrephora rashmiae

 

Navendu V. Page, Shivam Kishwan and Tejas U. Thackeray. 2026. A New Species of Mitrephora (Annonaceae) from Indian Himalaya, representing the first record of andromonoecy for the genus. Feddes Repertorium. e70134. DOI: doi.org/10.1002/fedr.70134 [07 July 2026] 

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[Botany • 2026] Goniothalamus metadoxus & Uvaria chrysoflora • Two New Species of Annonaceae from Papua New Guinea

Goniothalamus metadoxus Ezedin;
Uvaria chrysoflora Ezedin

in Ezedin. 2026.

DOI: doi.org/10.15553/c2026v811a6

 Abstract 

Two new species of Annonaceae bearing unique or unusual morphologies are described and illustrated from Papua New Guinea. Goniothalamus metadoxus Ezedin, from the Papuan Peninsula, exhibits an extraordinary reduction of the outer petals resulting in an inverted floral morphology where the inner petals appear larger and more prominent. It is further distinguished by its long pedicels, inner petals bearing a densely sericeous indument giving a silvery-white sheen, and long apiculate staminal connectives that are pinkish-lavender in color. Uvaria chrysoflora Ezedin, from the Sepik River basin, is unique in bearing greenish-yellow flowers, making it the first non-red flowered species of its genus from Papuasia. It most closely resembles the widespread U. concava Teijsm. & Binn. and can be further distinguished from the latter by its smaller leaves and larger flowers.

KEYWORDS: Annonaceae, Goniothalamus, New Guinea, new species, Uvaria

Goniothalamus metadoxus Ezedin
A, B: branch showing adaxial and abaxial laminas; C: cauliflorous inflorescence arising from excrescence on bole; D: close-up of a flower showing reflexed sepals and reduced outer petals; E: flower with one inner petal removed revealing inner chamber with pinkish-lavender colored stamens and light yellow carpels [Damas et al. SAJ1442] [Photos: S.A. James]

Goniothalamus metadoxus Ezedin, sp. nov. 

Diagnosis — Goniothalamus metadoxus resembles G. caloneurus Miq. in having similar leaf shape and siZe, oblong monocarps, and nearly subequal outer and inner petal siZes but differs in its habit being a small to medium tree up to 15 m tall (vs. shrub up to c. 4 m tall), laminas being chartaceous (vs. coriaceous), secondary veins not impressed above and not prominent below (vs. impressed above, prominent below), cauliflorous fasciculate inflorescences (vs. ramiflorous and solitary), inner petals being longer than the outer (vs. outer petals longer), and the petals silvery-white (vs. yellow-orange).

Etymology — From Greek meta, altered, and doxus, appearance; in reference to the inner petals being longer than the outer petals due to pronounced reduction of the latter.

Uvaria chrysoflora Ezedin
A: habit, twigs, mature and immature flowers; B: close-up of flower [Weiblen et al. GW2215] [Photos: G.D. Weiblen]

Uvaria chrysoflora Ezedin, sp. nov. 

Diagnosis — Uvaria chrysoflora resembles U. concava Teijsm. & Binn. in having subglabrous young stems and shortly pedunculate flowers with concave petals, but differs in its yellow-green petals (vs. maroon), petals not conspicuously incurved at apices (vs. strongly incurved), larger flowers measuring 35–50 mm across (vs. c. 18–30 mm), and smaller leaves measuring 10–12 × 5.5–6.5 cm (vs. c. 12–15 × 6–7 cm).

Etymology — From Greek chryso, golden, and Latin flora, flower; in reference to the yellowish-green flowers.

Zacky Ezedin. 2026. Two New Species of Annonaceae from Papua New Guinea. Candollea. 81(1); 51-55. DOI: doi.org/10.15553/c2026v811a6 (17 June 2026)

[Botany • 2026] Pseuduvaria sirindhorniana (Annonaceae) • Phylogenetic and Morphological Evidence supports the Recognition of A New Species from southern Thailand

Pseuduvaria sirindhorniana Yoosukkee, Damth. & Chaowasku, 

in Yoosukkee, Damthongdee, Aongyong, Baka, Sama-ae et Chaowasku, 2026. 

รุจิสิริน  ||  DOI: doi.org/10.3767/blumea.2026.70.03.02  

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Abstract

Based on the molecular phylogenetic analyses of six plastid DNA regions (matK and rbcL exons; trnL intron; atpB-rbcL, psbA-trnH and trnL-trnF intergenic spacers) and including 57 samples of Pseuduvaria, as well as thorough morphological studies, Pseuduvaria sirindhorniana (Annonaceae, Miliuseae) is described and illustrated here as a new species from Narathiwat, southern Thailand. The new species belongs to a major clade that also includes P. fragrans, P. gardneri, P. glossopetala, P. kwangtungensis, P. multiovulata and P. phuyensis. Pseuduvaria sirindhorniana is morphologically most similar to P. glossopetala, but differs by having basally connate (vs. free) sepals, larger petals, elliptic-ovate (vs. obovate) outer petals, inner petals that are only connivent at the apex (vs. connivent from the base to ± the midpoint and at the apex), with openings formed from the base (vs. openings formed from ± the midpoint). Pseuduvaria kwangtungensis turns out to be a putative sister of the new species, but the two are morphologically dissimilar in several traits, such as leaf base, inner petal appearance and glands on the inner side of the inner petals.

Keywords: Magnoliids; Malmeoideae; Miliuseae; Pseuduvaria; Systematics; Taxonomy; Thailand

Pseuduvaria sirindhorniana Yoosukkee, Damth. & Chaowasku.
 a. Inflorescences with flowers, from living material of Aongyong & Baka 55.
b. Infructescence with monocarps, from living material of Aongyong & Baka 56.

— Photographs by A. Baka.

 Holotype of Pseuduvaria sirindhorniana Yoosukkee, Damth. & Chaowasku (Aongyong & Baka 55, CMUB).

Pseuduvaria sirindhorniana Yoosukkee, Damth. & Chaowasku sp. nov. 

 Pseuduvaria sirindhorniana differs from the morphologically most similar species, P. glossopetala, by having basally connate (vs. free) sepals, larger petals, elliptic-ovate (vs. obovate) outer petals, inner petals that are only connivent at the apex (vs. connivent at the apex and from the base to ± the midpoint), with openings formed from the base (vs. openings formed from ± the midpoint). 

Etymology — The specific epithet honours H.R.H. Princess Maha Chakri Sirindhorn of Thailand, who has continuously supported the study of plant taxonomy in Thailand and worldwide, on the auspicious occasion of her 72nd (6th cycle) birthday anniversary (2 April 2027). She has also been instrumental in establishing the Plant Genetic Conservation Project under the Royal Initiative (RSPG), which aims to train personnel and develop plant genetic resources for the conservation of plant diversity, with benefits extending to farmers and related sectors of the country.

Vernacular name — Ruchi Sirin (รุจิสิริน).

  C. Yoosukkee, Anissara Damthongdee, Kithisak Aongyong Chanthamrong, Abdulromea Baka, I. Sama-ae and Tanawat Chaowasku. 2026. Molecular Phylogenetic and Morphological Evidence supports the Recognition of Pseuduvaria sirindhorniana (Annonaceae), A New Species from southern Thailand.   Blumea - Biodiversity, Evolution and Biogeography of Plants. DOI: doi.org/10.3767/blumea.2026.70.03.02 [May 26, 2026]

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[Botany • 2025] Polyalthia acuminatissima & P. chiangmaica, P. miliusifolia ... (Annonaceae: Miliuseae) • Uncovering Five New Species of Polyalthia from Thailand: Molecular and Morphological Congruence

 

พงศ์พะงา Polyalthia acuminatissima Wiya, Damth. & Chaowasku; 
มธุรสา P. esanensis Wiya, Damth. & Chaowasku; 
บุษบาดง P. chiangmaica Wiya, Damth. & Chaowasku; 
ไพรผกา P. maxwelliana Wiya, Chanthamrong & Chaowasku;
พนาศัย P. miliusifolia Wiya, Chanthamrong & Chaowasku

in Wiya, Damthongdee, Chanthamrong, Ue-aree et Chaowasku, 2025. 

DOI: doi.org/10.5852/ejt.2025.1022.3093 

 facebook.com/ThaiBGO

Abstract 

Based on molecular phylogenetic analyses using seven plastid DNA markers (matK, rbcL, ndhF and ycf1 exons; trnL intron; psbA-trnH and trnL-trnF intergenic spacers) and detailed morphological investigations, five new species of Polyalthia Blume (Annonaceae Juss.) from Thailand are recognized, described and illustrated. These species are: Polyalthia acuminatissima Wiya, Damth. & Chaowasku sp. nov. (from Nakhon Phanom Province, northeastern region), P. esanensis Wiya, Damth. & Chaowasku sp. nov. (from eastern and northeastern regions), P. chiangmaica Wiya, Damth. & Chaowasku sp. nov. (from Chiang Mai Province, northern region), P. maxwelliana Wiya, Chanthamrong & Chaowasku sp. nov. and P. miliusifolia Wiya, Chanthamrong & Chaowasku sp. nov. (both from Kanchanaburi Province, southwestern region). All five species belong to one of the three major clades within the genus. Three of them (P. acuminatissima, P. esanensis and P. chiangmaica) were previously misidentified as P. evecta (Pierre) Finet & Gagnep., which is polyphyletic. Comparisons with their phylogenetically related or morphologically similar species are provided and a key to the species of this major clade occurring in Thailand is included. The conservation status of all five new species is provisionally assessed as Data Deficient. 

Keywords: Magnoliids, Malmeoideae, molecular phylogeny, systematics, taxonomy

 

Chattida Wiya, Anissara Damthongdee, Kithisak Chanthamrong, Phasit Ue-aree and Tanawat Chaowasku. 2025. Uncovering Five New Species of Polyalthia (Annonaceae, Miliuseae) from Thailand: Molecular and Morphological Congruence.  European Journal of Taxonomy. 1022(1), 243-276. DOI: doi.org/10.5852/ejt.2025.1022.3093 [2025-10-14]

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พืชชนิดใหม่ของโลกวงศ์กระดังงา 5 ชนิด จากประเทศไทย 

นักอนุกรมวิธานพืช องค์การสวนพฤกษศาสตร์ ร่วมค้นพบ

ดร.ฉัตรธิดา วิยา นักอนุกรมวิธานพืช องค์การสวนพฤกษศาสตร์ ร่วมกับทีมวิจัย นำโดย รองศาสตราจารย์ ดร.ธนวัฒน์ เชาวสกู ภาควิชาชีววิทยา คณะวิทยาศาสตร์ มหาวิทยาลัยเชียงใหม่  ดร.อานิสรา ดำทองดี นักวิจัยหลังปริญญาเอก นายกิติศักดิ์ ฌานธำรง นักวิจัยอิสระ และนายพสิษฐ์ เอื้ออารีย์ ผู้ช่วยนักวิจัย กรมอุทยานแห่งชาติ สัตว์ป่า และพันธุ์พืช ร่วมกันค้นพบพืชชนิดใหม่ของโลกในวงศ์กระดังงา (Annonaceae) สกุลกล้วยเต่า (𝙋𝙤𝙡𝙮𝙖𝙡𝙩𝙝𝙞𝙖 Blume) จำนวน 5 ชนิด คือ

มธุรสา (𝙋𝙤𝙡𝙮𝙖𝙡𝙩𝙝𝙞𝙖 𝙚𝙨𝙖𝙣𝙚𝙣𝙨𝙞𝙨 Wiya, Damth. & Chaowasku) เป็นไม้ต้นขนาดเล็ก สูงประมาณ 1.5 เมตร พบที่จังหวัดอำนาจเจริญและอุดรธานี คำระบุชนิดแสดงถึงแหล่งที่พบ คือภาคตะวันออกเฉียงเหนือ หรืออีสาน 

พนาศัย (𝙋𝙤𝙡𝙮𝙖𝙡𝙩𝙝𝙞𝙖 𝙢𝙞𝙡𝙞𝙪𝙨𝙞𝙛𝙤𝙡𝙞𝙖 Wiya, Chanthamrong & Chaowasku) เป็นไม้ต้นขนาดเล็ก สูงประมาณ 60 เซนติเมตร พบที่จังหวัดกาญจนบุรี คำระบุชนิดแสดงถึงลักษณะใบที่คล้ายกับใบของพืชในสกุลระฆังสยาม (Miliusa Lesch. ex A.DC.) บางชนิด

ไพรผกา (𝙋𝙤𝙡𝙮𝙖𝙡𝙩𝙝𝙞𝙖 𝙢𝙖𝙭𝙬𝙚𝙡𝙡𝙞𝙖𝙣𝙖 Wiya, Chanthamrong & Chaowasku) เป็นไม้ต้นขนาดเล็ก สูง 1.5–4 เมตร พบที่จังหวัดกาญจนบุรี คำระบุชนิดตั้งขึ้นเพื่อเป็นเกียรติแก่ Mr. James Franklin Maxwell (2488–2558) นักสำรวจและเก็บตัวอย่างพรรณไม้ไทยผู้มีผลงานโดดเด่น และเป็นหนึ่งในผู้ร่วมก่อตั้งหอพรรณไม้ภาควิชาชีววิทยา คณะวิทยาศาสตร์ มหาวิทยาลัยเชียงใหม่ (CMUB) พร้อมทั้งเป็นภัณฑารักษ์คนแรก

บุษบาดง (𝙋𝙤𝙡𝙮𝙖𝙡𝙩𝙝𝙞𝙖 𝙘𝙝𝙞𝙖𝙣𝙜𝙢𝙖𝙞𝙘𝙖 Wiya, Damth. & Chaowasku) เป็นไม้พุ่ม สูงประมาณ 6 เมตร พบที่จังหวัดเชียงใหม่ คำระบุชนิดแสดงถึงแหล่งที่พบ คือจังหวัดเชียงใหม่

พงศ์พะงา (𝙋𝙤𝙡𝙮𝙖𝙡𝙩𝙝𝙞𝙖 𝙖𝙘𝙪𝙢𝙞𝙣𝙖𝙩𝙞𝙨𝙨𝙞𝙢𝙖 Wiya, Damth. & Chaowasku) เป็นไม้ต้นขนาดเล็ก สูง 1–2 เมตร พบที่จังหวัดนครพนม คำระบุชนิดแสดงถึงลักษณะปลายใบที่มักจะเรียวแหลมและยืดยาวอย่างเด่นชัด

พืชชนิดใหม่ทั้ง 5 ชนิดนี้ มีลักษณะดอกที่คล้ายคลึงกัน จึงจำเป็นต้องใช้ข้อมูลลำดับเบสดีเอ็นเอเพื่อช่วยในการกำหนดขอบเขตชนิดและสถานะทางอนุกรมวิธาน อนึ่ง พบว่าต้นมธุรสา บุษบาดง และพงศ์พะงา เคยถูกระบุชนิดเป็น 𝙋𝙤𝙡𝙮𝙖𝙡𝙩𝙝𝙞𝙖 𝙚𝙫𝙚𝙘𝙩𝙖 (Pierre) Finet & Gagnep. แต่ข้อมูลสัณฐานวิทยาและวิวัฒนาการชาติพันธุ์เชิงโมเลกุลสามารถแยกพืชทั้ง 3 ชนิด และ 𝙋. 𝙚𝙫𝙚𝙘𝙩𝙖 ออกจากกันได้ ผลงานวิจัยนี้ได้ถูกตีพิมพ์ในวารสาร European Journal of Taxonomy เล่มที่ (Volume) 1022 หน้าที่ 243–276 (DOI: doi.org/10.5852/ejt.2025.1022.3093)

อย่างไรก็ตาม ข้อมูลด้านการกระจายพันธุ์และขนาดประชากรของพืชชนิดใหม่ทั้ง 5 ชนิดยังไม่เพียงพอต่อการประเมินสถานภาพการอนุรักษ์ ปัจจุบันองค์การสวนพฤกษศาสตร์ได้ดำเนินโครงการสำรวจภาคสนามเพื่อรวบรวมข้อมูลการกระจายพันธุ์และขนาดประชากรของพืชในสกุลกล้วยเต่าเพิ่มเติมเพื่อใช้ประเมินสถานภาพการอนุรักษ์เบื้องต้นและจัดลำดับความเร่งด่วนของพืชที่มีความเสี่ยงต่อการสูญพันธุ์ อันจะนำไปสู่การกำหนดแนวทางการอนุรักษ์ที่เหมาะสมต่อไป โดยโครงการดังกล่าวได้รับการสนับสนุนงบประมาณจากกองทุนส่งเสริมวิทยาศาสตร์ วิจัยและนวัตกรรม (กองทุน ววน.)

ในด้านการใช้ประโยชน์ พบว่า “มธุรสา” มีดอกที่มีกลิ่นหอมหวาน จึงมีศักยภาพในการพัฒนาเป็นไม้ดอกหอม นอกจากนี้ พืชทั้ง 5 ชนิด ยังมีแนวโน้มในการพัฒนาเป็นพืชสมุนไพร เนื่องจากมีรายงานการพบสารทุติยภูมิหลายกลุ่มที่แสดงฤทธิ์ทางเภสัชวิทยาในพืชสกุลนี้ ปัจจุบันนักอนุกรมวิธานพืชขององค์การสวนพฤกษศาสตร์ได้หารือร่วมกับอาจารย์และนักวิจัยจากมหาวิทยาลัยเชียงใหม่ ได้แก่ ภาควิชาเคมี และศูนย์วิจัยวิทยาศาสตร์สิ่งแวดล้อม คณะวิทยาศาสตร์ โดยมุ่งพัฒนาวิธีการสกัดสารจากพืชชนิดใหม่ให้มีประสิทธิภาพทั้งเชิงคุณภาพและปริมาณของสารสกัด พร้อมทั้งทดสอบคุณสมบัติทางกายภาพและชีวภาพ เพื่อยืนยันคุณสมบัติของสารที่ได้จากพืช อันจะนำไปสู่การสนับสนุนการใช้ประโยชน์จากพืชควบคู่กับการอนุรักษ์ความหลากหลายทางชีวภาพอย่างยั่งยืน

เขียนและเรียบเรียง: ฉัตรธิดา วิยา และคณะผู้วิจัย

[Botany • 2026] Meiogyne saundersii & M. stenophylla (Annonaceae) • Two New Meiogyne Species from Malesia and New Combinations in Meiogyne and Monoon in the Asia-Pacific Region

[C, D] Meiogyne stenophylla M.F.Liu & Munzinger flower and fruit,;
[E, F] Meiogyne wilsonii (Guillaumin) M.F.Liu & Munzinger flower and early developing fruit.
[A] Adaxial inner petal outgrowth of Meiogyne saundersii Junhao Chen & M.F.Liu;
[B] Adaxial inner petal outgrowth of M. cylindrocarpa (Burck) Heusden;

in Liu, Munzinger et Chen, 2026. 

 DOI: doi.org/10.3897/phytokeys.272.175385

Scale bars: 1 mm. Photos: A, B. J. Chen; C–F. J. Munzinger.

Abstract

Two new species of Meiogyne (Annonaceae) are described from Malesia based on morphological evidence and the results of a recent molecular phylogenetic study: Meiogyne saundersii from Peninsular Malaysia, Sumatra, and Borneo, and Meiogyne stenophylla from New Guinea. Meiogyne saundersii is morphologically similar to M. cylindrocarpa but differs in its leaf apex (abruptly caudate vs. acute, rarely shortly acuminate) and inner petal corrugation (tentacular vs. weakly longitudinally grooved). Meiogyne stenophylla is unique in the genus in its extremely narrow leaves (< 2 cm wide) with an attenuate apex; it is also similar to M. cylindrocarpa but differs in its lanceolate (vs. broadly ovate) petals and weakly warty (vs. weakly longitudinally grooved) outgrowth on the adaxial surface of the inner petals. In addition, two new combinations are proposed, Meiogyne wilsonii and Monoon papuanum, based on the results of the most recent molecular phylogeny of Meiogyne and related genera.

Key words: Annonaceae, Borneo, Meiogyne cylindrocarpa, New Guinea, Vanuatu

A. Adaxial inner petal outgrowth of Meiogyne saundersii Junhao Chen & M.F.Liu (C. Hansen 1511); B. Adaxial inner petal outgrowth of Meiogyne cylindrocarpa (Burck) Heusden (Thomas 3418);
C, D. Meiogyne stenophylla M.F.Liu & Munzinger (Munzinger et al. 6945) flower and fruit, reproduced from Munzinger et al. (2020);
E, F. Meiogyne wilsonii (Guillaumin) M.F.Liu & Munzinger (Munzinger et al. 3589) flower and early developing fruit. Scale bars: 1 mm. Photos: A, B. J. Chen; C–F. J. Munzinger.

Meiogyne saundersii Junhao Chen & M.F.Liu, sp. nov.

Meiogyne stenophylla M.F.Liu & Munzinger, sp. nov.

Meiogyne wilsonii (Guillaumin) M.F.Liu & Munzinger, comb. nov.

Monoon papuanum (I.M.Turner & Utteridge) M.F.Liu & Junhao Chen, comb. nov.

 Ming-Fai Liu, Jérôme Munzinger and Junhao Chen. 2026. Two New Meiogyne Species from Malesia and New Combinations in Meiogyne and Monoon (Annonaceae) in the Asia-Pacific Region. PhytoKeys. 272: 21-36. DOI: doi.org/10.3897/phytokeys.272.175385 [20 Mar. 2026]

 

[Botany • 2025] Miliusa beddomei (Annonaceae: Malmeoideae: Miliuseae) • An overlooked New Species of Miliusa from Western Ghats, India

Miliusa beddomei Sukdeb Bera, Sujana and Karthig., 

in Bera, Sujana et Kaliyamurthy. 2025. 

 DOI: doi.org/10.1002/njb.04906 

 Researchgate.net/publication/395178791 

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Abstract

Miliusa beddomei Sukdeb Bera, Sujana and Karthig. sp. nov., a previously overlooked species, is described here as a new species from the Western Ghats, India. It was first collected by Beddome in 1865 from Anamallays, Tamil Nadu, India but had been mistakenly identified as M. montana Gardner ex Hook.f. and Thomson. A comprehensive comparison of the morphological differences among M. beddomei and allied species is presented, emphasizing the unique characteristics that distinguish the species. Detailed description, illustration, photo plates, distribution map and ecological notes of the new species are provided. Miliusa beddomei is provisionally classified as ‘Endangered' (EN) under the IUCN criteria B2a, B2b(ii,iv), and C2a(i).

Keywords: Anamallays, Beddome, Kerala, Magnoliales, Nelliyampathy, Tamil Nadu

Miliusa beddomei Sukdeb Bera, Sujana and Karthig. sp. nov.

Sukdeb Bera, K. A. Sujana and Karthigeyan Kaliyamurthy. 2025. An overlooked New Species of Miliusa (Miliuseae: Malmeoideae: Annonaceae) from Western Ghats, India. Nordic Journal of Botany.  DOI: doi.org/10.1002/njb.04906 [01 September 2025]

 Researchgate.net/publication/395178791_new_species_of_Miliusa_from_Western_Ghats_India

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[Botany • 2025] Goniothalamus obovatus (Annonaceae) • A New Species from southern Thailand

 

Goniothalamus obovatus Chaowasku & Damth.,

 in Damthongdee, Narintarangkul Na Ayutthaya, Chanthamrong, Ruangritthidech, Wiya et Chaowasku, 2025. 

ปาหนันทุ่งหว้า || https://taiwania.ntu.edu.tw/abstract/2119

Abstract

Goniothalamus obovatus Chaowasku & Damth., a new species of Annonaceae from southern Thailand is described and illustrated. It is morphologically most similar to G. banii endemic to Vietnam, but can be distinguished from it by possessing terete (vs ± angular) branches, a subcordate to cordate (vs rounded) leaf base, shorter inner petals, an inner petal apex that is ± acute (vs long-acuminate), a lower ratio of inner petal to outer petal length, fewer stamens per flower, a staminal connective apex that is ± apiculate (vs rounded), fewer carpels per flower and densely hairy (vs glabrous) ovaries. The conservation status of the new species is provisionally assessed as Data Deficient.

Keyword: Annoninae, Goniothalamus, Goniothalamus banii, new species, Satun, taxonomy, Thailand

  

 Flowers and floral organs of Goniothalamus obovatus sp. nov.
 A. Flowers. B. Flower with one outer petal removed. C. Adaxial side of outer petal. D. Adaxial side of inner petal. E. Flower with petals removed. F. Flower with petals, stamens and carpels removed. G. Abaxial side of stamen. H. Carpel. All from the holotype (B–H from material in spirit).

 Holotype of Goniothalamus obovatus sp. nov. at CMUB.

Goniothalamus obovatus Chaowasku & Damth., sp. nov.

Diagnosis: The new species morphologically most similar to G. banii B.H.Quang, R.K.Choudhary & V.T.Chinh endemic to Vietnam (Quang et al., 2016) mainly in leaf, sepal and outer petal shape, as well as number of ovules per ovary, but distinguishable from it by having terete (vs ± angular) branches, a subcordate to cordate (vs rounded) leaf base, shorter inner petals, an inner petal apex that is ± acute (vs long-acuminate), a lower ratio of inner petal to outer petal length, fewer stamens per flower, a staminal connective apex that is ± apiculate (vs rounded), fewer carpels per flower and densely hairy (vs glabrous) ovaries (Table 1).

Etymology: The specific epithet refers to the obovate leaves of this species. 

Anissara Damthongdee, Pimjan Narintarangkul Na Ayutthaya, Kithisak Chanthamrong, Setthikij Ruangritthidech, Chattida Wiya and Tanawat Chaowasku. 2025. Goniothalamus obovatus (Annonaceae), A New Species from southern Thailand.  Taiwania. 70(4); 631-634. DOI: 10.6165/tai.2025.70.631 [04 September 2025] 

https://taiwania.ntu.edu.tw/abstract/2119

[Botany • 2025] Uvariopsis niangadoumae (Annonaceae) • Passion and Combat on a Floral Stage: A New Species from Monts de Cristal, Gabon, with Notes on its Unique Pollination Ecology

Uvariopsis niangadoumae  Couvreur & Dagallier,

in Couvreur, Niangadouma, Nguimbit, Paradis, Dagallier, Baudoin-Huit, Collin, Haran et Droissart, 2025. 

    DOI: doi.org/10.5091/plecevo.152843

Abstract

Background and aims – Gabon is a major centre of biodiversity. We describe a new species from the tropical plant family Annonaceae: Uvariopsis niangadoumae sp. nov., known from a single population in the Monts de Cristal National Park.

Material and methods – Field work was conducted to collect plant specimens and observe floral visitors. Pollen samples were collected and prepared for microscopic analysis. The phylogenetic tree of Uvariopsis was reconstructed using a maximum likelihood method and based on hundreds of nuclear markers. Pollination biology was studied using a DIY camera trap (PICT) placed near a female flower to record floral visitors and their behaviour for one full day. Several flower visitors were collected and identified using DNA barcoding.

Key results – Uvariopsis niangadoumae is a tree reaching five metres tall, characterized by strong-scented leaves, few-flowered cauliflorous foul-smelling flowers, and large pollen grains shed in tetrads. The species is endemic to a small area within the Monts de Cristal National Park. Phylogenetic analysis places U. niangadoumae within the “large-leaved clade” species complex with now five taxa. Pollination is diurnal, and the primary pollinator is a rove beetle (Staphylinidae), which uses the female flowers as a mating site, with males fighting for control of the flower. The rove beetles might be attracted by a chemical cue, the foul scent of the flowers, and visual cues, with the inner part of the petals resembling mushrooms.

Conclusion – These results emphasize once again the importance of the Monts de Cristal National Park for biodiversity and highlight conservation concerns for the newly described species. The new species is monitored regularly, especially for fruiting individuals, to support ex situ propagation. The Kinguélé Aval project maintains a conservation nursery with 56 species, including 20 individuals of this new species.

Keywords: camera trap, hydrological dam, IUCN conservation, plant-insect interactions, saprocantharophily, Staphylinidae

Uvariopsis niangadoumae, detail of male and female flowers. 

A. Detail of inner side of female (left) and male (right) flowers, one petal removed. B. Detail of female flower, one petal removed. C. Detail of inner side of one female petal. D. Old female flower. E. Detail of sepals on male flower. F. Young male flower, not at anthesis yet. 

From Couvreur 1803. Photos by Thomas L.P. Couvreur. Scale bars: A–D = 0.5 cm.

Uvariopsis niangadoumae, natural habit and vegetative characters.
A. Habitat along a small stream. B. General view. C. Young leaves, light green, dropping. D. Detail of adaxial side of leaf base. E. Detail of abaxial side of leaf base.

From Couvreur 1803. Photos by Thomas L.P. Couvreur.

Uvariopsis niangadoumae, detail of fruits and flower visitors.
A. One monocarp. B. Longitudinal section of a single monocarp showing the seeds. C. Male flower with small Diptera visitors. D. Female flower with one large Staphylinidae beetle. F. Upper side of male flower covered with Crematogaster sp. ants. F. Male flower with large Staphylinidae beetle emerging covered in pollen.

 From Couvreur 1803. Photos by Thomas L.P. Couvreur. Scale bars: A, B = 1 cm.

 Uvariopsis niangadoumae Couvreur & Dagallier, sp. nov.

 

Diagnosis: Uvariopsis niangadoumae resembles U. korupensis in the shape and dimensions of its leaves and the overall size of the flowers. It differs by having strong scented leaves versus no clear scent in U. korupensis. Furthermore, U. niangadoumae bears no more than two, few-flowered inflorescences on small protrusions at the base of the trunk, whereas in U. korupensis the base of the trunk is densely covered with inflorescences. Flowers of U. niangadoumae have free petals with a length:width ratio between 1.3 and 1.7 vs fused at base and a l:w ratio between 2.2 and 7 in U. korupensis. Uvariopsis niangadoumae also has fewer carpels than U. korupensis (20–25 vs 25–120).

Etymology: This species is dedicated to the Gabonese botanist Raoul Niangadouma who participated in the (long and arduous) botanical inventories that led to the official recognition of the Monts de Cristal National Park. Raoul Niangadouma is also one of the collectors of the type specimen of this species.

 Thomas L.P. Couvreur, Raoul Niangadouma, Igor Nguimbit, Anne-Hélène Paradis, Léo-Paul M.J. Dagallier, Lola Baudoin-Huit, Myriam Collin, Julien M. Haran and Vincent Droissart. 2025. Passion and Combat on a Floral Stage: A New Species of Uvariopsis (Annonaceae) from Monts de Cristal, Gabon, with Notes on its Unique Pollination Ecology. Plant Ecology and Evolution. 158(2): 294-308. DOI: doi.org/10.5091/plecevo.152843

[Botany • 2021] Pseuduvaria kwangtungensis (Annonaceae) • A Second Species of Pseuduvaria in China: The Identity of the Enigmatic Species Meiogyne kwangtungensis

 Pseuduvaria kwangtungensis (P.T.Li) Qing L.Wang & B.Xue,

in Q.L. Wang, Zhang, Shao, Z.-N. Wang et Xue, 2021.

DOI: 10.3897/phytokeys.172.61025

Photos: Q. L. Wang (A–I); B. Xue (J, K).

Abstract

Meiogyne kwangtungensis is a rare species endemic to Hainan, China, known just from two fruiting collections made in the 1930s. Although it was published under the name Meiogyne in 1976, it was suggested that it might be better placed within Pseuduvaria or Mitrephora. For decades, this species was never collected again, thus its true generic affinity remained unresolved due to the lack of flowers. During a field exploration in Hainan, we re-discovered this species and collected a flowering specimen for the first time. The flower immediately confirmed its affinity with Pseuduvaria. Phylogenetic analyses of five chloroplast regions (psbA-trnH, trnL-F, matK, rbcL, and atpB-rbcL; ca. 4.2 kb, 70 accessions) also unambiguously placed Meiogyne kwangtungensis in the Pseuduvaria clade (PP = 1.00, ML BS = 99%). Morphologically, it is most similar to P. multiovulata which is endemic to Myanmar and Thailand, both with often-paired flowers, long pedicels and short peduncles, and often 1–2 monocarps. However, it differs in having smaller flowers with kidney-shaped glands on the inner petals, fewer stamens and carpels, smaller ovoid monocarps with an apicule and fewer seeds. On the basis of the combined molecular phylogenetic and morphological data, we propose a new combination, Pseuduvaria kwangtungensis (P.T.Li) Qing L.Wang & B.Xue. A full description including floral characters and a color plate are provided here for this species. A key to species in the genus Pseuduvaria in China is also provided.

Keywords: Annonaceae, Meiogyne, molecular phylogeny, morphology, Pseuduvaria

 Morphology of Pseuduvaria kwangtungensis, comb. nov.
 A flowering branch B inflorescence C bottom view of a male flower D side view of a male flower E male flower, top view, inner petals manually separated to show adaxial inner petal surface with paired glands F a female flower G gynoecium of the female flower, showing three carpels and two staminodes (with black and white arrows) H fruits I inside of a monocarp, showing seeds in two series J Single dried seed, showing the grooved raphe K section of the seed, showing the spiniform endosperm rumination.

Photos: Q. L. Wang (A–I); B. Xue (J, K).

 Qing-Long Wang, Hui Zhang, Yun-Yun Shao, Zhu-Nian Wang and Bine Xue. 2021. A Second Species of Pseuduvaria in China: The Identity of the Enigmatic Species Meiogyne kwangtungensis. PhytoKeys. 172: 1-15. DOI: 10.3897/phytokeys.172.61025

[Botany • 2025] Artabotrys rubriflorus (Annonaceae) • A New Species from Yunnan China

Artabotrys rubriflorus  

in Liu, Ye, Li, Xiao et Hou, 2025. 

 DOI: doi.org/10.1111/njb.04680 

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Abstract

Artabotrys rubriflorus sp. nov. is described as a new species of Annonaceae, collected from Malipo, Yunnan province, China. It can be distinguished from the other nine species of Artabotrys by its red petals and stamens, as well as its reduced number of carpels per flower (7–9), fewer monocarps per fruit (4), and the presence of 1–2 seeds within each monocarp. The specimens of this new species were gathered through fieldwork and were subsequently subjected to rigorous analysis using both classical taxonomical methods and molecular phylogenetic analysis. The phylogenetic reconstruction, based on four chloroplast DNA regions (matK, rbcL, trnLF and psbAtrnH), was carried out employing maximum parsimony, maximum likelihood and Bayesian inference approaches. These analyses confirmed the systematic positioning of Artabotrys rubriflorus sp. nov. within the genus Artabotrys, while also establishing its distinctiveness from other species. Additionally, a comprehensive and detailed description of the new species, along with a key for identification, is provided.

Keywords: Artabotrys, China, molecular phylogeny, new species, taxonomy, Yunnan

Artabotrys rubriflorus sp. nov. 

Yunqian Liu, Wen Ye, Yuwen Li, Bo Xiao and Xueliang Hou. 2025. Artabotrys rubriflorus (Annonaceae), A New Species from Yunnan China. Nordic Journal of Botany. DOI: doi.org/10.1111/njb.04680  [19 March 2025]

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