[Botany • 2026] Sonerila plenasicola (Melastomataceae: Sonerileae) • A New Species from Central Vietnam, with Nomenclatural Notes including A New Combination, S. strigosa, and the resurrection of S. yunnanensis

 

Sonerila plenasicola 

in Hsu, Do, Truong, Hoang et Lin, 2026. 

DOI: doi.org/10.11646/phytotaxa.781.2.1

facebook.com/Darthvaderiana

 

Abstract

A new species, Sonerila plenasicola, is described from Quang Tri Province in Central Vietnam. The new species shares several morphological similarities with S. yunnanensis but differs in having leaves covered with curved strigose hairs, suprabasal acrodromous or subpinnate venation, peduncles lacking gland-tipped hispid hairs, and anthers 2.5–3 mm long. Furthermore, after detailed comparisons of type materials and additional specimens, we re-evaluated the taxonomic status of Sonerila cantonensis var. strigosa and S. yunnanensis, two names long treated as synonyms of S. cantonensis in previous studies. Based on their consistent differences in leaf morphology, indumentum, and floral structure, the former is now elevated to species rank, namely S. strigosa, a new record for the flora of Vietnam, and the latter is resurrected. We also provide updated descriptions, information on distribution, ecology and phenology, conservation status, typification notes, and a diagnostic comparison among the related taxa.

Eudicots, endemism, Flora of Vietnam, new taxon, nomenclature, plant taxonomy, Sonerileae

Sonerila plenasicola

 

TIAN-CHUAN HSU, TRUONG VAN DO, QUANG TRUNG TRUONG, HAI NAM HOANG and CHE-WEI LIN. 2026. Sonerila plenasicola (Melastomataceae, Sonerileae), A New Species from Central Vietnam, with Nomenclatural Notes including A New Combination, S. strigosa, and the resurrection of S. yunnanensis.  Phytotaxa. 781(2); 101-115. DOI: doi.org/10.11646/phytotaxa.781.2.1

[2026-10-21] 

facebook.com/Darthvaderiana/posts/10234854260761135

 

[Botany • 2026] Eriocaulon meghalayense (Eriocaulaceae) • A New Species from Northeast India, the First Report of a cormous Eriocaulon from India

Eriocaulon meghalayense V.Parveen & Nampy,

in Parveen, Nampy, Mumthas, Vaishnavi, Balakrishnan et Arshad, 2026. 

DOI: doi.org/10.11646/phytotaxa.763.3.7

 

Abstract  

A new species, Eriocaulon meghalayense V.Parveen & Nampy, is described from the East Khasi Hills, Meghalaya, Northeast India. It is most similar to E. cherrapunjianum but differs in possessing a distinct corm and other traits. It also resembles the cormous species E. cormosum and E. xenopodion, yet can be distinguished by its scapes and seed characteristics. A detailed description, photographs, scanning electron micrographs of the seeds, and a comparison of the key diagnostic characters with allied species are provided. The species is known only from a single locality and is provisionally assessed as Data Deficient (DD).

Monocots, East Khasi Hills, Eriocaulon cherrapunjianum, Eriocaulon meghalayense, geophyte, Meghalaya

VAHIDHA PARVEEN A., SANTHOSH NAMPY, LULU MUMTHAS V.K., VAISHNAVI K.P., ARCHANA BALAKRISHNAN and ARSHAD K. 2026. A New Species of Eriocaulon (Eriocaulaceae) from Northeast India, the First Report of a cormous Eriocaulon from India.  Phytotaxa. 763(3); 283-291. DOI: doi.org/10.11646/phytotaxa.763.3.7 [2026-06-24]

[Botany • 2026] Impatiens zayuensis (Balsaminaceae) • A New Species from southeastern Xizang, China

 

 Impatiens zayuensis  S.Peng, G.W.Hu & Q.F.Wang, 

in Yuan, T. Hu, Zhang, Cao, Du, Chen, Cong, G.-W. Hu, Peng et Wang, 2026. 

DOI: doi.org/10.11646/phytotaxa.751.2.7

  Researchgate.net/publication/403820090 

english.CAS.cn

Abstract

Impatiens zayuensis (Balsaminaceae), from Cibagou National Nature Reserve in southeastern Xizang, China, is described. Based on molecular evidence, I. zayuensis is assigned to I. sect. Racemosae. Morphologically, it is close to I. margaritifera and I. casseabriae in having spurless flowers, but differs in upper stem with glands, ovate lateral sepals, dentate margin of lateral sepals, sub-dolabriform or oblong lower petal, and oblique mouth of lower sepal. Phylogenetically, the new species does not cluster with the other two similar spurless species, indicating that the spurless character may have evolved several times within the I. sect. Racemosae.

Impatiens, New Species, Taxonomy, Phylogeny, Xizang, Eudicots

 Impatiens zayuensis.
 A. habitat; B. inflorescence; C-D. front view of flower; E-F. lateral view of flower; G. dissected flower (a. dorsal petal; b. lateral sepals; c. lateral united petals; d. lower sepal; e. stamens and pedicel); H. capsule and fruit stalk. I. seeds; J. leaves; K. root (Image by YUAN Taohua)

Morphological comparison of Impatiens zayuensis (A1-I1) and I. margaritifera (A2-I2).
A. inflorescences; B. the upper part of the stems (showing glands); C. leaves (showing glands at the base of the leaf blade); D. front view of flowers; E. lateral view of flowers; F. lateral sepals; G. dorsal petals; H. lateral united petals; I. lower sepals

 (1-I1 photographed by YUAN Taohua; B2-E2 by HUANG Wen; F2-I2 by PENG Shuai)

Impatiens zayuensis S.Peng, G.W.Hu & Q.F.Wang

TAO-HUA YUAN, TIAN HU, BEI ZHANG, MING CAO, ZHI DU, XIANG-YUN CHEN, YI-YAN CONG, GUANG-WAN HU, SHUAI PENG and QING-FENG WANG. 2026. A New Species of Impatiens (Balsaminaceae) from southeastern Xizang, China.  Phytotaxa. 751(2); 163-175. DOI: doi.org/10.11646/phytotaxa.751.2.7 [2026-04-15] 

Researchgate.net/publication/403820090_A_new_species_of_Impatiens_from_Tibet

 english.CAS.cn/newsroom/research-news/202605/t20260507_1158557.shtml

[Botany • 2025] Polystichum ensiforme (Dryopteridaceae, sect. Cyrtomiopsis) • A New simple-lamina Species from Lingnan Region, China

 

[A-C] Polystichum ensiforme H.Shang & R.H.Jiang;  
[D-F] P. basipinnatum (Baker) Ching

 [A & D] Habit, [B & E] Portion of frond, [C & F] Portion of lamina showing sori

in Shang, J.-L. Li, Z.-Y. Li, SHAO, F.-H. Li, D. Li, Liu et Jiang, 2025. 

剑叶鞭叶耳蕨  |  DOI: doi.org/10.11646/phytotaxa.704.2.5  

 Researchgate.net/publication/392468740

 (photos: Z. Y. Li; W. Q. Wang; X. L. Zhou & K. Ye). 

Abstract

Polystichum ensiforme, a new polystichoid fern species from Guangxi Zhuang Autonomous Region, China, is described and illustrated. Morphologically, the new species most closely resembles P. basipinnatum but differs in having a generally simple lamina, scattered sori, and leathery lamina texture. Phylogenetic analysis placed it as an isolated clade within P. sect. Cyrtomiopsis. A key to the species of P. sect. Cyrtomiopsis is also provided.

Cyrtomidictyum, fern, phylogeny, taxonomy, whip-like leaves, Pteridophytes

Morphological comparison between Polystichum ensiforme (top) and P. basipinnatum (bottom): A. & D. Habit, B. & E.Portion of frond, C. & F. Portion of lamina showing sori

 (photo credits: A & C by Z. Y. Li; B by W. Q. Wang; D by X. L. Zhou; E &F by K. Ye). 

Polystichum ensiforme H.Shang & R.H.Jiang, sp. nov.

Etymology:—The species epithet is derived from the Latin, ensiform (sword-shaped), referring to sword-shaped fronds of the new species.

Vernacular name:—剑叶鞭叶耳蕨(jiàn yè biān yè ěr jué)

HUI SHANG, JIAN-LING LI, ZHONG-YANG LI, WEN SHAO, FANG-HUA LI, DONG LI, HONG-MEI LIU and RI-HONG JIANG. 2025. A New simple-lamina Species of Polystichum (Dryopteridaceae) from Lingnan Region, China.  Phytotaxa. 704(2); 178-186. DOI: doi.org/10.11646/phytotaxa.704.2.5 [2025-06-06] 

 Researchgate.net/publication/392468740_A_new_species_of_Polystichum_from_Lingnan_China

New sword-shaped fern species found in Guangxi

http://english.xtbg.cas.cn/rh/rp/202506/t20250616_1045654.html

[Botany • 2025] Polystichum cretaceum (Dryopteridaceae, sect. Cyrtogonellum) • A New fern from Guangxi, China

Polystichum cretaceum Xiaohua Chen & Y.F.Gu,  

 

in X.-H. Chen, Shu, Xu, Liu, L.-J. Chen, He, Zheng et Gu, 2025. 

白垩柳叶耳蕨 | DOI: doi.org/10.11646/phytotaxa.690.2.8  

 Researchgate.net/publication/389413725

Abstract

Polystichum (Dryopteridaceae) is a cosmopolitan fern genus known for its rich species diversity, with its primary diversity center in eastern Asia. In this study, we describe a novel species, Polystichum cretaceum, discovered in Napo County, Baise City, Guangxi Zhuang Autonomous Region, China. This species is distinguished by its dwarf habit, fronds simple or 1-pinnate (pinnae 2–4 pairs), pilose or glabrous surface, and fenestrate perispores. This new species resembles P. fraxinellum but differs by having oval pinnae with entire margins and free veins, while P. fraxinellum has ovate-lanceolate pinnae with slightly recurved margins and anastomosing veins. Phylogenetic analysis suggests a close relationship between P. cretaceum and P. minimum. However, P. minimum differs in having obliquely ovate lateral pinnae with shallowly incised-toothed margins and acuminate apices.

new taxon, Cyrtogonellum, ferns, species diversity, Pteridophytes, rbcL gene, chloroplast genome

Polystichum cretaceum Xiaohua Chen & Y.F.Gu sp. nov.

Etymology:—The specific epithet “cretaceum” is derived from the habitat of this newly identified species, which thrives on moist, chalky soil slopes.

Vernacular name:—白垩柳叶耳蕨 (bai e liu ye er jue) 

 

XIAO-HUA CHEN, JIANG-PING SHU, YI-DA XU, HONG-MEI LIU, LI-JUN CHEN, JIAO HE, XI-LONG ZHENG and YU-FENG GU. 2025. Polystichum cretaceum (Polystichum sect. Cyrtogonellum, Dryopteridaceae), A New fern from Guangxi, China.  Phytotaxa. 690(2); 276-284. DOI: doi.org/10.11646/phytotaxa.690.2.8 [2025-02-28]  

 Researchgate.net/publication/389413725_Polystichum_cretaceum_a_new_fern_from_Guangxi_China

[Botany • 2026] Mitreola luongii (Loganiaceae) • A New Species from Limestone Hill in northern Vietnam

Mitreola luongii  Moriwak., Tagane & V.S.Dang,

in Moriwak, Tagane, Pham, Souladeth, Vongthavone, Kongxaisavath, Phonepaseuth, Naito, Yamazaki, Lenh et Dang, 2026. 

Tiểu mạo Vương Đình Lương  ||  DOI: doi.org/10.11646/phytotaxa.776.2.3 

Abstract

A new species of Mitreola (Loganiaceae), M. luongii, is described from limestone area in Tuyen Quang Province, northern Vietnam. Morphologically, it is most similar to M. crystallina, but can be distinguished by its shrub habit, up to 1 m tall (vs. herb, up to 60 cm tall), having terminal and axillary inflorescences (vs. terminal), shorter internode 1.5–5.5 cm long (vs. 6–8 cm long), shorter peduncles 0.5–1.5 cm long (vs. ca. 6 cm long), smaller leaf size 5.5–10.5 × 2–4.5 cm (vs. 15–20 × 5–7 cm) and longer corolla tube 4–4.5 mm long (vs. 4 mm long).

Eudicots, Du Gia National Park, Flora, Gentianales, hornpods, Indochina, taxonomy

Mitreola luongii.
 A. Habit, B–C. Flowering branches, D. Abaxial leaf surface, E. Terminal and axillary inflorescences, F. Corolla, front view, G. Corolla, lateral view, H. Partly dissected flower, showing stamens, style and stigma. I. Opened corolla, showing inner hairs and stamens, J. Pistil.

Photos: A by Quoc Trong Pham, B & E by Phetlasy Souladeth, C, D, F–J by Shuichiro Tagane.

Mitreola luongii Moriwak., Tagane & V.S.Dang, sp. nov.  

Diagnosis:—Mitreola luongii is most similar to M. crystallina of China in having light-purple corollas, but can be readily distinguished by its shrub habit, up to 1 m tall (vs. herb, up to 60 cm tall), terminal and axillary inflorescences (vs. terminal), shorter internode 1.5–5.5 cm long (vs. 6–8 cm long), shorter peduncles 0.5–1.5 cm long (vs. ca. 6 cm long), smaller leaf size 5.5–10.5 × 2–4.5 cm (vs. 15–20 × 5–7 cm) and longer corolla tube 4–4.5 mm long (vs. 4 mm long). (Table 1). 

...

Etymology:—The species epithet honors Mr. Vuong Dinh Luong, director of Du Gia National Park, who has made significant contributions to biodiversity conservation in the park. 

Vernacular name:—Tiểu mạo Vương Đình Lương

Hiroki MORIWAKI, Shuichiro TAGANE, Quoc-Trong PHAM, Phetlasy SOULADETH, Thyraphon VONGTHAVONE, Deuanta KONGXAISAVATH, Phongphayboun PHONEPASEUTH, Hanaka NAITO, Kaito YAMAZAKI, Thanh Thuong LENH and Van-Son DANG. 2026. Mitreola luongii (Loganiaceae), A New Species from Limestone Hill in northern Vietnam. Phytotaxa. 776(2); 166-172. DOI: doi.org/10.11646/phytotaxa.776.2.3 [2026-09-24]

[Fungi • 2026] Akanthomyces infaproensis (Hypocreales: Cordycipitaceae) • A New entomopathogenic Fungus from Sabah, Malaysian Borneo

Akanthomyces infaproensis  Shahbaz & J.S. Sathiya Seelan, 

in Shahbaz, Cheak, Wasti, Wai et Seelan, 2026.

DOI: doi.org/10.11646/phytotaxa.772.2.1  

 sabaes.sabah.gov.my

Abstract

Akanthomyces Lebert belongs to the family Cordycipitaceae (Hypocreales, Sordariomycetes), which is regarded as one of the most important groups of entomopathogenic fungi (EPF). Despite the high fungal diversity in Sabah, Malaysia, the systematics and phylogeny of Akanthomyces in this region is still lacking. This study aimed to characterize entomopathogenic fungal specimens collected from Sabah using morphological and molecular phylogenetic approaches to determine their taxonomic status. During surveys of entomopathogenic fungi, two specimens infecting lepidopteran host were collected and examined using morphological characterization and molecular phylogenetic analyses. Five genetic markers, including the internal transcribed spacer (ITS) region, small subunit ribosomal RNA (SSU), translation elongation factor 1-alpha (TEF1-α), RNA polymerase II largest subunit (RPB1), and RNA polymerase II second largest subunit (RPB2), were amplified and sequenced to infer phylogenetic relationships. Phylogenetic analyses were conducted using Maximum Likelihood (ML) and Bayesian Inference (BI) based on individual and concatenated datasets (ITS–SSU–TEF1-α-RPB1–RPB2). The analyses consistently recovered the Bornean isolates as a distinct, well-supported lineage. Morphologically, the isolates are distinguished by robust, cream to pale-yellow branched synnemata, smaller perithecia, larger ellipsoidal conidia and filiform, multiseptate ascospores that disarticulate at maturity into cylindrical to slightly barrel-shaped part-spores at maturity compared with closely related species. Based on the combined morphological and phylogenetic evidence, Akanthomyces infaproensis sp. nov. is described from Sabah, Malaysia. The discovery of this new species expands the known diversity of Akanthomyces and highlights the tropical rainforests of Sabah as reservoirs of undescribed fungal diversity.

Fungi, Lepidoptera, molecular phylogeny, Sabah, taxonomy, new taxa

Akanthomyces infaproensis on adult moth

Akanthomyces infaproensis Shahbaz & J.S. Sathiya Seelan sp. nov.

MUHAMMAD SHAHBAZ, CHONG CHUAN CHEAK, IBRAHEM GHANI WASTI, YAP SAU WAI and JAYA SEELAN SATHIYA SEELAN. 2026. Akanthomyces infaproensis sp. nov. (Cordycipitaceae, Hypocreales), A New entomopathogenic Fungus from Sabah, Malaysian Borneo.  Phytotaxa. 772(2); 101-120. DOI: doi.org/10.11646/phytotaxa.772.2.1 [2026-08-28] 

 sabaes.sabah.gov.my/resource/research-publication/36

[Botany • 2026] Gastrodia keyiensis (Orchidaceae: Gastrodieae) • A New holomycotrophic Species from Arunachal Pradesh, Eastern Himalaya, India

  

Gastrodia keyiensis M.Khanal, D.Borah & Dev.Kumar, 

in Khanal, Borah, Sarkar, Gap, Rai et Kumar, 2026.

DOI: doi.org/10.11646/phytotaxa.773.3.7  

 facebook.com/DipuBORAH2

Abstract

Gastrodia keyiensis M.Khanal, D.Borah & Dev.Kumar sp. nov. is described from Keyi Panyor District, Arunachal Pradesh, northeastern India. The new species is morphologically allied to G. putaoensis but differs in having a broadly obovate basal part of the labellum with 6–7 prominent longitudinally thickened structures, and a distinct, thick, strongly incurved, narrowly oblong-ligulate, yellow apical part that is minutely papillate, with the apex rounded to obtuse (vs. an elliptic basal part with 3–5 parallel thickened lines, and a narrower apical part densely covered with yellow hairs, with the apex obtuse and densely covered with red papillae). A detailed morphological description, diagnosis, photographic illustrations, notes on distribution, habitat, phenology, and conservation status, together with comparisons with morphologically allied species, are provided to facilitate its identification.

Monocots, Ghost orchid, Mycoheterotroph, New to Science, Orchid, Taxonomy

Gastrodia keyiensis M.Khanal, D.Borah & Dev.Kumar sp. nov.

MADHUSUDHAN KHANAL, DIPANKAR BORAH, SHUVADIP SARKAR, NEELAM GAP, SANTOSH KUMAR RAI and DEVENDRA KUMAR. 2026. Gastrodia keyiensis (Orchidaceae: Gastrodieae), A New holomycotrophic Species from Arunachal Pradesh, Eastern Himalaya, India.  Phytotaxa. 773(3); 289-295. DOI: doi.org/10.11646/phytotaxa.773.3.7 [2026-09-09]

  facebook.com/DipuBORAH2/posts/28179222161743622

[Botany • 2026] Leucheria melorum (Asteraceae: Nassauvieae) • A New Species from the Patagonian Andes

 

Leucheria melorum Horton & Picca, 

in Horton & Picca, 2026.

DOI: doi.org/10.11646/phytotaxa.774.3.4 

 

Abstract

A new species of Leucheria endemic to the Patagonian Andes in northern Neuquén, Argentina, is reported. Leucheria melorum is characterized by its cushion-like growth habit composed of dense woolly rosettes, rhizomes covered by persistent old leaves, and capitula with white to pink flower corollas. The species inhabits high-elevation volcanic environments (2550–2900 m a.s.l.) on the Domuyo and the Wayle massifs. We provide a detailed morphological description, illustrations highlighting the diagnostic morphological traits and a key for distinguishing L. melorum from related species. Based on the IUCN criteria and categories, a preliminary conservation status assessment is also given.

 Eudicots, Flora Altoandina, Leucheria, Nassauvieae, Patagonia

A. General view of the habitat of Leucheria melorum on Cerro Wayle at 2900 m a.s.l. with the Volcán Tromen in the background; B. Several dense rosettes; C. Rosette with capitula at different developmental stages; D. Close-up view of some flowering capitula; E. Fruit; F. Photomicrograph of the cypsela surface showing characteristic twin trichomes (indicated by white arrows) and biseriate glandular trichomes (indicated by black arrows).

Photos A, C, E & F: Pablo Picca; B & D: J. Felipe Horton.

Leucheria melorum.
A. Habit; B. Leaf, adaxial view; C. Scape and capitulum; D. Inner phyllary, dorsal view; E. Outer phyllary, dorsal view; F. Bract-like phyllary, dorsal view; G. Flower; H. Flower (ovary and pappus removed); I. Stamens; J. Fruit.

Line drawings by Angélica Marino.

Leucheria melorum Horton & Picca, sp. nov. 

Diagnosis:—Leucheria melorum is morphologically similar to L. candidissima and L. millefolium, which are also present in the northern Neuquén volcanic massifs. However, the new species is readily distinguished by its compact, cushion-like growth habit. It further differs from both by having very short stems (vs. more or less elongated in L. candidissima and L. millefolium), flabelliform leaf blades (vs. lanceolate in L. candidissima and elliptic in L. millefolium) and by having bi- or tri-pinnatisect leaves with oblong segments closely approximated towards the apex (vs. pinnatisect with an elongate terminal lobe in L. candidissima and bi- or tri-pinnatisect with rhomboidal segments in L. millefolium; segments regularly distributed along the rachis in both species).

Etymology:—The specific epithet honors Mabel and Sergio MELO, a couple of dedicated naturalists, who were the first people to collect specimens of this new species. Their keen observations of the high Andean flora and kind cooperation were very important to the recognition of this novelty.

Juan Felipe HORTON and Pablo I. PICCA. 2026. A New Species of Leucheria (Nassauvieae, Asteraceae) from the Patagonian Andes.  Phytotaxa. 774(3); 241-251. DOI: doi.org/10.11646/phytotaxa.774.3.4 [2026-09-17]

[Botany • 2026] Begonia trichopetiolata (Begoniaceae, sect. Baryandra) • A New Species from Bukidnon, Central Mindanao, the Philippines

 

Begonia trichopetiolata  Medecilo, Rubite & Caballes, 

in Medecilo-Guiang, Rubite, Vallejos, Atay et Caballes, 2026. 

DOI: doi.org/10.11646/phytotaxa.773.2.5  

 facebook.com: Ken Bien Mar CABALLES

Illustrated by Julieferd Torres facebook.com: Ferd Torres

 Researchgate.net/publication/414085231

Abstract

Begonia trichopetiolata from Bukidnon, Central Mindanao, is described and illustrated as a new species endemic to the Philippines. It closely resembles B. mabuhayensis from Surigao del Sur, Eastern Mindanao; however, it differs in having triangular, keeled stipules, densely villose petioles, leaves with 10 primary veins and non-repand margin, shorter inflorescences and primary peduncles, larger bracts, and smaller capsules. Following IUCN Red List criteria, we propose B. trichopetiolata as Critically Endangered (CR). This discovery raises the total number of Begonia species in Bukidnon to 14 and marks the third member of Begonia section Baryandra recorded in the province.

Eudicots, Critically endangered, karst forest, limestone, Mindanao, Philippine endemic

Begonia trichopetiolata.
A. Habit; B. Detail of petiole; C. Leaf abaxial surface; D. Staminate flower bud; E. Staminate flowerfront view; F. Staminate flower lateral view; G. Stamens; H. Anther and filament; I. Pistillate flower front view; J. Pistillate flower lateralview; K. Stigma and style; L. Lateral view of the stipule; M. Anterior view of the stipule; N. Cross section of the ovary; O. Capsule.

Illustrated by Julieferd Torres. 

Begonia trichopetiolata Medecilo, Rubite & Caballes sp. nov. 

§ Baryandra

Etymology:—The specific epithet trichopetiolata refers to the petioles entirely and densely covered with long white hairs.

Maria Melanie P. MEDECILO-GUIANG, Rosario R. RUBITE, Christian Jay S. VALLEJOS, Jasten Kerk A. ATAY and Ken Bien Mar L. CABALLES. 2026. Begonia trichopetiolata (section Baryandra, Begoniaceae), A New Species from Bukidnon, Central Mindanao, the Philippines.  Phytotaxa. 773(2); 162-170. DOI: doi.org/10.11646/phytotaxa.773.2.5 [2026-09-08]

 facebook.com/kenbienmar.potato/posts/28547966154832893

 facebook.com/ferdtorresssss/posts/28045322301814879

 Researchgate.net/publication/414085231_Begonia_trichopetiolata_a_new_species_from_Central_Mindanao_the_Philippines

[Botany • 2026] Melastoma dinagatense (Melastomataceae) • A New ultramafic-obligate, microendemic Species from Dinagat Island, Philippines

 

Melastoma dinagatense

in Caylan, Medecilo-Guiang, Fritsch, Amoroso et Penneys, 2026.

DOI: doi.org/10.11646/phytotaxa.766.3.6  

 facebook.com/GrisielouCAYLAN

Abstract

Melastoma dinagatense (Melastomataceae) from Dinagat Island, Caraga Region, Philippines, is here described and illustrated. The species is most similar to the widespread M. malabathricum but differs in its longer pedicels, larger hypanthium and calyx lobes, longer hypanthium scales, and a distinctive leaf indumentum composed of elongated crystalliferous cells with a branched base and emergent hairs, as well as leaf margins with spreading pilose-ciliate hairs. The new species is known only from the ultramafic elfin forest on Mount Redondo and is assessed as Critically Endangered. A dichotomous key to the Philippine species of Melastoma is provided.

Eudicots, endangered, endemic, Mindanao, morphology, ultramafic flora

 

GRISIELOU L. CAYLAN, MARIA MELANIE P. MEDECILO-GUIANG, PETER W. FRITSCH, VICTOR B. AMOROSO and DARIN S. PENNEYS. 2026. Melastoma dinagatense (Melastomataceae): A New ultramafic-obligate, microendemic Species from Dinagat Island, Philippines.  Phytotaxa. 766(3); 281-290. DOI: doi.org/10.11646/phytotaxa.766.3.6 [2026-07-14]

 facebook.com/61560779536251/posts/122221884854359317

 facebook.com/GrisielouCAYLAN/posts/3308757025966094

[Botany • 2025] Dalechampia nivea (Euphorbiaceae) • A New Species from Brazil

Dalechampia nivea  Brigato & O.L.M.Silva, 

in Brigato, Carnriro-Torres, Cordeiro et da Silva, 2025. 

DOI: doi.org/10.11646/phytotaxa.701.3.5 

Researchgate.net/publication/391875236

Abstract

We describe Dalechampia nivea, a new species from high-altitude regions (700–1,190 m) within the rainforests of the Atlantic Forest domain. This species has been recorded in the states of Bahia, Espírito Santo, and Minas Gerais in eastern Brazil. Dalechampia nivea shares morphological similarities with D. pentaphylla, including leaves with five leaflets and pistillate flower calyx with six entire sepals. However, it can be distinguished by the 3-lobed involucral bracts with entire to serrated margins, lanceolate to ovate bracteal stipules, and tomentose ovary. In contrast, D. pentaphylla has 5-partite involucral bracts with lacerate margins, broadly ovate to reniform bracteal stipules, and pilose to pubescent ovary. This article includes detailed photographs, distribution maps, comments on the habitat, and a preliminary assessment of the species’ conservation status. An identification key for the Brazilian Dalechampia vines with compound or palmatisect leaves divided into five partitions is also provided.

Acalyphoideae, Bahia, Dalechampia sect. Dioscoreifoliae, Taxonomy, Eudicots

LUIZA OLIVEIRA BRIGATO, DANIELA SANTOS CARNEIRO-TORRES, INÊS CORDEIRO and OTÁVIO LUIS MARQUES DA SILVA. 2025. Dalechampia nivea (Euphorbiaceae), A New Species from Brazil.  Phytotaxa. 701(3); 271-278. DOI: doi.org/10.11646/phytotaxa.701.3.5 [2025-05-20]

 Researchgate.net/publication/391875236_Dalechampia_nivea_a_new_species_from_Brazil

[Botany • 2021] Camellia proensis (Theaceae) • A New Species from Southern Vietnam

Camellia proensis  V.D.Luong, Doudkin & V.H.Quach,

in Hoi, Dung, Doudkin, Averyanov, Thinh, Lieu et  Truong, 2021.

DOI: doi.org/10.11646/phytotaxa.479.1.12

Abstract

A new species of the genus Camellia L. (Theaceae) from Southern Vietnam is described and illustrated under the name Camellia proensis. Morphological differences between C. proensis and closely related species in the genus Camellia L. (sect. Piquetia) were identified. C. proensis is easily distinguishable from C. honbaensis, C. piquetiana and C. longii by the yellow flowers; from C. dalatensis by the glabrous twigs and leaves; from C. dongnaiensis by light yellow flowers; from C. sonthaiensis by mature fruit flat-globose, 4.0–5.5 cm tall and 8.5–10.0 cm wide. Ecological environment and distribution were also provided for this new species. The images and type specimens of this species were processed and stored in Vietnam (holotype, isotypes, DLU).

Keywords: Camellia proensis, Lam Dong, taxonomy, Theaceae, Vietnam, Magnoliids

Camellia proensis.
A. Leaf. B. Venation of leaf (adaxial surface). C. Venation of leaf (abaxial surface). D. Flower bud. E, F. Flower. G. Sepals. H. Petals. I. Stamens. K. Styles and gynoecium. L. Fruit. M. Seed.

Drwaing by Luong Van Dung.

Camellia proensis.
A, B. Young twig. C, E. Flowering shoot and arrangement of petals. D. Open flower. F, G. Fruits. H. Seeds.

Photos by Quach Van Hoi.

Camellia proensis V.D.Luong, Doudkin & V.H.Quach, sp. nov.  

Affinity:—Camellia proensisis morphologically similar to C. sonthaiensis in glabrous young branches and leaves; sepals 5, hairy on the outside; petal light yellow, hairy on the outside, from which it is distinguished by the size of mature fruit, 3.0–3.5 cm in diameter, 1.5–2.0 cm deep (C. sonthaiensis), 4.0–5.5 cm tall, 8.5–10.0 cm wide (C. proensis). 

 Etymology:—The species is named after the location where the authors first found this plant. Pro is the name of Pro commune, Don Duong District, Lam Dong Province, Vietnam.

Quach Van Hoi, Luong Van Dung, Roman V. Doudkin, Leonid V. Averyanov, Bui Bao Thinh, Nguyen Thi Lieu and Luu Hong Truong. 2021. Camellia proensis (Theaceae, sect. Piquetia), A New Species from Southern Vietnam. Phytotaxa. 479(1); 137–141. DOI: doi.org/10.11646/phytotaxa.479.1.12

[Botany • 2022] Eriocaulon pandeyana (Eriocaulaceae) • A New Species from southern Western Ghats, India

 

Eriocaulon pandeyana Nampy, Harishma & Vishnu,  

in Harishma, Mohan et Nampy, 2022.

DOI: doi.org/10.11646/phytotaxa.539.3.6 

Researchgate.net/publication/359299628

Abstract  

Eriocaulon pandeyana from the Idukki district in Kerala is here described as a new species of Eriocaulaceae. It closely resembles E. ramnadense but is distinct by having oblong-lanceolate, lobed, acute, hyaline involucral bracts, oblanceolate, acuminate floral bracts, 3 sub-equal male petals, 3 unequal, slightly hoary female sepals and yellow, elliptic seeds with transversely elongated or isodiametric seed coat cells. The differences between the other similar species are also discussed. Since adequate data on abundance and distribution are lacking, the new species is provisionally listed under the category Data Deficient (DD) as per IUCN Red List Categories and Criteria.

Keywords: Monocots, Data Deficient, Eriocaulon quinquangulare, Eriocaulon truncatum, Idukki district, Koymanchola

Eriocaulon pandeyana Nampy, Harishma & Vishnu sp. nov.

Kuttukaran Haridasan HARISHMA, Vishnu MOHAN and Santhosh NAMPY. 2022. Eriocaulon pandeyana (Eriocaulaceae), A New Species from southern Western Ghats, India.  Phytotaxa. 539(3); 273-279. DOI: doi.org/10.11646/phytotaxa.539.3.6

 Researchgate.net/publication/359299628_Eriocaulon_pandeyana_a_new_species_from_southern_Western_Ghats_India

[Botany • 2026] Rubus kashmiricus (Rosaceae) • A New Species from Kashmir Himalaya, India

 

Rubus kashmiricus   

in Sofi, Khuroo, Lateef, Moochi et Wani, 2026. 

 DOI: doi.org/10.11646/phytotaxa.770.1.2 

  x.com/Khuroo_Kashmir

 

Abstract

Rubus kashmiricus (Rosaceae), is described here as a new species from the Kashmir Himalaya, India. The species is distinct from its closely allied species R. niveus in possessing pedately-pinnate leaves on primocanes, 7–9-foliate with an obovate terminal leaflet, inflorescence paniculiform, flower larger (13–20 mm diam.), sepals reflexed at or after anthesis, petals spreading and non-overlapping, nearly equal in length to the sepals, stamens shorter than petals as well as carpels, ovary glabrous with a few hairs only at apex and fruit comprising 1–4 drupelets. Detailed photographic illustrations and comparison of its diagnostic characters with the allied taxa are provided to aid accurate identification.

Eudicots, Rosales, Species discovery, Systematic, Taxonomy

  

SAMEER A. SOFI, ANZAR AHMAD KHUROO, SHAGUFTA LATEEF, SHAKIR A. MOOCHI, AIJAZ A. WANI. 2026. Rubus kashmiricus (Rosaceae), A New Species from Kashmir Himalaya, India.  Phytotaxa. 770(1); 20-28. DOI: doi.org/10.11646/phytotaxa.770.1.2 [2026-08-14] 

 x.com/Khuroo_Kashmir/status/2088089468213530826