[Botany • 2026] Begonia thanhquyetii (Begoniaceae, sect. Petermannia) • A New Species from Quang Tri province, Central Vietnam

Begonia thanhquyetii  C.H. Nguyen, T.A. Le & C.W. Lin,

in Duong, C. H. Nguyen, Le, Bui, Dinh, Dang, Y. T. Nguyen, Tran, T. H. Nguyen, Averyanov et Lin, 2026.

DOI: doi.org/10.11646/phytotaxa.762.2.8 

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Abstract

Begonia thanhquyetii, a new species from central Vietnam, is herein described and illustrated. It is morphologically most similar to B. baik in its creeping habit, rugose ovate leaves, and protogynous inflorescences. However, it differs in several key morphological characters, including stipules hirsute on the abaxial surface (vs. glabrous), bracts lacking glandular hairs along the margins (vs. glandular-ciliate), a pair of bracteoles present near the apex of the pistillate pedicel (vs. bracteoles absent), abaxial tepals of both staminate and pistillate flowers hirsute (vs. glabrous), and densely hirsute ovary (vs. glabrous). Following the IUCN Red List Categories and Criteria (Version 16), B. thanhquyetii is provisionally assessed as Least Concern (LC), pending further field surveys to clarify its distribution and population status.

Eudicots, biodiversity, endemism, Flora of Vietnam, Indochina, taxonomy

Begonia thanhquyetii sp. nov.

 

NAM VAN DUONG, CUONG HUU NGUYEN, ANH TUAN LE, DOI THE BUI, DIEN DINH, HA VAN DANG, YEN THI NGUYEN, HUNG THE TRAN, TUAN HOANG NGUYEN, LEONID V. AVERYANOV and CHE WEI LIN. 2026. Begonia thanhquyetii (B. sect. Petermannia, Begoniaceae), A New Species from Quang Tri province, Central Vietnam.  Phytotaxa. 762(2); 177-184. DOI: doi.org/10.11646/phytotaxa.762.2.8 [2026-06-16] 

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[Botany • 2025] Newmania bambusifolia (Zingiberaceae: Zingiberoideae) • A New Species from Hon Ba Nature Reserve, southern Vietnam

 

Newmania bambusifolia Škorničk., Vuong & Bao, 

in Truong, Q.B. Nguyen, Q.C. Nguyen et Leong-Škorničková, 2025. 

Gardens’ Bulletin Singapore. 77(1);   

ABSTRACT    

 Newmania bambusifolia Škorničk., Vuong & Bao (Zingiberaceae:

Zingiberoideae), a new ginger species discovered in Hon Ba Nature Reserve, Khanh Hoa

Province in southern Vietnam is described and illustrated here with notes on distribution,

ecology, phenology, preliminary IUCN assessment, and etymology. It is distinct from all

known congeners by the very narrow leaf-blades, resembling those of bamboos. This discovery

increases the total number of species in Newmania to seven. We include an updated key to the

genus accommodating this novelty.

Keywords. Eastern Indochina, gingers, Khanh Hoa Province, Vulnerable, Zingibereae

Newmania bambusifolia Škorničk., Vuong & Bao in situ at Hon Ba Nature Reserve.
From the type, Truong et al. BV 1774. (Photo: B.V. Truong)

Newmania bambusifolia Škorničk., Vuong & Bao. 
A. Habit (inset: detail of cross-section of rhizome). Scale bar: 30 cm. B. Leaf blades from various parts of the leafy shoot (from the left: distal, middle part of pseudostem (two blades), basal). C. Pseudostem showing ligules, pulvinate petioles and bases of leaf blades. D, E. Detail of leaf sheaths and ligules. F. Rhizome with an inflorescence.

All from the type, Truong et al. BV 1774. (Photos: B.V. Truong)

Newmania bambusifolia Škorničk., Vuong & Bao.   
A. Distal part of the flower in different views. B. Details of stamen and stigma (left: entire stamen in adaxial view; top right: anther with part of filament in abaxial and lateral views; bottom right: details of stigma). C. Flower with bract, pedicel and part of rachis, and dissection below (from left: bract, bracteole, calyx, dorsal corolla lobe in abaxial view, lateral corolla lobes (one in adaxial and one in abaxial view), staminodes (one in abaxial and one in adaxial view), and labellum. Tweezers seen across the labellum were used to flatten it.

 All from the type, Truong et al. BV 1774. (Photos: B.V. Truong)

Newmania bambusifolia Škorničk., Vuong & Bao, sp. nov. 

Unique in the genus by its prominently narrow, bamboo-like leaf-blades and dark purple labellum with overlapping lobes. Flowers are most similar to Newmania cristata by the yellow to greenish floral tube and filament, but differ by having a small anther crest less than 1 mm long with entire rounded apex (vs anther crest 4.6–5 mm long with a bilobed apex).

Etymology. The specific epithet refers to the unusually narrow, bamboo-like leaf blades.  

Truong, B.V., Nguyen, Q.B., Nguyen, Q.C. & Leong-Škorničková, J. 2025. Newmania bambusifolia (Zingiberaceae: Zingiberoideae), A New Species from Hon Ba Nature Reserve, southern Vietnam. Gardens’ Bulletin Singapore. 77(1); 113 - 120.

[Botany • 2026] Lasianthus sondangii (Rubiaceae) • A New Species with a unique spiciform inflorescence from Central Vietnam

Lasianthus sondangii Bao, Vuong & V.C.Nguyen, 

in Tran, V. C. Nguyen, Luong, Phan-Thi, H. T. Nguyen, Truong et Q. B. Nguyen, 2026. 

taiwania.ntu.edu.tw/abstract/2193

Abstract

Lasianthus sondangii, a new species from Lasianthus section Nudiflorae, is described from Khanh Hoa Province, Central Vietnam. It can be distinguished from other Lasianthus species in Vietnam and surrounding countries by having narrowly triangular stipules, spiciform inflorescences with two or three reduced cyme secondary axes, purple flowers, and clavate calyx lobes with revolute margins. A detailed description of the new species, color plates, distribution, habitat and preliminary conservation assessment are provided.

Keyword: Indochina, Khanh Hoa, Lasiantheae, plant conservation, plant diversity, sect. Nudiflorae

Lasianthus sondangii Bao, Vuong & V.C.Nguyen.
A. A flowering and fruiting branch. B. Apical shoot showing young leaves and stipule. C. Inflorescence and infructescence. D. Infructescence (side view) E. Flowers buds (mature (left) and immature (right)). F. Open flower in different views (side view (left) and top view (right)). G. Corolla artificially cut open, showing hairs at the throat and stamens. H. Flower with the corolla removed to show the ovary, calyx, style, and stigma (left) and longitudinal section that shows the calyx lobes, and the ovule (right). I. Mature fruit (left) and the cross section of fruit shows pyrenes and albumen of seeds (right).

Drawn by Phan Thi Thanh Nha from type QB137.

Lasianthus sondangii Bao, Vuong & V.C.Nguyen.
A. Habit and habitat. B. A flowering and fruiting branch. C. Apical shoot showing young leaves and stipule. D. Stipule. E. Leaves (adaxial surface (left) and abaxial surface (right)). F. Infructescence. G. Inflorescences. H. Inflorescence bearing open flowers.

(A, B, E–H by Nguyen Van Canh; C, D by Nguyen Quoc Bao from type QB137).

Lasianthus sondangii Bao, Vuong & V.C.Nguyen, sp. nov. 

Diagnosis: The new species is distinct from other Lasianthus species in Vietnam and Indo-China by its spiciform, sympodial, reduced-cymose inflorescence; purple flowers (including calyx), calyx lobes obovate with revolute margins.

Thi Thuy Nhan Tran, Van Canh Nguyen, Van Dung Luong, Thanh Nha Phan-Thi, Hoa Thi Nguyen, Ba Vuong Truong and Quoc Bao Nguyen. 2026. Lasianthus sondangii (Rubiaceae, Lasianthus section Nudiflorae), A New Species with a unique spiciform inflorescence from Central Vietnam. Taiwania. 71(3); 488 - 494. DOI: 10.6165/tai.2026.71.488 [26 May 2026] 

 https://taiwania.ntu.edu.tw/abstract/2193

[Botany • 2026] Begonia hanhhoae (Begoniaceae, sect. Jackia) • A New Species from the South Central Coast region, Vietnam

 

Begonia hanhhoae  C.W.Lin, V.C.Nguyen, Vuong & Aver.,

in Tran, V. C. Nguyen, T. H. Nguyen, Averyanov, Truong, Q. B. Nguyen, V. K. Nguyen et Lin, 2026.

DOI: doi.org/10.11646/phytotaxa.752.3.5 

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Abstract 

Begonia hanhhoae, a new species from Khanh Hoa Province, Ninh Hoa District, South Central Coast region, Vietnam, is described and illustrated. It resembles B. aspersa from northern Vietnam but differs in having broadly ovate to suborbicular leaves (vs. reniform) with a slightly waxy adaxial surface (vs. velvety), inflorescence with up to 13 flowers (vs. up to 5), actinomorphic androecium (vs. zygomorphic), and pistillate flowers that are subsessile or borne on very short pedicels up to 1.5 mm long (vs. 4–12 mm). According to the IUCN criteria, it has been tentatively assessed as Endangered (EN).

biodiversity, plant conservation, endemism, Indochina, Khanh Hoa Province, taxonomy, Eudicots

THI THUY NHAN TRAN, VAN CANH NGUYEN, THI HOA NGUYEN, LEONID V. AVERYANOV, BA VUONG TRUONG, QUOC BAO NGUYEN, VAN KHUONG NGUYEN and CHE WEI LIN. 2026. Begonia hanhhoae (Sect. Jackia), A New Species of Begoniaceae from the South Central Coast region, Vietnam. Phytotaxa. 752(3); 228-234. DOI: doi.org/10.11646/phytotaxa.752.3.5 [2026-04-23]

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[Botany • 2026] Breynia phuongiana (Phyllanthaceae) • A New Species from the Central Highlands of Vietnam

Breynia phuongiana N.K.T. Tram, Vuong, Aver. & V.C. Nguyen, 

in V. C. Nguyen, Tran, Truong, Averyanov, T. H. Nguyen, Phan-Thi et Tram, 2026. 

DOI: doi.org/10.1002/njb.05025

 

Abstract

A new species, Breynia phuongiana (Phyllanthaceae subgen. Sauropus), is described and illustrated from the Central Highlands of Vietnam. It is morphologically similar to B. beillei, B. bonii, and B. thorelii, but differs in having oblong-elliptic leaves, sepals marked with reddish striations, an androphore exceeding 1 mm in length, and distinctly hexagonal, starfish-shaped fruits with erect and persistent stigmas. A detailed morphological comparison with related species is provided. A preliminary conservation assessment categorizes it as ‘Data Deficient' (DD) based on IUCN Red List criteria.

Keywords: Breynia, Flora of Vietnam, plant diversity, plant endemism, taxonomy

Breynia phuongiana N.K.T. Tram, Vuong, Aver. & V.C. Nguyen
(A) A plant with inflorescences and infructescences, (B) stipules, (C) leaf from different views: adaxial (upper), abaxial (lower), (D) staminate flower from different views, (E) pistillate flower from different views, (F) inflorescences and infructescences, (G) fruit, (H) open fruit and seeds.

Drawing from type specimens by Thanh Nha Phan-Thi.

Breynia phuongiana N.K.T. Tram, Vuong, Aver. & V.C. Nguyen
(A) Flowering plant in its habitat, (B) inflorescence, (C–D) a staminate flower, (E) flowers from different views; a pistillate flower (left) and a staminate flower (right), (F) fruit with erect stigmas.

All photos from holotype specimen AL2456 by Van Canh Nguyen, correction and design by Ba Vuong Truong.

Breynia phuongiana N.K.T. Tram, Vuong, Aver. & V.C. Nguyen
(A) Leaves and branches, (B) inflorescences, (C) stipules, (D) portion of inflorescence, (E) staminate flower from different views: (1–4) adaxial surface, (5) abaxial surface, (F) pistillate flower from different views, (G) longitudinal section through the pistil and pedicel.

All from holotype specimen AL2456 by Van Canh Nguyen, correction and design by Ba Vuong Truong.

Breynia phuongiana N.K.T. Tram, Vuong, Aver. & V.C. Nguyen sp. nov.  

Diagnosis: The species is characterized by a combination of the following features: cauliflorous inflorescences and infructescences arising near the ground, sepals with reddish striations, an androphore more than 1 mm long, and distinctly hexagonal, starfish-shaped fruits with erect and persistent stigmas.

Etymology: The species name honours Ms. Ha Thi Phuong (Hà Thị Phương), who first discovered the species.

 

Van Canh Nguyen, Thi Thuy Nhan Tran, Ba Vuong Truong, Leonid V. Averyanov, Thi Hoa Nguyen, Thanh Nha Phan-Thi and Nguyen-Khanh-Trinh Tram. 2026. Breynia phuongiana (Phyllanthaceae), A New Species from the Central Highlands of Vietnam. Nordic Journal of Botany. DOI: doi.org/10.1002/njb.05025 [21 March 2026]

[Botany • 2025] Bulbophyllum minhquanii (Orchidaceae: Epidendroideae) • Bulbophyllum sect. Racemosae in Vietnam with the Description of the New Species and the new national record, B. albidostylidium

Bulbophyllum minhquanii  Vuong, Q.T.Truong & Aver.⁣, 

in Huynh, Averyanov, Maisak, Q. B. Nguyen, V. C. Nguyen, Dang, T. G. Nguyen, Q. T. Truong et B. V. Truong, 2025. 

DOI: doi.org/10.11646/phytotaxa.736.1.2 

facebook.com: Nguyễn Văn Cảnh

Abstract

The paper provides a taxonomic assessment of Bulbophyllum section Racemosae in Vietnam, accompanied by an identification key for all species currently recognized in the country. Information on type specimens, distribution, habitat and phenology (when available), as well as relevant taxonomic notes are presented for each accepted species, accompanied by plates with analytical photos. Bulbophyllum minhquanii is described as new to science, and B. albidostylidium (identified earlier as B. putii) is reported as a new national record. In total, 14 species of B. sect. Racemosae, of which five are endemic, are documented for Vietnam based on previous and current studies. The occurrences of B. macrocoleum and B. morphologorum in Vietnam remain uncertain and require verification by additional collections.

Flora of Vietnam, Orchids, plant diversity, plant endemism, plant taxonomy, plant conservation, Monocots

Bulbophyllum minhquanii

HUU DUC HUYNH, LEONID V. AVERYANOV, TATIANA V. MAISAK, QUOC BAO NGUYEN, VAN CANH NGUYEN, VAN SON DANG, TRUONG GIANG NGUYEN, QUANG TAM TRUONG, BA VUONG TRUONG. 2025. Bulbophyllum sect. Racemosae (Orchidaceae) in Vietnam with the Description of the New Species, B. minhquanii and the new national record, B. albidostylidium.  Phytotaxa. 736(1); 12-32. DOI: doi.org/10.11646/phytotaxa.736.1.2 [2025-12-24] 

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[Botany • 2025] Hoya thuhae (Apocynaceae: Asclepiadoideae) • A New Species from central Vietnam and H. lobbii, new record for Vietnam

Hoya thuhae Aver., Vuong & V.C.Nguyen⁣, 

in Tran, V. C. Nguyen, Averyanov, Wook, Truong, V. K. Nguyen, Maisak et Shvanova, 2025.  

turczaninowia.asu.ru/article/view/18531 

facebook.com: Nguyễn Văn Cảnh

Abstract

A new species, Hoya thuhae (Apocynaceae, Asclepiadoideae), from lowland areas of central Vietnam, is described. It resembles H. kerrii but may be distinguished by its finely pubescent petioles, puberulous leaf blade, longer peduncle, longer pilose to strigose pedicels, different shape of the calyx lobes, and elliptic corolla segments with apices raised above the central portion. Additionally, H. lobbii, known earlier in NE India, Thailand, and Cambodia, is recorded for Vietnam at first. Data on the ecology, phenology, distribution, and conservation status for both species are provided, together with plates compiled from original color analytical photos.

Keywords: flora of Vietnam, Hoya kerrii, plant diversity, plant taxonomy

Thi T. N. Tran, Van C. Nguyen, Leonid V. Averyanov, Um S. Wook, Ba V. Truong, Van K. Nguyen, Tatyana V. Maisak and Valeria V. Shvanova. 2025. Hoya thuhae (Apocynaceae, Asclepiadoideae), A New Species and H. lobbii, new record for Vietnam.  Turczaninowia. 28(4); 144–150. DOI: 10.14258/turczaninowia.28.4.17 [2025-12-25] 

turczaninowia.asu.ru/article/view/18531 

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[Botany • 2025] Vanilla baosangii (Orchidaceae: Vanilloideae) • A New Species from the Central Highlands of southern Vietnam

 

Vanilla baosangii   

in Dang, Averyanov, Maisak, Tran, ... et B. V. Truong, 2025. 

DOI: doi.org/10.11646/phytotaxa.718.1.6  

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Abstract

Vanilla baosangii discovered in the Central Highlands of southern Vietnam (Don Duong District, Lam Dong Province), is described and illustrated. In floral morphology the new species is similar to Vanilla siamensis and V. tiendatii in having hairs on the apex of the epichile and hairy column. However, it differs from V. siamensis in fewer, but densely arranged, flattened, often forked hairs on median lip lobe, a verruculose surface between the hairy epichle and bunch of scales, two warty keels forming a groove inside the claw, lip side-lobes surface with four to five distinct verruculose lines, lateral wings of clinandrium prominent, semi-circular, and anther cap ca. 4 mm long, with 2 forward curved horns. From V. tiendatii the new species differs in having larger elliptic leaves 18–26 cm long, an inflorescence bearing up to 25 flowers, lip apex with a group of fat branched hairs 4–7 mm long, and column with dense long hairs at apex, much longer than those in the basal half. According to IUCN Red List Categories and Criteria V. baosangii is assessed as a Critically Endangered. An identification key to all species to Vanilla known in Vietnam is provided, based on recent taxonomic treatments.

Flora of Vietnam, Miguelia, Orchid, plant diversity, plant endemism, plant geography, plant taxonomy, Vanilloideae, Monocots

 

Vanilla baosangii sp. nov.

MINH QUAN DANG, LEONID V. AVERYANOV, TATIANA V. MAISAK, THI THUY NHAN TRAN, VAN CANH NGUYEN, VAN SON DANG, HUU DUC HUYNH, TRUONG GIANG NGUYEN, QUANG TAM TRUONG, BA VUONG TRUONG. 2025. Vanilla baosangii (Orchidaceae, Vanilloideae), A New Species from the Central Highlands of southern Vietnam.  Phytotaxa. 718(1); 59-66. DOI: doi.org/10.11646/phytotaxa.718.1.6 [2025-09-16]

 facebook.com/CanhOrchid/posts/10228672950431169

 facebook.com/SangLoc58/posts/31394524340192884

[Botany • 2024] Hoya sungwookii (Apocynaceae: Asclepiadoideae) • A New Species from southern Vietnam

Hoya sungwookii  Aver., Vuong, Nhan et V. C. Nguyen,

in Tran, V.C. Nguyen, Averyanov, Truong, Dang, V.K. Nguyen, Maisak, Q.B. Nguyen et Krupkina, 2024. 

turczaninowia.asu.ru/article/view/15065

Photos by Van Canh Nguyen and Ba Vuong Truong

Abstract

A new species, Hoya sungwookii, discovered in southern Vietnam near Nha Trang Town (Khanh Hoa Province) is described and illustrated. It belongs to the type section of the genus and is distinguished from the morphologically closest H. oblongacutifolia (= H. graveolens) in glabrous pedicels, smaller flower 1.1–1.4 cm across, greenish ciliate calyx, corolla abaxially light green, small green to dark green corona 4.5–5 mm in diameter, 1.6–1.8 mm tall, small, 2–2.2 mm long, corona segments, and short corona segment inner angle, not exceeding anthers. Additionally, data on ecology, phenology, distribution of newly described species are presented, as well as its evaluated conservation status and color illustrations. Taking into consideration our new data, the genus in Vietnam currently includes 45 species.

Keywords: Asclepioideae, Eastern Indochina, endemism, flora, Hoya oblongacutifolia, Hoya sect. Hoya, Khanh Hoa Province, plant conservation, plant diversity, plant taxonomy

Hoya sungwookii:
A – plant in natural habitat in locus classicus; B – fresh flattened flowering plant; C – flattened shoot of plant in cultivation; D – intact inflorescences; E – spotted and uniform green leaves, adaxial and abaxial side; F – separated inflorescence; G – separated flowers, side view; H – pedicels with calyx and ovary; I – calyx and ovary; J – flower, frontal view; K – corolla, view from below; L–N – corona, views from above, from side, and from below; O – sagittal section of corona and ovary.

Photos by Van Canh Nguyen and Ba Vuong Truong from plant used for the preparation of the holotype specimen VNM 00070356, photo correction and design by L. Averyanov and T. Maisak.

Hoya sungwookii Aver., Vuong, Nhan et V. C. Nguyen, sp. nov.  

Diagnosis. The new species is morphologically closest to Hoya oblongacutifolia, from which it differs in glabrous pedicels, smaller flower 1.1–1.4 cm across, greenish ciliate calyx, corolla abaxially light green, small green to dark green corona 4.5–5 mm in diameter, 1.6–1.8 mm tall, small corona segments, 2–2.2 mm long, and short corona segment inner angle, not exceeding anthers

Etymology. The species is named after Mr. Um Sung Wook, who first found this plant in nature and kindly shared his discovery for our study.

 

T. T. N. Tran, V. C. Nguyen, Leonid V. Averyanov, B. V. Truong, V. S. Dang, V. K. Nguyen, Tatyana V. Maisak, Q. B. Nguyen and Lyudmila I. Krupkina. 2024. New Species, Hoya sungwookii (Apocynaceae, Asclepiadoideae), from southern Vietnam. Turczaninowia. 27(1); 72-80. DOI: 10.14258/turczaninowia.27.1.10 http://turczaninowia.asu.ru/article/view/15065

 Researchgate.net/publication/381368990_Hoya_sungwookii_from_southern_Vietnam

[Botany • 2024] Psychotria phuquocensis (Rubiaceae: Psychotrieae) • A New Species from Phu Quoc National Park, southern Vietnam

Psychotria phuquocensis Bao, Vuong & V.S.Dang,  

 in Quach, Dang, V. N. Pham, Truong, N. M. T. Nguyen, Q. T. Pham et Q. B. Nguyen. 2024. 

  taiwania.ntu.edu.tw/abstract/2012

Abstract

Psychotria phuquocensis, a new species is described and illustrated from Phu Quoc National Park, Phu Quoc Island in southern Vietnam. It can be distinguished from other Psychotria species previously known in the region by its glabrous stems, triangular, ovate-triangular to ovate stipules, elliptic, lanceolate elliptic or narrowly elliptic oblong leaf blade with small domatia between midrib and basal secondary veins, cymose inflorescence, green flower, and elliptisoid fruits. The color photographs, phenology, distribution, habitat, and preliminary conservation assessment are provided for P. phuquocensis.

Keyword: Indochina, plant diversity, Psychotria aganosmifolia, Psychotria asiatica, Psychotria fluviatilis, Psychotrieae

Psychotria phuquocensis Bao, Vuong & V.S.Dang.
A. Fruiting branch. B. Shoot apex showing young leaves and stipule. C. Domatia between midrib and base of the secondary vein. D. Leaves (adaxial surface and abaxial surface). E. Stipules. F. The ring of reddish-brown hairs at the nodes and adjacent leaf axils. G. Inflorescence. H. Flower. I. The longitudinal cross section of corolla shows filamens and anthers. J. Calyx, style and stigma. K. Infruitescence. L. The sross section of fruit show pyrenes and albumen. M. Fruit when wipe. N. Pynenes. (All photo by Nguyen Quoc Bao)

Psychotria phuquocensis Bao, Vuong & V.S.Dang, sp.nov.

 

Diagnosis: Similar to Psychotria fluviatilis Chun ex W.C.Chen distributed in Chinain having lanceolate leaf blades, cymose inflorescence, and similar penduncle length, but this new species is distinguished by having larger leaf blades (10.5-23.0 × 3-4.7 cm vs. 5–11 × 1– 3.7 cm), more numerous secondary veins (10-16 pairs vs. 4–8 pairs), domatia (present vs. absent), larger stipules (9-11 mm long vs. 4–7 mm long), and fruit length (7-9 mm vs. 6–7 mm).

Etymology: The specific epithet refers to Phu Quoc National Park where it was discovered. Vernacular name: Lấu phú quốc

Van Toan Em Quach, Van Son Dang, Van Ngot Pham, Ba Vuong Truong, Ngoc Minh Trung Nguyen, Quoc Trong Pham and Quoc Bao Nguyen. 2024. Psychotria phuquocensis Bao, Vuong & V.S.Dang, A New Species of Rubiaceae from Phu Quoc National Park, southern Vietnam. Taiwania. 69(3); 366-371. DOI: 10.6165/tai.2024.69.366   taiwania.ntu.edu.tw/abstract/2012

[Botany • 2021] Gastrochilus dresslerii (Orchidaceae: Epidendroideae) • A New Species of Gastrochilus sect. Microphyllae from northern Vietnam

Gastrochilus dresslerii Vuong, Aver. & V. S. Dang,

in Nguyen, Averyanov, Dang, Bui, Maisak et Truong, 2021. 

DOI: 10.11646/phytotaxa.498.2.8

 

Abstract

The new species, Gastrochilus dresslerii (G. sect. Microphyllae) discovered in northern Vietnam (Ha Giang Province) is described and illustrated, and data on its phenology, ecology, and distribution is provided. Morphological resemblance of discovered plant with allied species are also discussed.

Gastrochilus sect. Microphyllae, Ha Giang Province, new species,  plant diversity, plant taxonomy, Endemism, Monocot

Gastrochilus dresslerii Vuong, Aver. & V. S. Dang, sp. nov.

Dinh Hiep Nguyen, Leonid V. Averyanov, Van Son Dang, Van Huong Bui, Tatiana Maisak and Ba Vuong Truong. 2021. Gastrochilus dresslerii (Orchidaceae), A New Species from northern of Vietnam. Phytotaxa. 498(2); 145–149. DOI: 10.11646/phytotaxa.498.2.8

[Botany • 2023] Hoya honglenae (Apocynaceae: Asclepiadoideaea) • A New Species, and the First Report of H. acuminata and H. phuwuaensis in the Flora of Vietnam

Hoya honglenae Aver., Vuong, Bao & V.C. Nguyen, 

in V.C. Nguyen, Averyanov, Q.B. Nguyen, Dang, V.K. Nguyen, Maisak et Truong, 2023.

DOI: 10.11646/phytotaxa.632.1.5

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Abstract

Three species of the genus Hoya (Apocynaceae, Asclepiadoideae) are newly reported for the flora of Vietnam. One species, Hoya honglenae, is described and illustrated as new to science, and two species, H. acuminata and H. phuwuaensis, are reported as new national records known earlier, respectively, in Bhutan, Bangladesh, NE India, W China, Myanmar; and NE Thailand. The new species discovered in Phu Quoc Island (Kien Giang Province) morphologically is most close to H. phuwuaensis, but differs in the entire, straight leaf margin, leaves sparsely white speckled adaxially and dirty purple speckled abaxially, smaller yellow flowers, conoid, obtuse, distally up-cured outer angle of corona lobes, and much longer anther appendages. The paper provides morphological descriptions, data on habitat, phenology, distribution, estimated conservation status, taxonomic notes, a list of studied specimens, and color illustrations for all studied species. Taking into consideration our new data, the genus in Vietnam currently includes 44 species.

 

Eudicots, endemism, Hoya sect. Peltostemma, Hoya sect. Pterostelma, Hoya caudata, Hoya soidaoensis, Kien Giang Province, Phu Quoc Island, plant conservation, plant diversity, plant taxonomy

 Hoya honglenae Aver., Vuong, Bao & V.C. Nguyen

  

Van Canh Nguyen, Leonid V. Averyanov, Quoc Bao Nguyen, Van Son Dang, Van Khuong Nguyen, Tatiana V. Maisak and Ba Vuong Truong. 2023. A New Species, Hoya honglenae and the First Report of H. acuminata and H. phuwuaensis (Apocynaceae, Asclepiadoideae) in the Flora of Vietnam. Phytotaxa. 632(1); 60-68. DOI: 10.11646/phytotaxa.632.1.5

 facebook.com/HongLen/posts/10222180428812061

[Botany • 2020] Cylindrolobus chienii (Orchidaceae) • A New Species from Central Highlands of Vietnam

Cylindrolobus chienii Vuong, Aver., V.C. Nguyen, & T.T.D. Pham, 

in Nguyen, Averyanov, Nguyen, Pham, Maisak et Truong, 2020.

  taiwania.ntu.edu.tw/abstract/1684 

 Researchgate.net/publication/341322450

Abstract
The orchid species new for science, Cylindrolobus chienii (Orchidaceae) discovered on Chu Mu Mountain, M’Drak District, Dak Lak Province of southern Vietnam is described and illustrated. It morphologically close to C. gloensis and C. bidupensis but differs from them in glabrous 2-flowered inflorescence, calli on labellum and character of the lip indumentum.

Keyword: Cylindrolobus bidupensis, C. gloensis, Endemism, Eria, Plant taxonomy

 Cylindrolobus chienii Vuong, Aver., V.C. Nguyen, & T.T.D. Pham.
 Morphological characters based on living fresh collected plants, prior to preparation of the herbarium type voucher specimen. A. Flowering plant in nature. B, C, E. Inflorescence, frontal and side views. D. Flowering stem. F. Flower, side view. G. Flattened floral bracts. H. Flattened sepals and petals. I. Column and column foot, side view; lip, view from above. J. Lip and column, side view. K. Lip, view from above. L. Hairs on median lobe. M. Column, frontal view, N. Callus on column foot apex.

All photo by Nguyen Van Canh from plant prior preparation the type specimen BV 514, correction and design by L. Averyanov and T. Maisak.

Cylindrolobus chienii Vuong, Aver., V.C. Nguyen, & T.T.D. Pham.
Morphological characters based on alcohol fixed material. A. Leaf, adaxial surface. B. Flattened sepals and petals. C. Intact lip, side view. D. Intact lip half-side views. E. Intact lip, view from below. F. Flattened lip adaxial surface. G. Flattened lip, abaxial surface. H. Bilobed fleshy plate on distal part of the lip callus at the base of median lip lobe, view from above and frontal view. I. Bilobed fleshy plate on distal part of the lip callus, view frontal view. J. Indumentum on median lip lobe. K. Anther cap, frontal view and view from below. L. Pollinia.

All photo by Truong Ba Vuong based on alcohol preserved material stored in VNM herbarium collected from specimens used for preparation of the voucher herbarium type specimen BV 514, correction and design by L. Averyanov and, T. Maisak.

Cylindrolobus chienii Vuong, Aver., V.C. Nguyen & T.T.D. Pham, sp. nov.

Etymology. The species epithet refers to the name of the plant discoverer, Mr. Pham Van Chien. The Vietnamese name is Nỉ Lan Chiến (nov.). 

    

Van Canh Nguyen, Leonid V. Averyanov, Van Khuong Nguyen, Thi Thanh Dat Pham, Tatiana V. Maisak, Ba Vuong Truong. 2020. Cylindrolobus chienii (Orchidaceae), A New Species from Central Highlands of Vietnam. Taiwania. 65(3); 272-276. DOI: 10.6165/tai.2020.65.272

  taiwania.ntu.edu.tw/abstract/1684

Researchgate.net/publication/341322450_Cylindrolobus_chienii_a_new_species_from_Central_Highlands_of_Vietnam