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10 new orchid taxa found in Vietnam and also many new record orchid taxa for Vietnam's flora

Last modified on 29/12/2016 at 5:28:00 PM. Total 258 views.

On Taiwania 61(4) in 2016, Averyanov et al. has published 10 new orchid taxa and many new records as ordchids species for the flora of Vietnam. This is results from the authors' specimen analysis during 3 years, from 2014 to 2016 based on many collections of orchids in Vietnam's herbaria and neighboring countries herbaria also.

10 new orchid species and varieties found in Vietnam

Bidupia khangii Aver., sp. nov.

Etymology: Species is named after it’s discoverer – Dr. Khang Sinh Nguyen.

Habitat, phenology and conservation status: Creeping terrestrial herb. Primary broad-leaved and coniferous evergreen humid forests (with Cunninghamia konishii) on sandstone and shale, commonly on rich soils in shady places of steep slopes. 1100–2000 m. Fl. June–August. Not common.

Estimated IUCN Red List status - DD.

Distribution: Vietnam provinces: Ha Giang (Bac Me district), Nghe An (Phu Xai Lai Leng Mountains) and Tuyen Quang (Na Hang district). Endemic.

 

Bulbophyllum striatulum Aver., sp. nov.

Etymology. Species name refers contrasty striated coloration of sepals.

Habitat, phenology and conservation status: Creeping trunk and branch epiphyte. Dry broad-leaved evergreen and semideciduous forests and woodlands on basalt, shale and granite. 600–1000 m. Fl. November–December. Locally common.

Estimated IUCN Red List status - DD.

Distribution: Vietnam provinces: Dak Lak (Chu Yang Sin Mountains) and Kon Tum (Dak Ha disrict, Dak Uy commune). Endemic.

 

Bulbophyllum tipula Aver., sp. nov. 

Etymology: Flower of this species resembles long legs Diptera (Tipula, Tipulidae).

Habitat, phenology and conservation status: Creeping branch and canopy epiphyte. Primary broad-leaved humid evergreen forests on crystalline karstic highly eroded limestone. 1100–1150 m. Fl. June–July. Not common.

Estimated IUCN Red List status – DD.

Distribution: Vietnam province: Ha Giang (Bac Me district). Endemic.

 

Cleisostoma dorsisacculatum Aver., sp. nov.

Etymology: Species name refers unusual pillow-like container placed on the spur back-wall, unique among its congeners.

Habitat, phenology and conservation status. Canopy epiphyte. Primary and secondary broad-leaved evergreen forests on silicate rocks. 800–1200 m. Fl. October–December. Very rare.

Estimated IUCN Red List status – DD.

Distribution: Vietnam province: Lam Dong (Bao Loc). Endemic.

 

Cymbidium repens Aver. et Q.T. Phan, sp. nov.

Etymology: Species name refers creeping rhizomatous plant habit unique among its congeners.

Habitat, phenology and conservation status: Short creeping epiphytic vine. Primary and old secondary broad-leaved evergreen forests on rocky karstic limestone, commonly on trunks of Livistona chinensis. 400–600 m. Fl. August–September. Very rare.

Estimated IUCN Red List status - DD.

Distribution: Vietnam provinces: Hoa Binh (Lac Son district) and Phu Tho. Endemic.

 

Dendrobium congianum  Aver., sp. nov.

Etymology: Species is named after its discoverer Mr. Vo Van Cong.

Habitat, phenology and conservation status: Clustering epiphytic herb. Primary broad-leaved evergreen forests on granite. 1500–1800 m. Fl. March–  April. Very rare.                     

Estimated IUCN Red List status – DD.

Distribution: Vietnam province: Lam Dong (Dalat City area). Endemic.

 

Flickingeria xanthocheila Aver., sp. nov.

Etymology: Species name refers golden-yellow color of flower labellum.

Habitat, phenology and conservation status: Creeping epiphyte and lithophyte. Primary and secondary broad-leaved, mixed and coniferous evergreen lowland and submontane forests on rocky eroded limestone, commonly on mountain tops. 250– 1100 m. Fl. May–August. Locally very common.

Estimated IUCN Red List status - LC.

Distribution: Vietnam provinces: Bac Kan (Ba Be district, Ba Be national park, Cho Don and Na Ri districts), Cao Bang (Tra Linh and Trung Khanhdistricts), Ha Giang (Quang Ba and Vi Xuyen districts),Ninh Binh (Nho Quan district, Cuc Phuong national park), Son La (Moc Chau district) and Thai Nguyen (Vo Nhai district). S. China?

Phreatia densiflora (Blume) Lindl. var. vietnamensis Aver., var. nov.

Etymology: Varietal epithet refers country of its main distribution.

Habitat, phenology and conservation status: Epiphytic or occasionally lithophytic erect miniature herb. Primary broad-leaved and mixed evergreen shady forests on granite, gneiss and limestone, commonly on mossy substratum on mountain tops or along stream valleys. 500–1500 m. Fl. March–May. Not common.

Estimated IUCN Red List status – DD.

Distribution: Vietnam provinces: Khanh Hoa (Hon Ba Mountains; Khanh Son district), Kon Tum (Kon Tum town area), Lam Dong (Lac Duong district) and Quang Binh (Minh Hoa district). Endemic.

 

Phreatia formosana var. continentalis Aver., var. nov.

Etymology: Varietal epithet refers its mainland distribution.

Habitat, phenology and conservation status: Epiphytic erect miniature herb. Primary broad-leaved evergreen forests on limestone, shale, granite and gneiss, commonly as branch epiphyte on mossy trees on mountain tops, very steep slopes or along humid canyons. 500–1400 m. Fl. March–August. Not common

Estimated IUCN Red List status – DD.

Distribution: Vietnam provinces: Ha Giang (Bac Me district), Kon Tum (Ngoc Linh Mountains; Kon Plong district), Lam Dong (Dalat City area) and Quang Binh (Minh Hoa district). Endemic. 

 

Podochilus rotundipetala Aver. et Vuong, sp. nov.

Etymology: Species epithet refers almost circular petals

Habitat, phenology and conservation status: Clustering lithophytic herb. Primary humid broad-leaved evergreen montane forests on granite. 1400–1500 m. Fl. January–February, May–June. Rare.

Estimated IUCN Red List status – DD.

Distribution: Vietnam province: Khanh Hoa (Hon Ba Mountains). Endemic.

 

Other new orchid species records for Vietnam's flora

Ascocentrum ampullaceum  (Roxb.) Schltr.

Ascocentrum rubrum  (Lindl.) Seidenf.

Bulbophyllum bicolor Lindl. with two varieties as B. bicolor var. bicolor và B. bicolor  var.  funingense

Bulbophyllum psychoon  Rchb.f.

Bulbophyllum subtenellum Seidenf.

Cephalantheropsis laciniata  Ormerod

Chiloschista lunifera  (Rchb.f.) J.J. Sm.

Collabium chapaensis  (Gagnep.) Seidenf. et Ormerod

Dendrobium transparens  Wall. ex Lindl.

Gastrochilus suavis Seidenf.

Grammatophyllum  speciosum Blume

Habenaria falcatopetala  Seidenf.

Lecanorchis nigricans Honda

Porpax grandiflora Seidenf.

Taeniophyllum javanicum (J.J.Sm.) Kocyan et Schuit.

Taeniophyllum pusillum (Willd.) Seidenf. et Ormerod

Thecopus secunda  (Ridl.) Seidenf.

Thrixspermum hystrix  (Blume) Rchb.f.

Thrixspermum trichoglottis  (Hook.f.) Kuntze

Informaition of those species would be found on BVNwebsite Database

(Taiwania 61(4))

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