Bulbophyllum sect. Hirtula in eastern Indochina

Taiwania 62(1): 1‒23, 2017

Leonid V. AVERYANOV1,* , Khang Sinh NGUYEN2 , Van Duy NONG3 , Van Canh NGUYEN4 , Ba Vuong TRUONG5 and Tatiana V. MAISAK1

1. Komarov Botanical Institute of the Russian Academy of Sciences, Prof. Popov Street
2, RU-197376, St. Petersburg, Russia.
2. Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam.
3. Tay Nguyen Institute for Scientific Research, Vietnam Academy of Science and Technology, 116 Xo Viet Nghe Tinh St., Da Lat City, Lam Dong, Vietnam.
4. 3/12/3 Vo Van Kiet str., Buon Ma Thuot City, Dak Lak province, Vietnam.
5. Institute of Tropical Biology, Dept of Biological resources, 85 Tran Quoc Toan St., Distr. 3, Ho Сhi Minh City, Vietnam. * Corresponding author email: av_leonid@mail.ru

(Manuscript received 31 July 2016; accepted 3 December 2016; online published 25 January 2017)

 ABSTRACT: Modern taxonomic revision of Bulbophyllum sect Hirtula in the flora of eastern Indochina, including Cambodia, Laos and Vietnam based on all available collections and literature data reports 12 species (Bulbophyllum clipeibulbum, B. dasystachys, B. glabrichelia, B. nigrescens, B. nigripetalum, B. parviflorum, B. penicillium, B. phitamii, B. scaphiforme, B. secundum, B. setilabium, B. spadiciflorum), 2 of which represent new records for the studied flora (B. parviflorum, B. penicillium) and 3 (Bulbophyllum glabrichelia, B. phitamii, B. setilabium) are described as a new for science. For all accepted taxa the paper provides valid name and main synonyms with appropriate standard taxonomic references, data on type and other authentic materials, description, data on ecology, phenology, expected conservation status, distribution, notes on biology and taxonomy, list of all studied materials, as well as key for identification of species and their line and color illustrations.
KEY WORDS: Bulbophyllum sect. Hirtula, Orchidaceae, Cambodia, Laos, Vietnam, New species, Plant diversity, Plant taxonomy

Bulbophyllum clipeibulbum
Fig. 4. Bulbophyllum clipeibulbum J.J. Verm. (A-D - L.Averyanov, N.T.Hiep, N.Q.Hieu et al., VH 6256). B. dasystachys J.J. Verm., Thavipoke et Phelps (E-F - Nghiem Xoan Son, L.Averyanov, T.Maisak, AL 96; G - Le Van Thanh, s.n.; H-I - L.Averyanov, s.n.). All photos by L. Averyanov.

Bulbophyllum glabrichelia
Fig. 6. Bulbophyllum glabrichelia Aver. (A, B, F, G - L.Averyanov et al., CPC 2137; C–E, H-K -- N.T.Hiep et al., LA-VN 1321a). Photos by L. Averyanov (A, B, F, G, H–K) and K.S. Nguyen (C–E).

Bulbophyllum nigrescens
Fig. 8. Bulbophyllum nigrescens Rolfe. (N.T.Hiep et al., LA-VN 1002). Photos by K.S. Nguyen (A–C) and L. Averyanov (D–G).

Bulbophyllum nigripetalum
Fig. 10. Bulbophyllum nigripetalum Rolfe. (A, B, D - L.Averyanov April 2010, s.n.; C - L.Averyanov et al., AL 93). B. parviflorum Par. et Rchb.f. (E–G - L.Averyanov, T.Maisak, AL 154). B. penicillium Par. et Rchb.f. (H, K - N.Q.Hieu, N.T.Hiep, N.T.Vinh et al., CPC 250; I - L.Averyanov, P.K.Loc, N.T.Vinh, A.Averyanova, HAL 6564; J - L.Averyanov, P.K.Loc, D.T.Doan, HAL 2828c). Photos by L. Averyanov (A–G, I, J) and P.V. The (H, K).

Bulbophyllum phitamii
Fig. 12. Bulbophyllum phitamii Aver. Digital epitype - d-EXSICCATES OF VIETNAMESE FLORA 0246/AL 206. Photos by L. Averyanov and P.T. Nguyen, design and image correction by L.Averyanov.

Bulbophyllum scaphiforme
Fig. 14. Bulbophyllum scaphiforme J.J. Verm. (A, B, E, G–I - L.Averyanov et al., HAL 4607; C, D, F - L.Averyanov 2010 April, s.n.). Bulbophyllum setilabium Aver. (J–L - N.T.Hiep et al., LA-VN 1239, type). Photos by L.Averyanov.

Bulbophyllum spadiciflorum
Fig. 16. Bulbophyllum spadiciflorum Tixier. (A–D - 2 May 2015, L.Averyanov s.n.). Photos by L.Averyanov.

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