Bulbophyllum helenae J.J. Sm. 1912 SECTION Cirrhopetalum [Lindl.] Rchb.f 1861
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Photo by David Jubineau Copyright ©
UNPLEASANT
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LATER 
Common Name Helen's Bulbophyllum - In China Jiao E Juan Ban Lan
Flower Size 1 3/5" [4 cm]
Found in Yunnan province of China, the western Himalayas, Nepal, Sikkim, Myanmar and Thailand in montane forests as a small sized, warm to cold growing epiphyte or lithophyte at elevations of 800 to 2700 meters with 1.2 to 2.4" [3 to 6 cm] between each long-ovoid pseudobulb carrying a single, apical, erect, coriaceous, oblong, narrowing below into the petiolate base leaf that blooms in the later spring and summer on a basal, 2 to 3” [5 to 7.5 cm] long inflorescence with imbricate, tubular sheaths and narrowly lanceolate, acute floral bracts and carrying 5 to 9 stinky flowers.
This cute orchid requires shade, very humid conditions and regular water and fertilizer year round.
This species and B forrestii are very similar but differ mostly in the erose dorsal sepal found in this species and the entire margin dorsal sepal of B forrestii
This species and B nodosum but it differs in having nodular swellings on the thick rhizome and has somewhat larger sepals.
Synonyms Bulbophyllum cornutum (Lindl.) Rchb. f. 1864; Cirrhopetalum cornutum Lindl. 1838; Phyllorchis cornuta (Lindl.) Kuntze 1891; Phyllorchis helenae Kuntze 1891; Rhytionanthos cornutum [Lindl.] Garay, Hamer, $ Siegerist 1994
References W3 Tropicos, Kew Monocot list , IPNI ; The Orchids of Sikkim-Himalaya Part 1 King & Pantling 1898 as Cirrhopetalum cornutum drawing ok; Notes on Cirrhopetalum Seidenfadden 1973 drawing fide; Dansk Botanisk Arkiv Bind 33 #3 Orchid Genera in Thailand VIII Bulbophyllum Thou Seidenfaden 1979 drawing fide; Indian Orchids Guide to Identification and Culture Pradhan 1979 drawing fide; Orchid Digest Vol 44 No 4 1980 as Cirrhopetalum cornutum photo/drawing fide; Orchids of Arunachal Pradesh Hegde 1984 photo good; AOS Bulletin Vol 54 No 3 1985 as B helenae; Orchids of Northwest Himalaya Deva & Naithani 1986 drawing fide; Orchids of Kumaun Himalayas Pangtey, Samant and Rawat 1991; Orchids of Nagaland Deorani & Naithani 1995 drawing good; Wild Orchids of China Tsi, Chen Mori 1997 photo fide; Native Orchids of China in Colour Singchi, Zhanhuo and Yibo 1999 photo fide as Bulbophyllum helenae; Orchids Of India II Biodiversity & Status of Bulbophyllum Thou Augustine & Kumar 2001 as Rhytionanthos cornutum; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2001 as Rhytionanthos cornutum photo fide; Bulbophyllum and Their Allies Seigerist 2001 as Rhytionanthos cornutum; Rudolf Schlechter Die Orchideen Band 1C lieferung 42 - 43 pg 2626 - 2762 Brieger 2001 as Rhytionanthes cornutum drawing/photo fide; Orchids of Bhutan Pearce & Cribb 2002 photo fide; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 as Rhytionanthum cornutum photo fide; Turczaninowia 19 (3): 5–58 L. V. Averyanov1 , Khang Sinh Nguyen etal 2016 ; Orchids of India A Glimpse Misra 2007 as Rhytionanthe cornutum photo fide; Flora of China Vol 25 Zhengyi, Raven & Deyuan 2009; Flora of China Vol 25 Illustrations Zhengyi, Raven & Deyuan 2010 drawing fide; A Field Guide to the Orchids of China Singchi, Zhongjian, Yibo, Xiaohua and Zhanhuo 2009 photo fide; The Wild Orchids in Yunnan Xu Xiang Ye & Liu 2010 photos fide; Bulbophyllum of Borneo J J Verm, P O'Byrne and Lamb 2015; Wulfenia 22 [2015]: 137 - 188 New Orchids in the Flora of Vietnam Averyanov, Nguyen, Tich, Nguyen, Nong, Nguyen and Xuan photo fide; LANKESTERIANA 15(1): 7—50. Jeewan Singh Jalal & J. Jayanthi 2015; Atlas of Native Orchids of China Vol 2 Jin Xiaohua, Li Jianwu and Ye Deping 2019 photo fide;
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