Dendrobium bellatulum Rolfe
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publication ID |
https://doi.org/ 10.5252/a2016n2a5 |
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persistent identifier |
https://treatment.plazi.org/id/03E0C640-123A-E142-FEE7-D998FAEEC12B |
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treatment provided by |
Carolina |
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scientific name |
Dendrobium bellatulum Rolfe |
| status |
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1. Dendrobium bellatulum Rolfe View in CoL
The Journal of the Linnean Society (Botany) 36: 10 (1903); Botanical Magazine 18: table 7985 (1904). — Gagnep., Flore générale de l’Indo-Chine 6 (2): 226, fig. 19, 6-8 (1933). — Seidenf., Opera Botanica 83: 103, fig. 60, table 13b (1985); 114: 210, table 13c (1992). — Aver., Identification Guide to Vietnamese Orchids: 183 (1994). — P.H.Ho, An Illustrated Flora of Vietnam 3: 826, fig. 11055 (2000). — Aver. & Averyanova, Updated Checklist of the Orchids of Vietnam: 26 (2003). — Newman et al., A Checklist for the Vascular Plants of Lao: 262 (2007). — Schuiteman et al., Nordic Journal of Botany 26: 280 (2008). — Zhu Guanghua et al., Flora of China 25: 391 (2009).
TYPUS. — SW China. Yunnan: Mengtze 5000 ft., Henry 11109 (holo-, K [ K000943750 ]) .
HABITAT, PHENOLOGY AND CONSERVATION STATUS. — Epiphyte on tall trees in primary and secondary, closed and open broad-leaved, mixed and coniferous forests, particularly on ericaceous trees on mountain tops. (600)700-1700(2000) m. Fl. December-April. Locally common. Expected IUCN Red List status – EN.
DISTRIBUTION. — Laos (Champasak), Vietnam (Dak Lac, Kon Tum, Lam Dong, Ninh Thuan). NE. India, Myanmar, S. China, Thailand. MATERIAL EXAMINED. — Laos. Champasak, Bolovens, Sedone, A.D.Kerr 1645 (C).
Vietnam. Dak Lac, Krong Bong, Chu Yang Sinh mt., VH 6155 ( HN, MO); Kon Tum, Dacuy, L.Averyanov et al., LX-VN 2214 ( HN, LE); Kon Tum, Dak Gley, VH 2297 ( HN, P [ P 00386129], MO); Kon Tum, Konplong, Mang Den, L.Averyanov et al., LX-VN 2282 ( HN, LE); Kon Tum, L.Averyanov et al., LX-VN s.n. anno 1985 ( LE photo); Lam Dong, Dalat, CRST 13 ( P [ P 00386139]), Evrard 937 ( P [ P 00386133]), 1798 ( P [ P 00386134]), 1880 ( P [ P 00386135]), 1913 ( P [ P 00386136]), 1962 ( P [ P 00386137]), 2168 ( P [ P 00386138]), A.D.Kerr s.n. ( C), L.Averyanov HAL s.n. 2004 ( LE photo); Lam Dong, Lac Duong, Bi Dup mt., VH 2693 ( HN, LE, MO), HLF 5202 ( HN); Lam Dong, Langbian, Chevalier 30699 ( P [ P 00386130, P 00386131]); Lam Dong, 8.5 km to S from Dalat, VH 2623a ( HN, LE photo); Lam Dong, 14 km to NNW from Dalat, VH 2566 ( HN, LE, MO), VH 2567 ( HN, LE); Ninh Thuan, Ninh Hai, Nui Chua mt., HLF 4318 ( HN, MO); Vietnam, sine loc., Eberhardt 69 B ( P [ P 00386132]).
DESCRIPTION
Stems erect, clavate to obovoid, 2-5(7) cm long, 1-1.5 cm in diameter, with 2-5(6) nodes. Leaves 2-4, ovate to oblong, 1.5- 4 cm long, 0.6-1.4 cm wide, shortly black hairy, unequally bilobed at apex. Inflorescence 1(2), 1-2(3) flowered, subterminal on mature stems; peduncle and rachis 2-6 mm long; floral bracts ovate, membranaceous, 5-8 mm long. Pedicel and ovary pale greenish, 1-2 cm long. Flowers widely opening, 2.5-3 cm across, white, lip red with yellow epichile, rarely entirely red. Sepals and petals subsimilar, narrowly ovate, acute, 1.5-2 cm long, 5-8 mm wide, lateral sepals oblique; mentum broadly conical, 1-1.5 cm long. Lip pandurate, 2-2.6 cm long, 1.2- 1.6 cm wide; lateral lobes ovate, erect; median lobe 2-lobed, bent down; disc fleshy, with 5 indistinct rugose to papillose keels. Column pink, 2-3 mm tall; anther cap broadly conical, papillose ( Fig. 1A, B View FIG ).
REMARKS
Remarkable forms of this species with entirely red lip lacking any yellow on epichile occasionally occur in highland Pinus kesiya woodlands around Dalat city area in Lam Dong province of the southern Vietnam ( Fig. 1B View FIG ).
Some cultivated plants originated from Thailand develop pseudobulbs to 7 cm long consisting of 6 (or more) nodes. Such plants do not differ in any other character.
| K |
Royal Botanic Gardens |
| HN |
National Center for Natural Sciences and Technology |
| MO |
Missouri Botanical Garden |
| L |
Nationaal Herbarium Nederland, Leiden University branch |
| LE |
Servico de Microbiologia e Imunologia |
| P |
Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants |
| A |
Harvard University - Arnold Arboretum |
| C |
University of Copenhagen |
| HAL |
Martin-Luther-Universität |
| S |
Department of Botany, Swedish Museum of Natural History |
| B |
Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien Universitaet |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.