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| Bulbophyllum pulanense Yudistira, F.H.Kurniawan & Mustaqim, in Yudistira, Kurniawan & Mustaqim, 2022. |
Abstract
A new species of orchid, Bulbophyllum pulanense, is described based on specimens collected from Kapuas Hulu Regency, Kalimantan Barat Province of Indonesian Borneo. Bulbophyllum lyriforme, is also presented here as a new record for Borneo, formerly only known from cultivated plants collected from New Guinea. Both species are described and illustrated with both line drawings and photographs.
Keyword: Bulbophyllum alticaule, B. haematostictum, B. pulanense, heath forest orchid, Malesian orchid, peatland orchid
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| Morphology of Bulbophyllum pulanense sp. nov. A. Plant habit; B. Inflorescence; C. Flower; D. Median sepal; E. Petal; F. Lateral sepal; G. Labellum; H. Labellum adaxial view; I. Labellum abaxial view; J. Labellum lateral view with column; K. Labellum detailed surface; L. Anther abaxial view; M. Anther adaxial view; N. Pollinia in pairs; O. Pollinia single. Illustrated by F.H.Kurniawan. |
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| Bulbophyllum pulanense sp. nov. A. Habits; B. Roots from internode; C. Leaf blade; D. Inflorescence; E. Flower front view; F. Flower side view; G. Pedicel with column; H. Perianth adaxial view; I. Perianth abaxial view; J. Labellum adaxial view; K. Labellum abaxial view; L. Labellum lateral view with column; M. Stelidia; N. Anther adaxial view; O. Anther abaxial view; P. Pollinia. Photographed by F.H. Kurniawan / Yayasan Akar Banir Indonesia |
Bulbophyllum pulanense Yudistira, F.H.Kurniawan & Mustaqim, sp. nov.
Bulbophyllum pulanense is similar to B. haematostictum but differs in the flowers fully open (vs. not fully open) and fragrant (vs. smell foul), lateral sepals strongly reflexed in the upper third (vs. straight), labellum with margin entire (vs. irregular), labellum distinctly concave at the base (vs. slightly concave) with the base not drawn out (vs. drawn out), labellum with a distinct longitudinal ridge running from the base to 1/2–2/3 of its length on each side (vs. blunt), apical margin with distinct sinus on each side (vs. sinus absent), abaxial side with longitudinal median groove (vs. ridged), apex obtuse (vs. acute), and stelidia shorter (0.4–0.5 mm vs. 0.8–1.8 mm) with apical cusp (vs. cusp absent). This species is also similar to B. alticaule but differs in having inflorescence sub-umbellate (vs. raceme) bearing 2–3 flowers (vs. 8– 22), shorter peduncle (1.5–2.8 cm vs. 13–16 cm), rachis shorter (0.5–1.1 mm vs. 3–6 cm), flower resupinate (vs. not resupinate), lateral sepals reflexed (vs. straight), petals cuspidate to shortly caudate (vs. rounded), labellum larger, 8.4–10.4 × 5.7–8.3 mm (vs. c. 5 × 4 mm), apical margin with distinct sinus on both sides (vs. absent), stelidia with apical cusp (vs. absent), tooth along the lower margin deltoid (vs. rounded); anther not drawn out in front (vs. drawn out) (Table 1).
Distribution: Endemic to Indonesian Borneo: Kalimantan Barat Province, only known from Kapuas Hulu Regency (Fig. 3).
Ecology: Lowland heath and peat swamp forest, from 45–90 m asl.
Etymology: The epithet refers to the Pulan hamlet where the type specimen was collected.
Yuda R. Yudistira, Firman H. Kurniawan and Wendy A. Mustaqim. 2022. Bulbophyllum (Orchidaceae: Epidendroideae) of Indonesian Borneo: A New Species and First Record for B. lyriforme. Taiwania. 67(4); 544-551. taiwania.ntu.edu.tw/abstract/1872
