Bulbophyllum sect. Trias (Lindley, 1830) Vermeulen, 2014

Roy, Dilip Kr., Barbhuiya, H. A., Talukdar, A. D. & Sinha, B. K., 2014, Bulbophyllum manabendrae (Orchidaceae: Epidendroideae), a new species from Meghalaya, India, Phytotaxa 164 (4), pp. 291-295 : 294

Key to the Indian species of Bulbophyllum sect. Trias

1. Lip more than 10 mm long with obtuse apex; front of operculum terete conical obtuse.................................................................. 2

1. Lip less than 7 mm, apex obtuse or somewhat acute, operculum variable .......................................................................................4

2. Leaves usually more than 10.0 cm long, ca. 2.5 cm broad; sepals light greenish-yellow, 20–25 mm long; lip 14–18 mm long, with small vertical thin obliquely triangular auricles.................................................................................................. B. disciflorum Rolfe

2. Leaves always less than 10.0 cm, 1.0– 1.5 cm broad; sepals light yellow to greenish yellow or creamy yellow with crimson red spots, 10–15 mm long, lip up to 12 mm long, auricles slender or triangular ....................................................................................3

3. Leaves 6.0–9.0 cm long; sepals light yellow to greenish yellow; petals linear, with purple tips, ca. 5 mm long; lip auricles slender forwards pointing teeth ......................................................................................................................................... B. nasutum Rchb. f.

3. Leaves 2.5–3.5 cm long; sepals creamy yellow with crimson red spots; petals triangular, snowy white, ca. 3.5 mm long; lip auricles triangular, obtuse at apex ............................................ B. bonaccordense (C.S.Kumar) J.J.Verm., Schuit. & de Vogel (in press)

4. Petals with one vein; operculum prolongation cylindric terete........................................................................................................... ........................................................................................... B. stocksii (Benth. ex Hook.f.) J.J.Verm., Schuit. & de Vogel (in press).

4. Petals with three veins; operculum prolongation flat, apex broad truncate ...................................................................................... 5

5. Leaves 2.5–3.0 cm long; sepals yellowish brown to dirty orange, 8–9 mm long; lip deltoid, dark olive-green, with raised auricular corners ................................................................................................................................................... B. oblongum (Lindl.) Rchb. f.

5. Leaves 1.1–1.7 cm long; sepals dark-red, 5–6 mm long; lip broadly elliptic, dark red with hook-like auricles at base .................... ..................................................................................................................... B. manabendrae D.K.Roy, Barbhuiya & A.D.Talukdar