| 1 |
Pseudobulbs absent; leaves and scapes arising from rhizomes. |
|
(2) |
| + |
Pseudobulbs present; leaves at apex of pseudobulbs; scapes arising from base of pseudobulbs. |
|
(5) |
| |
|
|
|
| 2 (1) |
Rhizomes, erect or ascending, not firmly creeping on substrate; leaves closely arranged on rhizome |
|
Bulbophyllum riyanum |
| + |
Rhizome firmly prostrate on substrate; leaves remotely arranged on rhizomes. |
|
(3) |
| |
|
|
|
| 3 (2) |
Flowers usually solitary; sepals 8-16 mm long; lip with 2 raised ridges near base. |
|
Bulbophyllum drymoglossum |
| + |
Flowers 2 or 3; sepals less than 4 mm long; lip without distinct ridges near base. |
|
(4) |
| |
|
|
|
| 4 (3) |
Leaves elliptic, 1-2 cm long; flowers 2 or 3; lip oblong, not clawed at base. |
|
Bulbophyllum aureolabellum |
| + |
Leaves elliptic-orbicular, less than 1 cm long; flowers usually 2; lip ovate-triangular, with a distinct long claw at base. |
|
Bulbophyllum tokioi |
| |
|
|
|
| 5 (1) |
Inflorescence a raceme, 5-15 cm long; flowers 6 or more, loosely arranged. |
|
Bulbophyllum insulsum |
| + |
Inflorescence with one to many flowers, flowers solitary, umbellate or subumbellate, rarely a short condensed raceme less than 2 cm long. |
|
(6) |
| |
|
|
|
| 6 (5) |
Dorsal sepal as long as lateral sepals or nearly so. |
|
(7) |
| + |
Dorsal sepal less than 2/3 length of lateral sepals. |
|
(9) |
| |
|
|
|
| 7 (6) |
Rhizome distinct; pseudobulbs nearly cylindrical; leaves 6-18 cm long. |
|
Bulbophyllum affine |
| + |
Rhizome very short or obscure; pseudobulbs ovoid to nearly globose; leaves less than 10 cm long. |
|
(8) |
| |
|
|
|
| 8 (7) |
Flowers solitary; sepals more than 2 cm long. |
|
Bulbophyllum pectinatum |
| + |
Flowers more than 5, in a short compact raceme appearing like a capitate umbel; sepals ca. 4 mm long. |
|
Bulbophyllum rubrolabellum |
| |
|
|
|
| 9 (6) |
Inflorescences with 6 or more flowers in a short raceme. |
|
Bulbophyllum taiwanense |
| + |
Inflorescences with less than 6 flowers in a short umbel-like raceme, or with many flowers in umbel. |
|
(10) |
| |
|
|
|
| 10 (9) |
Dorsal sepal and petals entire, not ciliate. |
|
(11) |
| + |
Dorsal sepals and petals varyingly ciliate. |
|
(14) |
| |
|
|
|
| 11 (10) |
Leaves 2-4 cm wide; pseudobulbs usually smooth. |
|
Bulbophyllum macraei |
| + |
Leaves less than 2 cm wide; pseudobulbs sulcate or tessellate at maturity. |
|
(12) |
| |
|
|
|
| 12 (11) |
Pseudobulbs 2-2.5 cm long; leaves 8-12 cm long; lateral sepals usually free. |
|
Bulbophyllum umbellatum |
| + |
Pseudobulbs less than 1.5 cm long; leaves less than 7 cm long; lateral sepals usually connate for some length. |
|
(13) |
| |
|
|
|
| 13 (12) |
Leaves linear, apex acute or acuminate; lip with a globose thickening at apex. |
|
Bulbophyllum japonicum |
| + |
Leaves oblong, apex obtuse or retuse; lip not as above |
|
Bulbophyllum retusiusculum |
| |
|
|
|
| 14 (10) |
Rhizomes distinct, 2-3 mm in diam.; pseudobulbs 1.5-4 cm long, 1-2.5 cm wide; leaves 5-12 cm long, 1.5-2.5 cm wide. |
|
(15) |
| + |
Rhizomes inconspicuous or distinct, less than 2 mm in diam.; pseudobulbs less than 1 cm wide; leaves 2-10 cm long, less than 1.5 cm wide. |
|
(16) |
| |
|
|
|
| 15 (14) |
Flowers orange yellow to reddish, with dark purple streaks and spots; dorsal sepal 1.5-2.4 cm long, 1-1.5 cm wide; lip short hirsute on laterally near base |
|
Bulbophyllum wightii |
| + |
Flowers greenish yellow, with minute reddish brown spots; dorsal sepal 1-1.3 cm long, 0.7-0.8 cm wide; lip glabrous throughout. |
|
Bulbophyllum omerandrum |
| |
|
|
|
| 16 (14) |
Inflorescence a short raceme, 5-10 mm long; lateral sepals free, divergent. |
|
Bulbophyllum taiwanense |
| + |
Inflorescence an umbel of few to many flowers, or a raceme less than 3 mm long; lateral sepals partly connate along edges. |
|
(17) |
| |
|
|
|
| 17 (16) |
Rhizomes less than 1 mm in diam.; flowers reddish, sepals and petals white ciliate, lateral sepals 7-9 mm long |
|
Bulbophyllum albociliatum |
| + |
Rhizomes 1-2 mm in diam.; flowers not as above; lateral sepals more than 12 mm long. |
|
(18) |
| |
|
|
|
| 18 (17) |
Rhizomes distinct; pseudobulbs 3-6 cm apart; leaves 4-10 cm long; flowers pale yellow, with dark red continuous or broken lines |
|
Bulbophyllum melanoglossum |
| + |
Rhizomes short or obscure; Pseudobulbs usually less than 1.5 cm apart; leaves usually less than 6 cm long; flower not colored as above. |
|
(19) |
| |
|
|
|
| 19 (18) |
Scape 14-16 cm long; with 12-16 flowers; lateral sepals slender, 3-4 cm long, 2 mm wide; petals obtuse to rounded at apex. |
|
Bulbophyllum setaceum |
| + |
Scape usually less than 10 cm long, with 4-10 flowers; lateral sepals 1.5-4 cm long, more than 3 mm wide at base; petals acute to acuminate. |
|
(20) |
| |
|
|
|
| 20 (19) |
Dorsal sepal not caudate at apex; lateral sepals less than 2 cm long, distinctly ciliate along margin. |
|
Bulbophyllum electrinum |
| + |
Dorsal sepal distinctly caudate at apex; lateral sepals longer than 2.3 cm, not ciliate. |
|
(21) |
| |
|
|
|
| 21 (20) |
Scape 4-6 cm long; flower pale orange to yellowish; lateral sepals tinged with vermilion near base; lip reddish. |
|
Bulbophyllum hirundinis |
| + |
Scape 7-10 cm long; flowers pale green to yellow; lateral sepals totally yellow; lip yellowish white. |
|
Bulbophyllum pectenveneris |
