64 OBCHIDS OP THE SIKKIM-HIMALAYA.
6 . Bulboptiyllum, Tliouars.
Epiphytal; pseudo-bulhs from a creeping rhizomo (someticoes absent). Leaves
thick and persistent (deciduous ia B. polyrhisum)-, or in pairs and thin and deciduous.
Scape from the rhizomo near the base of the pseudo-bulb, rarely distant from it. Flowers
solitary, capitate, umbellate, spicate or racemose. Sepals subequal, or the lateral pair
longer than tho dorsal (rarely twice as long); the lateral pair adnate to the foot of the
column. Petals various, usually much smaller than the dorsal sepal. Lip juiuted on the foot
of the column, mobile, usually small and strongly recurved. Column very short, often
2-arÍ5tato or toothed at the apex. Anther 2-celled; pollinia fom-, the two inner reduced
in size. A genus of about 250 species, tropical and sub-tropical, chiefly Asiatic; a
few African, Australian and American.
Flower solitary from near the base of a pseudo-bulb, minute, sessilo . . 1. B. Lhtari.
Flowers solitary or two or threo from near the base of a psoudo-bulb,
large ('5 to '75 in. long), on long pedicels.
Leaves I'o to 2 in. long; sepals and petals striped; pseudo-bulbs
ovoid, compressed 2. B. Grifpihii.
Leaves 8 to 6 or 7 in. long.
Sepals and petals striped; pserdo-hulbs cylindric 3. B. affine.
Sepals aud petals spotted; pseudo-bulbs obpyriform k. B. hopardimm.
Flowers in racemes, umbels or heads.
* Lateral eepols broad, not acuminate.
Flowers in racemes.
Flowers yellow or oohraceous (slightly spotted and streaked
with purple in B. conchiferwn).
Petals erose-dentate, lateral sepals falcate, diverging;
pedicel o£ ovary long 5. B. gymnopus.
Petals entire.
Lateral sepals cohering; ovary sessile . . . 6. B. rigidum.
Lateral sepals freo, spreading; ovary shortly
stalked 7. B. pohjrhinum.
Flowers dark-coloured, either purple or brown (green with
purple streaks in B. striaium, or partly green and yellow,
as in B. coynu-cei-ú),
liacemes de curved, densely-flowered; lateral sepals
cohering; leaves and flowers contemporaneous.
Lip entire; pseudo-bulbs none 8. B. cijliiidraceiwt.
Lip with lateral lobes; pseudo-bulbs more or leas
ovoid 9. B. Careyamm.
Racemes drooping, rather laxly-flowered; pseudo-bulbs
turbinate; leaves two, not contemporaneous with the
flowers 10. B. triste.
Scapes pendulous from the baso; petals spurred; lateral
sepals cohering, their apices aouminately beaked . . 11. B. biaetum.
Racemes erect; lateral sepals not cohering.
Columnar teeth lobed and horn-like; flowers with
green and yellow markings ; petals not ciliate j
pseudo-bulbs minute, fusiform; rhizome none . . 12. B. eornu-cervi.
Columnar teeth minute, triangular; flowers purple
with paler markings; petals ciliate j pseudo-bulbs
turbinate; rhizome slender 13. B. mundum.
BÜLBOPHYLLÜM. 65
Column not toothed; flowers green with purple stripes;
petals not ciliate; pseudo-bulbs broadly ovoid . . . llf. B. ilriatum.
Column not toothed; sepals and petals hyaline ; pseudobulbs
Done; racemes with two or sometimes only one
flower . 15. B. hymomnthum.
Flowers in dense heads, minute.
Pseudo-bulbs globose; leaves linear-oblong; rhizomo none . .Iß. B. píluli/erum.
Pseudo-bulbs none; leaves oblanccolate 17. B. graeilipos.
* Lateral sepals spreading, acuminate, tho bases broad; flowers variously
coloured; the lip always more or less purple.
Flowers in racemes; lip without capitate hairs.
Pseudo-bulbs distant on a thin rhizome IS. B. repUuis.
Pseudo-bulbs crowded, cylindric, 1-25 to 3 in. long; rhizome
none; lip shorter than the petals, the edge shortly ciliolate
near the base 19. B. euLkpharum.
Pseudo-bulbs crowded, ovoid, "75 to 1 in. long; rhizome stout;
lip much longer than the petals, as long as tho lateral sepals,
bearded 20. B. PaniciUium.
Flowers in heads; centre of lip excavated and filled with capitate
spreading hairs ^1. B. odoraiissimum.
* * Sepals all caudate-acuminate, the lateral pair narrow; flowers white,
greenish-white or pole yellow.
Flowers in umbels.
Pseudo-bulbs oblique; petals elongate, acute ; teeth of column
very long, slender.
Leaves 2 to 4 in.; pseudo-bulbs 1 to 175 in. long;
flowers greenish B. cauliflornm.
Leaves 1'5 to 2 in.; pseudo-bulbs '6 to "8 in. long;
flowers tinged with orange-yellow; floral bract very
short; lip grooved to nearly the apex SS. B. protracUm.
Psoado-balbs erect; petals ovate or oblong, usually blunt.
Petals ovate, lip grooved; teeth of column short,
triangular; floral bract as long as the ovary,
nouminate; pseudo-bulbs 1 to 1'25 in. long . . . B. leptnntham.
Petals oblong-lanceolate; lip ridged; teeth of column
acuminate; floral broiit not acuminate; pseudo-bulb
-5 to -65 in. long 25. B. Gamhki.
Petals broadly ovate, acute, 3-nerved; lip not grooved
to the apex; teeth of column long, subulate, curved;
floral bract half as long as the ovary, sub-acute;
pseudo-bulbs '4 in. long 26. B. Clarlcanum.
Flowers in raoemes.
Raceme with its peduncle shorter than the leaf; pseudo-bulbs
uone 27. B. ohtlbum.
i with its peduncle longer than the leaf.
Racemes erect, glabrous; pseudo-bulbs depressed-turbinate,
distant ^S. B. Thomsoni.
Racemes drooping, pubescent; pseudo-bulbs ovoid,
crowded 29. B. hirtuw.
AN-N, ROY. DOT. GARD., CALCUTTA, VOL. VIII.