168 CXXXIII. ORCHIDEH (ROLFE). | Listrostachys. 
49. L. forcipata, Kränzl. in Engl. Jahrb. xix. 254. Plant very 
small. Rootlets numerous, much longer than the very short stem. 
Leaves ensiform, narrowly compressed, acute, straight or slightly curved, 
4 in. long, 5 lin. broad. Racemes much shorter than the leaves, few- 
flowered, apparently secund. Bracts triangular, acute ; base more or 
less clasping the slender pedicel and three or four times as short as it. 
Flowers 4 in. long, 2} lin. broad. Dorsal sepal oblong ; lateral obovate ; 
all very obtuse. Limb of the lip nearly obsolete, so that nothing 
remains but the large, infundibuliform spur, which is entire at the 
mouth, attenuate below, and contracted, then expanding into a deeply 
bifid or forcipate apex. Column broadly margined, nearly cucullate ; 
anther flat; apex much produced ` stipites free; gland elongate, 
rectangular ; rostellum broad, retuse. 
Upper Guinea. Cameroons: Primeval forests West of Buea, 4200 ft., 
Preuss, 
Said to be one of the smallest species of the genus, much resembling a small 
Oncidium iridifolium, Lindl., in habit. I have not seen it. 
50. L. dactyloceras, Reichb. € in Flora, 1865, 190. Plant about 
3 in. high. Stems short, stout, 1-1} in. long, 3-4-leaved. Leaves 
equitant, ensiform, very fleshy, subobtuse or scarcely apiculate, 14 in. 
long. Racemes capitate; rhachis very short. Bracts ovate or ovate- 
oblong, subobtuse or apiculate, 1-11 lin. long. Pedicels slender, 4-6 
lin. long. Sepalsand petals broadly oblong or suborbicular, membranous, 
subequal, 13-1? lin. long. Lip with a short, broad claw, 1 lin. long ; 
limb ovate, obtuse, crenulate, 14 lin. long ; spur narrowly infundibuli- 
form-oblong, slightly narrowed above the middle, 34-4 lin. long ; apex 
slightly broader, subcompressed and obscurely tridenticulate. Column 
stout, ł lin. long; rostellum subulate, deflexed into the spur, longer 
e the column ; pollinia with distinct, slender, curved stipites, 1 lin. 
ong. 
Lower Guinea. Angola: Pungo Andongo; near the large waterfall of the 
Ces Cuanza, between Quisonde and Condo, and in the Island of Calemba, Welwitsch, 
A very distinct species, much like a Saccolabium in the flowers, but the pollen is 
that of a Listrostachys. 
51. L. subulata, Reichb. f. ex Kränzl. in Engl. Jahrb. xxii. 28 
(in note). Stems slender, more or less curved, 3-12 in. long. Leaves 
terete, subulate, slender, acute, 14-5 in. long; sheaths transversely 
rugose. Bracts ovate, subobtuse, 2 lin. long. Pedicels 14 lin. long. 
Flowers few and fasciculate or solitary, white. Sepals elliptic-oblong; 
subobtuse, 1} lin. long. Petals lanceolate-oblong, subobtuse, as long as 
the sepals, Lip broadly ovate, concave, subobtuse or apiculate, 2 lin. 
long; spur falcate-incurved, subclavate, 2 lin. long. Column very short ; 
pollinia subsessile, separately attached to a broad gland.—Angrecum 
subulatum, Lindl. in Hook. Comp. Bot. Mag. ii. 206. 
Upper Guinea. Sierra Leone: Samu, on old trees in mangrove swamps, Scott- 
Elliot, 4334! and without precise locality, Afzelius ! Loddiges! Niger Delta: Nun 
