R22 i CXXXIII. ORCHIDEÆ (ROLFE). [Polystachya. 
There is a slender basal branch on the inflorescence, but the species has no affinity 
with the paniculate set. The name appears to be derived from the native name 
“ Shega. 
45. P. Beccarii, Reichb. f. in Martelli, Florul. Bogos. 80. 
Pseudobuibs cylindrical, slender, 1 in. long, 3-leaved, Leaves linear- 
lanceolate, 5 in. long, 2 lin. broad. Peduncles slender, 1 ft. long; 
rhachis very slightly puberulous, racemose. Bracts triangular, scarcely 
as long as the pedicel. Dorsal sepal acute ; lateral triangular, acute, 
broader than the dorsal. Petals ligulate, acute. Lip broadly clawed, 
trilobed; side lobes obtusely auriculate; front lobe ligulate, obtuse, 
with an ancipitous callus on the claw; disce slightly furfuraceous. 
Column very short. Chin angulate, dwarf. 
Nile Land. Eritrea: along the road from Keren to Massowa, near Maldi, 
Beccari. 
Only known to me from the original description. 
46. P. caduca, Reichb. f. Otia Bot. Hamb. ii. 110. Pseudobulbs 
ovoid, 4—6 lin. long, 2?—3-leaved. Leaves Jinear or oblong-linear, sub- 
acute or apiculate, 1-3 in. long, 2-3 lin. broad. Scapes 14-2 in, long, 
few-flowered, puberulous. Bracts ovate-lanceolate, acuminate, 14-2 lin. 
long. Pedicels 24 lin. long. Dorsal sepal ovate-oblong, concave, 24 lin. 
long; lateral obliquely triangular, acuminate. Petals lanceolate-oblong, 
acuminate, 2} lin. long. Lip unguiculate, 3 lin. long, entire ; limb ovate, 
acuminate, slightly undulate, puberulous, with a transverse callus near 
the base. Column stout, L lin. long. Chin oblong, obtuse, 24 lin. long. 
Capsule oblong, 4 lin. long. 
Nile Land. Abyssinia, 8200 ft., on tree stems, Schimper, 1159 ! 
47. P. expansa, Ridl. in Bolet. Soc. Brot. v. 198. Pseudobulbs 
conical,. 14 in. long, 14 in. thick at the base, 2-leaved. Leaves 
lanceolate-lorate, obtuse, 6 in. long, 4 in. broad, the upper shorter. 
Scapes stoutish; racemes many-flowered; rhachis stout, pubescent. 
Flowers 4 in. diam., resupinate, expanded. Braçts cupuliform, short, 
apiculate. Dorsal sepal obovate, obtuse, apiculate; lateral broadly 
oblong-ovate, obtuse, shortly mucronate, widely spreading. Petals 
oblong, truncate, shorter than the sepals. Lip entire, recurved, 
sigmoid-oblong, dilated at the apex, abruptly truncate, with a tooth- 
like, appressed, acute callus at the base, pruinose nearly all over. 
Column short. 
Upper Guinea. Sierra Leone, without precise locality, Wilford ! 
Lower Guinea. St. Thomas: Angolares, Quintas! near Lagoa Amelia and 
S. Pedro, 3900 ft., Moller ! 
48. P. angularis, Reichb. f. in Flora, 1867, 114. Plant 6 in. 
high. Pseudobulbs 2-4-leaved, ovate-oblong, 9 lin. long. Leaves 
oblong or linear-oblong, acute, 3-34 in. long, 6-7 lin. broad. Scapes 
racemose, puberulous, few-flowered, 1 in. long. Bracts triangular- 
acuminate, {~1} lin. long. Pedicels hairy, longer than the bracts, 
