Polystachya. | CXXXIII. ORCHIDEE (ROLFE). 111 
base. Leaves lanceolate-oblong, shortly acuminate, subobtuse, 4-8 in. 
long, $-1} in. broad. Panicle usually ample, 3-7 in. long. Bracts 
broadly triangular, shortly acuminate, 4—1 lin. long. Péedicels 3 lin. 
long. Flowers whitish, pale yellow, or pale pink. Dorsal sepal ovate- 
lanceolate, acute, concave, 4 lin. long; lateral triangular-ovate, acute or 
acuminate. Petals spathulate-lanceolate, apiculate, 3 lin. long. Lip 
broadly unguiculate, trilobed, 34 lin. long; side lobes semiovate, sub- 
obtuse; front lobe broad, ovate-semiorbicular, apiculate; dise sub- 
glabrous, with a broad approximately round callus near the base. 
Column stout, 14 lin. long. Chin saccate, obtuse, 3 lin. long.—P. gale- 
riculata, Reichb. f. Otia Bot. Hamb. ii. 111. 
Upper Guinea. Sierra Leone: Bafodeya and Freetown, Scott-Elliot, 5903! 
Lagos, Millen! Niger Delta: Nun River; on mangroves, Barter, 20126! Brass, 
Barter, 1055! Fernando Po, Mann, 437! 
Lower Guinea. Gaboon: Como River, Bates, 477! 
I cannot find any character by which to separate P. galericulata, Reichb. f. 
11. P. dendrobiiflora, Reichb. f. Otia Bot. Hamb. ii. 76. Pseudo- 
bulbs fusiform. Pedicels elongate, with a long, lanceolate, free sheath 
below, paniculate above ; branches racemose, 3—5-flowered. Flowers as 
large as in Dendrobium barbatum, Lindl. Sepals ligulate, acute. Petals 
a little narrower. Lip rhomboid, obtuse-angled; dise furfuraceous. 
Column angled near the stigma. Chin obtuse-—Durand E Schinz, 
Conspect. Fl. Afr. v. 34. 
Lower Guinea. Angola (ex Durand A Schinz). 
The author, in the original description, omits all reference to the native country 
and affinity, but it is apparently closely allied to the preceding species. I have not 
seen it. 
12. P. albescens, Ridl. in Bolet. Soc. Brot. v. 199. Stems slender, 
5 in. long, not thickened. Leaves narrow, lanceolate-linear, acuminate 
or acute, 4 in. long, 44 lin. broad. Scapes a little shorter than the 
longest leaves, flattened, short, about 4-flowered. Flowers as large as 
those of P. laxiflora, Lindl., nodding, greenish-white, with rose-coloured 
labellum. Bracts lanceolate, acuminate or acute, 2 lin. long. Pedicels 
5 lin. long, scaberulous. Dorsal sepal lanceolate, acute; lateral 
triangular, acute, glabrous. Petals spathulate, acute, a little shorter 
than the sepals. Lip entire, hastate, recurved, as long as the sepals, 
pubescent, with a linguiform, fleshy callus in the middle. Column 
stout, short. Chin gibbous. 
Lower Guinea. Island of St. Thomas: Peak of St. Thomas, about 7200 ft., 
Moller, 
Only known to me from the description, but said to be allied to P. rosea, Ridl. and 
P. galericulata, Beicht, f., and to turn black in drying. 
13. P. nigrescens, Rendle in Journ. Bot. 1895, 200. Plant about 
7-9 in. tall. Stems slender, elongate, about 3-5-leaved. Leaves linear 
or oblong-linear, subobtuse, 14-4 in. long, 3-4 lin. broad. Scapes sub- 
erect, 24-3 in. long, few-flowered. Bracts lanceolate-acuminate from a 
