Polystachya. | CXXXIII. ORCHIDEE (ROLFE). 115 
Fruiting specimens collected in Sierra Leone, on fig-trees in Freetown cemetery, 
Barter ! without locality, Scott-Elliot ! and Niger Delta : Brass River, Barter, 1856 ! 
the latter marked as having “ deep purple flowers,” apparently represent a closely allied 
species. A similar specimen from Lagos, Millen ! is also allied, but none of them are 
determinable in their present condition. 
22. P. Buchanani, Rolfe in Kew Bulletin, 1893, 335. Plant 
4-1} feet high. Stems short, slightly thickened, 2—4-leaved. Leaves 
lanceolate-oblong, subobtuse, 4-8 in. long, 3-13 in. broad. Scapes 
4-14 ft. long, much branched above; branches dense, many-flowered, 
puberulous. Bracts triangular-subulate, acuminate, recurved, 1-1} 
lin. long. Pedicels 23-3 lin. long. Flowers light yellow to green, 
with a faint trace of purple-brown near the margins of the sepals. 
Dorsal sepal ovate, acute, or apiculate, 11 lin. long; lateral triangular- 
ovate, apiculate, much larger than the dorsal. Petals spathulate-linear, 
subobtuse or apiculate, 1} lin. long. Lip trilobed, 14 lin. long; side 
lobes ovate-oblong, obtuse ; front lobe orbicular-ovate ; apex obtuse or 
emarginate, reflexed ; disc farinaceous-pubescent ; callus a linear, fleshy 
keel from the middle to near the base. Column stout, 1} lin. long. 
he saccate-oblong, obtuse, 1} lin. long. Capsule oblong, 6-8 lin. 
ong. 
Nile Land. British East Africa: Giryama Mountains, Taylor ! 
Mozamb, Dist. British Central Africa: cultivated specimens! 
Described from a cultivated plant sent from British Central Africa by Mr. J. 
Buchanan, C.M.G., to Mr. J. O’Brien, of Harrow-on-the-Hill. Originally flowered at 
Glasnevin in 1889. 
Taylor’s specimen is in fruit only, but I think it belongs to this species. 
23. P. rufinula, Reichb. f. in Gard. Chron. 1879, xi. 41. Pseudo- 
bulbs short, thickened at the base, 2-24 in. long, 3-leaved. Leaves 
lanceolate-oblong, subobtuse, 34—6 in. long, 3-1 in. broad. Scapes 6-8 
in. or more long, branched above or rarely simple, many-flowered ; 
branches slightly puberulous. Bracts subulate-lanceolate or ovate, 
acuminate, 1-2 lin. long. Pedicels 2-3 lin. long. Dorsal sepal ovate, 
apiculate, 14-2 lin. long ; lateral triangular-ovate, much larger. Petals 
linear, acute, 14 lin. long. Lip trilobed, 24-3 lin. long; side lobes 
roundish-oblong ; front lobe quadrate-suborbicular ; apex emarginate or 
shortly bilobed ` disc farinaceous-pubescent, with a central linear-oblong 
thickened callus. Column stout, 1 lin. long. Chin saccate-oblong, 
obtuse, 14-2 lin. long. Capsule elliptical-oblong, 6-7 lin, long.— 
Reichb. f. in Otia Bot. Hamb. ii. 76. 
Mozamb, Dist. Zanzibar, cultivated specimens ! 
Only known from garden specimens, which are said to have been sent home by 
Dr. Kirk. It originally flowered in the collection of Captain Hincks, in 1879. 
24. P. zanguebarica, Koltz, Plant 6 in. or more high. Leaves 
oblong-lanceolate, subobtuse, 5 in. long, 6-9 lin. broad. Scapes panicu- 
late, pedunculate, 6 in. long. Bracts triangular, acuminate, 1 lin. long ; 
Pedicels 3 lin. long. Dorsal sepal ovate, acute, concave, 14 lin. long; 
