120 CXXXIII. ORCHIDEÆ (ROLFE). | Polystachya. 
38. P. Polychete, Kränzl. in Engl. Jahrb. xvii. 50. Plant 
6-9 in. high. Stems slightly thickened below, 4—5-leaved. Leaves 
oblong-linear, obtuse, 25—5 in. long, 3—5 lin. broad. Scapes pubescent ; 
racemes erect, simple, very dense. Bracts linear-setaceous from a 
slightly broader base, deflexed,.14—2 lin. long. Pedicels 1 lin. long. 
Flowers greenish-white. Dorsal sepal ovate, acute, ? lin. long ; lateral 
triangular-ovate, mucronate-acuminate. Petals linear, acute, 3—4 lin. 
long. Lip trilobed, 2 lin. long; side lobes rounded, auriculate ; front 
lobe ovate-lanceolate, acute; disc a little hairy. Column stout, $ lin. 
long. Chin saccate-oblong, obtuse, 2 lin. long. Capsule elliptical, 2 lin. 
long.—Krinzl. in Engl. Pf. Ost-Afr. C. 155. 
Upper Guinea. Cameroon Mountains, in the primeval forest, West of Buea, 
4200 ft., Preuss, 881. 
Mozamb. Dist. German East Africa: Bukoba, on Lake Victoria Nyanza, 
Stuhlmann ! 
Kranzlin identifies the Western and Eastern plants together. I have only seen 
the latter, from which the above description is taken, 
39. P. setifera, Lindl. in Journ. Linn. Soc. vi. 130. Stems short, 
slightly thickened below, 2—3-leaved. Leaves lanceolate or oblong- 
lanceolate, subobtuse, 3—7 in. long, 7-12 lin. broad. Scapes about 9 1n. 
long. Panicles small, with about 2 side branches, puberulous. Bracts 
setaceous-acuminate from a broader base, 1-2 lin. long. Pedicels ? lin. 
long. Flowers puberulous, dull purple. Dorsal sepal oblong-lanceolate, 
acuminate, 1} lin. long; lateral ovate-oblong, setaceous-acuminate, 
2 lin. long. Petals linear, acuminate, 1 lin. long. Lip subentire, ovate, 
subacuminate, 1} lin. long, submembranous, with a narrow, slender, 
central keel. Column stout, 4 lin. long. Chin saccate-oblong, obtuse, 
4 lin. long. 
Lower Guinea. Princes Island, Barter, 1984! 
Remarkable for the setaceous sepals and the thin, ovate lip. 
40. P. albo-violacea, Kränzl. in Engl. Jahrb. xvii. 50. Pseudo- 
bulbs approximate, ovate-oblong, 3-1 in, long, 2—3-leaved. Leaves 
linear or oblong-linear, obtuse, 14—3 in. long (or longer, fide Krénzlin), 
3 lin. broad. Scapes 4 in. long; racemes simple, puberulous. Bracts 
narrowly setaceous from a broader base, reflexed, 14 in. long. Pedicels 
1-1} lin. long. Dorsal sepal ovate, acute or apiculate, 2 lin. long; 
lateral triangular-ovate, acuminate, much larger than the dorsal. 
Petals linear, subacute, 3 lin. long. Lip trilobed, 1 lin. long; side lobes 
roundish-oblong or auriculate ; front lobe ovate-lanceolate, acute, longer 
than the side lobes; disc naked, but with a small callus between the 
side lobes. Column stout, } lin. long. Chin saccate-oblong, obtuse, 
1 lin. long. 
Upper Guinea. Cameroons: Barombi, on trees, Preuss, 298! 
41. P. coriscensis, Reichb. f. Otia Bot. Hamb. ii. 112. Plant 
3—5in. high. Stems very short, slightly thickened, 3-4-leaved. Leaves 
oblong or subspathulate-oblong, obtuse, 14-34 in. long, 3-6 lin. broad. 
