110 CXXXIII. ORCHIDEE (ROLFE). [ Polystachya. 
long. Dorsal sepal triangular-ovate, acute, 2$ lin. long; lateral 
triangular-ovate, acuminate, carinate. Petals subspathulate-elliptic, 
acute, 2} lin. long. Lip trilobed, cuneate-unguiculate ; side lobes 
semiovate, obtuse, short ; front lobe ovate, apiculate; disc furfuraceous, 
with a thick fleshy callus between the side lobes. Column stout, 2 lin. 
long. Chin triangular-oblong, obtuse, 14 lin. long.—Lindl. Gen. & Sp. 
Orch. 73; S. Moore in Baker, Fl. Maurit. 361. Polystachya cultriformis, 
Spreng. Syst. Veg. ili. 742; Kriinzl. in Engl. Pü Ost-Afr. ©. 155. 
Dendrobium cultriforme, Thou. Orch. Iles Afr. t. 87. 
Upper Guinea. Cameroons: Buea, 3100 ft., Preuss, 1009! 
Mozamb. Dist. German East Africa: Usambara; Silai and Mbaludorf, 
6000 ft. (ex Krdnzlin), Kilimanjaro, Marangu, 6500 ft., Volkens, 2082! 
A specimen from Mt. Kilimanjaro, higher slopes to 10,000 ft. above Marangu, 
Taylor! is apparently the same species. 
Also from Mauritius, Madagascar, and Bourbon. 
8. P. gracilenta, Kränzl. in Engl. Jahrb. xix. 251. Plant 16-20 
in. high. Stem very slender, shining, l-leaved. Leaves linear, longer 
than the raceme. Scapes slender, with a few sheaths; panicles short 
and congested, 14-24 in. high; branches ancipitous; inflorescence 
entirely glabrous. Bracts minute, triangular, acute, much longer than 
the ovary. Dorsal sepal ligulate, obtuse; lateral triangular, obtuse. 
Petals linear-spathulate, obtuse, about as long as the sepals. Lip much 
curved, complicate; side lobes semiobovate, roundish, very small; front 
lobe oblong, short, obtuse; callus rugulose, on upper third of lip to 
the apex. Chin conical, obtuse, lightly curved.—Krinzl. in Engl. Pü. 
Ost-Afr. C. 155. 
Nile Land, British East Africa: Ruwenzori, 8200 ft., Stuhlmann, 2334. 
Allied to P. cultrata, Lindl, The author describes the material as deficient, and 
seems doubtful whether this species is distinct from the preceding one, though the 
flowers are described as twice as large. I have not seen it. 
A specimen from Butagu, Ruwenzori, 8000 ft., Scott- Elliot, 8050! is apparently 
allied to this species. 
9. P. tenuissima, Krdnzl. in Engl. Jahrb. xix. 250. Stems very 
slender, 4—1 lin. broad, 1-leaved. Leaves elongate-linear, acuminate, 
6-9 in, long, 4 lin. broad. Scapes slender, partly nodding, with a sheath 
at the base; panicles more or less secund ; branches distant ; rhachis and 
ovary smooth, Bracts very minute, triangular. Flowers only 4 lin. 
diam. Dorsal sepal ovate, obtuse; lateral broadly oblong or suborbi- 
cular, apiculate. Petals linear-oblong, obtuse, minute. Lip cuneate; 
side lobes oblong, obtuse, rather large ; front lobe scarcely larger, nearly 
orbicular; disc with a callus on the claw. Chin galeate, bifid at the 
apex. Capsule ovoid-oblong, shortly pedicellate, 21 lin. long. 
Upper Guinea. Cameroons: Yaunde, Zenker, 609! 
Remarkable for its long, very narrow leaves. 
10. P. laxiflora, Lindl, in Journ. Linn. Soc. vi. 129. Plant 
1-1} ft. high. Stems fairly stout, 3—4-leaved, not thickened at the 
