104 CXXXIII. ORCHIDEH (ROLFE). [ Polystachya. ' 
Leaves 2-3 lin. broad ; inflorescence 
few-flowered . r 3. P. bifida. 
Chin of the flowers not or very slightly 
exceeding the dorsal sepal. 
Lip sessile, with small basal side lobes. 
Leaves linear-lanceolate; inflores- 
cence simple or slightly branched 4. P. ensifolia. 
Leaves lanceolate; inflorescence dense, 
with several branches. , 
Side lobes of lip triangular, acute 5. P. pyramidalis. 
Side lobes of lip ovate-oblong, sub- 
obtuse . 6. P. rhodoptera. 
Lip more or less unguiculate ; ie lobes, 
when present, not basal. 
*Inflorescence paniculate, except in 12 
and 13; bracts acute from a 
broad base; flowers 3-6 lin. 
long (plants turning black in 
drying). 
Leaves solitary. 
Leaves oblong s 7. P. cultrata. 
Leaves linear (Eastern species) 8. P. gracilenta. 
Leaves very narrow, 4 lin. 
broad. (Western species) . 9. P. tenuissima. 
Leaves two or more. 
Flowers about 5-6 lin. long (see 
also 19). 
Inflorescence a lax, many- 
flowered, panicle. 
Lip unguiculate, trilobed . 10. P. laxiflora. 
Lip rhomboid, obtuse- 
angled. . . 11. P. dendrobiiflora. 
Inflorescence about 4-flowered 12. P. albescens. 
Flowers under 4 lin. long. 
Inflorescence simple . , 13. P. nigrescens. 
Inflorescence branched, _ 
Leaves 2-2} lin. long . 14. P. Rendlei. 
Leaves 3—5 in. long. 
Side lobes of lip rounded 15. P. Krenzlinii. 
Side lobes of lip angular, 
truncate in front . 16. P. imbricata, 
** Inflorescence paniculate except some- 
times in 17 and 30; bracts 
acute or acuminate from a broad 
base; flowers lł—4 lin. long, 
except in 17 (plants not turn- 
ing black in drying). 
Flowers 6 lin. long . S hie P. Rive. 
Flowers 1—4 lin. long. 
Chin more or less obtusely 
conical. 
+Leaves more or less expanded 
and flat. 
Lip entire ° < , 18. P. paniculata. 
Lip trilobed. 
