116 CXXXIII. ORCHIDE (ROLFE). [Polystachya. 
lateral triangular-ovate, acute. Petals linear-lanceolatc, acute, 14 lin. 
long. Lip 2 lin. long, unguiculate, trilobed; side lobes oblong, acute, 
small; front lobe semiorbicular, crenulate, obtuse or retuse; disc 
glabrous with an acute keel. Column stout, 4 lin, long. Chin saccate- 
oblong, obtuse, 14 lin. long. 
Mozamb, Dist. Zanzibar, Kirk ! 
This is allied to the Natal P. similis, Reichb. f., but differs in having an acute 
keel to the lip. 
25. P. modesta, Reichb. f. in Flora, 1867, 114. Pseudobulbs 
ovate-oblong, thickened at the base, ł—1 in. long, 3-leaved. Leaves 
oblong, subobtuse, 3-34 in. long, 5-8 lin. broad. Pedicels smooth. 
Panicles slightly branched, dense, 4—2} in. long. Bractssmall. Flowers 
14 lin. long, yellow. Dorsal sepal ovate-oblong, acute, 1} lin. long; 
lateral triangular-ovate, acute. Petals linear-oblong, acute, 1} lin. long. 
Lip trifid in front; side lobes antrorse, obtuse; front lobe broader, 
crenulate; disc furfuraceous ; callus ancipitous at the base. Chin 4 lin. 
long. Capsule elliptical-oblong, 3} lin. long. 
Lower Guinea. Angola: Pungo Andongo; near Quisonde, on trunks of old 
trees in the primeval woods, very rare, Welwitsch, 675! 
Allied to P. nitidula, Reichb. f., but much smaller, The British Museum speci- 
men consists of a single flower and fruit, accompanied by a sketch. 
26. P. shirensis, Reichb. f. Otia Bot. Hamb. ii. 112. Stems 
dwarf, 5-leaved. Leaves linear-oblong, subobtuse, 21—44 in. long, 5-8 
lin. broad. Scapes 6 in. long. Panicle small, 14 in. long, with 2 very 
short branches. Bracts triangular-ovate, acute, } lin. long. Dorsal 
sepal ovate, obtuse, 3 lin. long; lateral triangular-ovate, obtuse, twice 
as large as the dorsal one. Petals oblong, obtuse, 3 lin. long. Lip (ex 
Reichenbach) cuneate, dilated, trilobed to the middle; side lobes semi- 
ovate, apiculate, flat, incumbent, larger than the front lobe; disc fur- 
furaceous, carinate towards the base. Column stout, 4 lin. long. Chin 
saccate-oblong, obtuse, } lin. long. Capsule elliptic-oblong, 3 lin. long. 
Mozamb. Dist. British Central Africa: Lower Valley of River Shire, Meller! 
The lip was imperfect in the single withered flower examined, which was taken 
from the apex of a nearly mature capsule on the type specimen. A plant collected at 
Madi by Speke and Grant, 715! is very similar, though apparently not identical. The 
plant cited by Krinzlin as P. shirensis is quite distinct. See P. Krenzlinit, Rolfe. 
27. P. bennettiana, Beicht, f. Otia Bot. Hamb. ii. 113. Stems 
fusiform, not pseudobulbous, 4-leaved. Leaves cuneate-ligulate, 5 in. 
long, 5-6 lin. broad; apex unequally acute. Racemes with a small 
branch at the base, few-flowered. Bracts triangular, minute. Pedicels 
obscurely puberulous. Flowers scattered. Dorsal sepal narrow ; lateral 
much broader, triangular. Petals lanceolate, acute ; base cuneate. Lip 
with a very short base, cuneate-dilated, trilobed; side lobes triangular 
front lobe extended, broader. Chin very short, conical. 
Wile Land. Abyssinia, Schimper ! 
Allied to P. caduca, Reichb. f., but larger, and with a differently shaped lip. 
