292 CXXXIII. ORCHIDE® (ROLFE). [Disperis. 
4 lin. long; lateral sepals spreading, obliquely obovate, subapiculate, 
4 lin. long, with a conical sac, 4 lin. long, near the inner margin. 
Petals much curved, united to the margins of the dorsal sepal, auricu- 
late at the base, much constricted below the triangular, acute, inflexed 
apex. Lip with a slender claw, 3 lin. long; basal sixth adnate; limb 
sharply reflexed, lanceolate, subobtuse, 14 lin. long, with somewhat 
inflexed sides, keeled behind; appendage situated above the base of the 
limb, tooth-like, 4 lin. long, dilated at the base, with penicillate margin, 
deflexed. Column very stout, 1 lin. long; arms of rostellum subspathu- 
late-linear, 4 lin. long. 
Upper Guinea. Cameroons: Buea, 3600~3900 ft., Preuss, 609! 
9. D. nemorosa, Rendle in Journ. Bot. 1895, 297. Stem slender, 
5-8 in. high, 2-leaved, with an acute sheath near. the base. Leaves 
opposite, sessile, ovate, acute or acuminate, 1 in. long, 9—10 lin. broad. 
Raceme very short, 2-flowered. Bracts ovate or ovate-lanceolate, acu- 
minate. Pedicels 6-8 lin. long. Dorsal sepal almost reduced to a 
slender spur, 5 lin. long; lateral spreading, free, obliquely obovate- 
elliptic, obtuse, 4 lin. long, with a conical sac 4 lin. long on the 
inner margin. Petals united to the margins of the dorsal sepal, auri- 
culate at the base ; the free apex broadly rounded. Lip with a slender, 
flattened claw, 44 lin. long; adnate base very short; limb sharply 
reflexed, linear, 1 lin, long; appendage 44 lin. long, directed to the 
apex of the spur, linear to near the apex, then cuneately dilated, and 
terminating in a pair of spreading, oblong, obtuse lobes, 4 lin. long. 
Column very stout, 4 lin. long; rostellum bilobed, with oblong, curved 
arms, $ lin. long. . 
Nile Land. British East Africa: Ruwenzori ; at Wimi, 7000-8000 ft., in deep 
forest, Scott-Elliot, 7944! 
10. D. Anthoceros, Beicht, f. Otia Bot. Hamb. ii. 103. Tuber 
ovoid-oblong, 6-8 lin. long. Stem stout, 5-9 in. high, 2-leaved, with 
an obtuse sheath near the base. Leaves opposite, subsessile, cordate- 
ovate, subacute or apiculate, ł}—14 in. long, 5-12 lin. broad. Racemes 
2- or 1-flowered. Bracts ovate, subacute or acuminate, 3—6 lin. long. 
Pedicels 5-8 lin. long. Flowers yellow-green. Dorsal sepal almost 
reduced to an elongate-conical spur, 6-8 lin. long; lateral spreading, 
obliquely obovate, apiculate, 4 lin. long, united to about the middle, 
with a conical sac 3? lin. long on the inner margin. Petals faleate- 
oblong, united to the margins of the dorsal sepal ; apex broadly rounded ; 
base auriculate. Lip elongate-linear to the apex, 44 lin. long; adnate 
base very short ; apex slightly toothed and partially reflexed, without 4 
free limb and appendage, as in the other tropical African species. 
Column very stout, 1 lin. long; rostellum bilobed, with linear-oblong 
arms, } lin. long. 
Nile Land. Abyssinia: Begemeder; River Reb, 6500 ft., Schimper, 1295! 
Also found in Natal, 
