160 CXXXIII. ORCHIDEX (ROLFE). [ Listrostachys. 
longer than the lower. Racemes numerous, sometimes a little fas- 
cicled, slender, many-flowered, 3—6 in. long. Bracts ovate, amplexi- 
caul, obtuse, 1-14 lin. long. Sepals and petals lanceolate, acuminate, 
subequal, 3-4 lin. long. Lip obovate, cuspidate, as long as the sepals 
but broader; margin minutely fimbriate ; spur pendulous, 4 lin. long, 
slender, a little stouter near the apex, subacute. Column stout ; 
stipites slender ; pollinia obovate ` gland rounded.—Angracum acutum, 
Ridl. in Bolet. Soe, Brot. v. 199, t. C. fig. b. 
Lower Guinea. St. Thomas, Nova Moka, 2200 feet., Quintas, 3! 
Allied to L. ashantensis, Reich. f., but differs from all its allies in the shape and 
details of the lip. 
23. L. subclavata, Rolfe. Plant caulescent. Leaves sessile, oblong, 
4 in. long, 1} in. broad; base oblique, cordate on one side; apex 
unequally and obtusely bilobed. Racemes a little longer than the 
leaves, 16—20-flowered. Bracts minute. Pedicels 3 lin. long. Sepals 
lanceolate, acute. Petals similar to but a little shorter than the sepals. 
Lip broadly elliptic-ovate, acute, 3 lin. long; margin denticulate ; 
spur subclavate, 3 lin. long. Column short and stout.—Angrecum 
subclavatum, Rolfe in Bolet. Soc. Brot. ix. 140. 
Lower Guinea. St. Thomas, Quintas. ! 
Allied to L. ashantensis, Reichb. f. The flowers are in a young state. 
24. L. bidens, Rolfe. Stems long and climbing, with strong 
roots. Leaves oblong or ovate-oblong, obliquely and unequally bilobed, 
with subacute or obtuse lobes, 24-4} in. long, 3-1? in. broad. Racemes 
slender, 34-64 in. long, many-flowered. Bracts broadly triangular. 
ovate, obtuse, 4-4 lin. long. Pedicels 14-2 lin. long. Flowers white. 
Sepals lanceolate or elliptic-oblong, acute or subobtuse, 2 lin. long. 
Petals a little smaller than the sepals. Lip broadly oblong or quadrate- 
oblong, shortly trilobed at the apex, 24-23 lin. long ; side lobes rounded; 
front lobe cuspidate and smaller ; spur about as long as the lip, clavate 
or subclavate. Column stout, 4 lin. long.—Limodorwm bidens, Afzel. 
ex Sw. in Vet. Acad. Handl. Stockh. 1800, 243 (name only); Pers. Syn- 
ii. 521. 
Upper Guinea. Sierra Leone: near Wilberforce, 250 ft., on rocky banks by 
stream side, Johnston, 101! and without locality, Afzelius! Gold Coast: Cape Coast 
Castle, Vogel! Cameroons: Barombi, Preuss,335! Bipinde, Zenker, 1062! Efulen, 
Bates, 354! 
25. L. monodon, Reichb. f. in Walp. Ann. vi. 908. Stems not 
seen. Leaves ovate-oblong, shortly and obliquely bilobed, 3 in. long. 
1 in. broad. Racemes 3 in. long, many-flowered. Bracts broadly 
ovate, apiculate, amplexicaul, 4 lin. long. Pedicels 2 lin. long. Flowers 
reddish. Sepals and petals ovate-oblong, subacute, 2 lin. long. Lip 
suborbicular, subconcaye, 2 lin. long, with a short, blunt tooth near the 
base; spur slightly curved, subclavate, 3 lin. long. Column stout, 
3 lin. long; pollinia on distinct, slender stipites ` rostellum subulate, 
