Listrostachys. | CXXXIII. ORCHIDE£ (ROLFE). 161 
decurved.—Angræcum monodon, Lindl. in Paxt. Fl. Gard. ii. 102, 
fig. 187 (not in Journ. Linn. Soe. vi. 135). 
Lower Guinea, Gaboon: cultivated specimen, Pescatore ! 
Only known from the original specimen. 
26. L. pertusa, Reichb. f. in Walp. Ann. vi. 908. Stems stout, 
short, 2-6 in. long, clothed with the persistent, imbricate leaf-bases. 
Leaves ligulate or linear-oblong, shortly and very unequally bilobed, 
4-8 in. long, 6—10 lin. broad. Racemes stout, erect or spreading, 6-9 in. 
long, dense-flowered almost to the base. Bracts ochreate, very short, 
alternate. Pedicels 1 lin. long. Flowers small, distichous, white, 
furfuraceous. Sepals broadly ovate, obtuse, 14-14 lin. long. Petals 
similar to but a little smaller than the sepals. Lip broadly unguiculate, 
suborbicular-obovate, obtuse or apiculate, slightly reflexed, 14-1} lin. 
long; spur stout, clavate, dorsally compressed, 14-2 lin. long. Column 
very stout, 1 lin. long; pollinia with a crescent-shaped gland, and 
2 clavate, flattened stipites, denticulate at the margins.—Angrecum 
pertusum, Lindl. in Hook. Comp. Bot. Mag. ii. 205; Journ. Linn. Soc. 
vi. 135; Bot. Mag. t. 4782. 
Upper Guinea, Sierra Leone: cultivated specimen, Loddiges! Lagos, 
Moloney ! Niger Delta: Brass, Barter, 1826! Nun River, Mann,524! Cameroons : 
Efulen, Bates, 395! 
27. L. clandestina, Rolfe. ‘‘Caulescent.” Leaves ensiform, 
recurved, thick, 7 in. long, 3—4 lin. broad, very obliquely bidentate, 
with the lower tooth 11 lin. below the upper. Spike horizontal, dense. 
Bracts ovate, coriaceous, rigid. Flowers furfuraceous; sepals and 
petals white ; lip green. Sepals broadly ovate-oblong, obtuse, concave, 
2 lin. long. Petals linear-oblong, obtuse, 2 lin. Jong. Lip trilobed, 
concave, 2 lin. long; side lobes ample, oblong, obtuse; front lobe ovate, 
apiculate, obscurely crenulate, concave; spur clavate, inflated at the 
apex, curved, 24 lin. long. Column stout, 14 lin. long; rostellum 
elongate, bipartite, lobes subulate, descending at the base, sharply 
inflexed at the middle, and then ascending.—Angrecum clandestinum, 
Lindl. in. Hook. Comp. Bot. Mag. ii. 206; Reichb. f. in Walp. Ann. 
vi. 906, 
Upper Guinea. Sierra Leone: cultivated specimen, Loddiges ! 
An imperfectly known species, apparently of this affinity, 
28. L. gabonensis, alt. Leaf linear-oblong, shortly, obtusely, 
and unequally bilobed, 5 in. long, 10 lin. broad. Raceme 6 in. long, 
dense, many-flowered. Bracts alternate, broadly tubular, nearly truncate 
or apiculate, 3? lin. long. Pedicels 1 lin. long. Lateral sepals broadly 
elliptic-oblong, obtuse, 1-11 lin. long; dorsal, and the petals, sub- 
orbicular, 1 lin. long. Lip suborbicular, emarginate, 1 lin. long; spur 
cylindrical, slightly narrower near the base, 34 lin. long. Column stout, 
lin. long. 
Lower Guinea. Gaboon: cultivated specimen ! 
Flowered in the Jardin des Plantes, Paris, in 1886. 
VOL. VII, M 
