184 CXXXIII. ORCHIDEA (ROLFE). [Hetæria. 
petiolate, ovate or lanceolate, membranous. Flowers small, shortly 
pedicellate, arranged in lax racemes. Bracts small. 
A genus of abont 15 species, ranging from India to Australia, with a single Tropical 
African representative. 
1. H. Mannii, Benth. ex Durand & Schinz, Conspect. Fl. Afr. v. 57. 
Plant about 14 ft. high; stem creeping at the base, with stout roots. 
Leaves petiolate; limb elliptical or elliptic-lanceolate, acuminate. 
21—4 in. long, 3-1} in. broad; petioles 1-1} in. long, expanded at the 
base into a large, ovate-oblong sheath. Scapes 6-9 in. long; racemes 
puberulous, many-flowered. Bracts lanceolate, very acuminate, 3—5 lin. 
long. Pedicels 4 lin. long, pubescent. Dorsal sepal ovate-oblong, 
obtuse, 14 lin. long; lateral broadly ovate, obtuse, 1} lin. long. Petals 
linear, obtuse, 1 lin. long. Lip superior, 14 lin. long, broadly saccate 
at the base; apex divided into 2, recurved, oblong, obtuse, slightly 
velvety lobes, ? lin. long ; sac with a narrow, longitudinal keel, and a 
pair of small, rounded calli near the base. Column stout, somewhat 
gibbous in front. Stigmas lateral— Ramphidia Manmnii, Reichb. f. Otia 
Bot. Hamb. ii. 109. 
Upper Guinea. Cameroon River, Mann, 2131! 
25. PLATYLEPIS, A. Rich., Benth. et Hook. f. Gen. Pl. iii. 604. 
Sepals subequal, narrow, free, connivent round the column; lateral 
united at the base into a very short chin. Petals narrow, slightly 
cohering with the dorsal sepal into a hood. Lip sessile at the base of 
the column, erect, channelled, broadly ventricose at the base, cohering 
with the margins of the column; limb very little dilated, shorter than 
the sepals. Column elongated, subterete; clinandrium oblong, erect 
behind the rostellum. Anther erect, acuminate, as long as the rostellum ; 
cells distinct ; pollinia sectile or granular, adhering to the lobes of the 
rostellum. Stigma broad, papillose; rostellum erect, bilobed, with 
lanceolate, acuminate lobes. Capsules oblong, shortly contracted at the 
apex.—Terrestrial herbs, with creeping rhizomes, and ascending leafy 
stems. Leaves petiolate, ovate or ovate-lanceolate, membranous. 
Flowers narrow, shortly pedicelled, arranged in dense spikes. Bracts 
ovate. 
A genus of 4 species, natives of the Mascarene Islands, with the following exception. 
1. P. glandulosa, Reichb. f. in Linnea, xli. 62. Plant 1-1} ft. 
high; stem creeping at the base. Leaves many, petiolate ; limb 
elliptic-ovate, shortly acuminate, 2-34 in. long, 1-2 in. broad ; petioles 
14-1} in. long, broader and sheathing at the base. Scapes 6-10 in. 
long; racemes dense, many-flowered, 14-5 in. long. Bracts broadly 
ovate, concave, acute, glandular-villous, 24-34 lin. long. Flowers sub- 
glabrous, brownish or greenish-yellow. Pedicels 2 lin. long. Dorsal 
sepal erect, ovate-oblong, subobtuse or apiculate, 3—34 lin. long ; lateral 
oblong, apiculate, reflexed, 3-34 lin. long. Petals subspathulate, 
narrower than the dorsal sepal, and united with it into a hood. Lip 
