182 CXXXIII. ORCHIDEÆ (ROLFE). [Zeuxine. 
channelled, trifid in front; side lobes obtriangular, slightly erose and 
crenulate at the sides; front lobe with a very minute apiculus. Column 
short. Arms of the rostellum narrowly obtriangular.—Monochilus 
tetrapterus, Reichb. f. Otia Bot. Hamb. ii. 110. 
Lower Guinea. Gaboon: Sierra del Crystal, Mann, 1701! 
The flowers are in such bad condition that I have had to rely almost entirely upon 
Reichenbach’s description. 
4, Z. Batesii, Rolfe. Plant about 1 ft. high; stem with a long 
creeping base. Leaves shortly petiolate, broadly elliptical or obovate- 
elliptical, shortly acuminate, 24-2? in. long, 12-16 lin. broad; petioles 
ł in. long. Scapes 6-8 in. long; racemes many-flowered, pubescent. 
Bracts narrowly lanceolate, setaceous-acuminate, 4—6 lin. long. Pedicels 
3 lin. long. Flowers white. Sepals ovate-oblong, obtuse; lateral 
34 lin. long; dorsal rather smaller than the lateral. Petals filiform, 
34 lin. long, cohering with the margins of the dorsal sepal. Lip ungui- 
culate, divaricately bilobed ; claw 2 lin. long, broader and very concave 
below ; lobes obovate-oblong, very obtuse or crenulate, 2 lin. long, with 
a narrowed base; calli 2, linear, near the base of the lip. Column 
short; arms subspathulate-linear, 1-14 lin. long. 
Upper Guinea. Cameroons: Efulen, Bates, 299! 
Lower Guinea. Gaboon : Como River, Bates, 463! 
23. CHEIROSTYLIS, Blume; Benth. et Hook, f. Gen. PI. iii. 600. 
Sepals membranous, united to the middle into a tube, or rarely free, 
equal or the lateral extended into a short chin. Petals adnate to 
the dorsal sepal, sometimes scarcely distinguishable from it. Lip erect 
from the base of the column, narrow, channelled, with two calli at the 
base inside; apex dilated into a bilobed, often fimbriate limb. Column 
short, extended at the apex into two narrow erect arms or appendages, 
as long as the rostellum; clinandrium short, continuous at the base 
with the arms of the column and margin of the rostellum. Anther 
erect, acuminate; cells shortly separated at the base; pollinia sectile, 
affixed to a linear-cuneate, flat stipes with an oblong gland, descending 
behind the rostellum. Stigmas 2, lateral; rostellum erect, acuminate, 
bifid after the removal of the pollinia. Capsule obovoid or oblong.— 
Small terrestrial herbs, often very slender, with creeping rhizomes, an 
simple, ascending or erect, leafy stems. Leaves petiolate, ovate Or 
lanceolate, membranous. Flowers small or medium-sized, shortly pedi- 
cellate, arranged in loose spikes or racemes. Bracts small. 
A genus of about 12 species, mostly Indian and Malayan, with two Chinese repre 
sentatives, beside the two following ones. 
Sepals united into a tube. Leaves broadly ovate . . 1. C. lepida. 
Lateral sepals free. Leaves ovate-oblong . e . 2. C. heterosepala, 
1. C. lepida, Rolfe. Plant 6-9 in. high; stem creeping. Leaves 
numerous, petiolate; limb broadly ovate, shortly acuminate, 3-1 in. 
long; petioles 4-7 lin. long, with a large lax sheath at the base. Scapes 
