182 cxxxiii. ORCHiDE^ (rolfe). [Zeuxi7ie. 



channelled, trifid in front ; side lobes obtriangular, slightly erose and 

 crenulate at the sides ; front lobe with a very minute apicul us. Column 

 short. Arms of the rostellum narrowly obtriangular. — Monochilus 

 tetraplerus, Reichb. f. Otia Bot. Hamb. ii. 110. 



^o-wer 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, ^J-^f in. long, 12-16 lin. broad; petioles 

 ^ in. long. Scapes Q-'^ in. long; racemes many-flowered, pubescent. 

 Bracts narrowly lanceolate, setaceous-acuminate, 4-6 lin. long. Pedicels 

 ;> lin. long. Flowers white. Sepals ovate-oblong, obtuse ; lateral 

 oA lin. long; dorsal rather smaller than the lateral. Petals filiform, 

 ?>l lin, long, cohering with the margins of the dorsal sepal. Lip ungui- 

 eulate, 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, 1-1 J lin. long. 



Upper Guinea, Cameroons : Efulen, Bates, 299 ! 



2«ower 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, channeljed, 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, and 

 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 tu1)e. Leaves broadly ovate . . 1. C. lepida. 



Lateral sepals free. Leaves ovate-oblong . . . 2. C heterosepala, 



1 , C. lepida, Rolfe. Plant 6-9 in. high ; stem creeping. Leaves 

 numerous, petiolate ; limb broadly ovate, shortly acuminate, J-1 in. 

 long ; petioles 4-7 lin. long, witn a large lax sheath at the base. Scapes 



