596 G. King & R. Pantling. — Neiv Indo-Malayan Orchids. [No. 3, 



•5 to *75 in. Racemes slender, glabrous, pendulous, bearing 4 to 9 

 flowers, "8 in. in diam. ; floral bract minute. Sepals oblong, blunt, 

 the petals smaller and subfalcate, all reflexed on the slender stalked 

 ovary. Lip adnate to the base of the column ; the hypochile directed 

 backwards almost parallel to the ovary forming an infundibuliform 

 fleshy spur, its mouth with shallow side-lobes having acute apices 

 directed forwards ; the spur with a large 2-ribbed callus at its mouth 

 just below the column septate at its extremity, sub-quadrate, its base 

 produced into small auricles, its apex blunt but with a minute apiculus, 

 its upper surface with a mesial triangular thickening. Column long ; 

 rostellum very long and pointed. Anther depressed ; pollinia 4, plano- 

 convex, attached by pairs to a very long thin caudicle bearing a small 

 broadly ovate gland on the outer side. 



Assam ; on the Dikku river, elevation 1000 feet. Dr. G. Watt 

 field No. 542. 



The genus Stereochilus was founded by Lindley to receive a species from Khasia 

 and Burma which he named 8. hirtus. He considered the genus to be allied to 

 Camarotis. Both these genera were reduced to Sarcochilus, R. Br., by Mr. Bentham 

 (Gen. Plantar. Ill, 576). Sir Joseph Hooker, in treating the genus Sarcochilus, as 

 Mr. Bentham understood it, (enlarged as it had been by the absorption, besides the 

 two just mentioned, of the genera Pteroceras, Micropera, Chiloschista, Fornicaria, 

 Cylindrochilus and Caculla), remarks "a polymorphus genus no donbtto be dismem- 

 bered when better known." Encouraged by this remark, we are led to re-establish 

 Stereochilus, relying as head-marks for the genns on the structure of the lip, on 

 the very long beak of the rostellum, and on the length of the caudicle of the 

 anticous pollinia. 



Cleisostoma. tenuicaule, n. spec. Stems Rlender, pendulous, about 

 12 in. long. Leaves thickly coriaceous, somewhat twisted, borne about 

 half an inch apart on the younger part of the stem, linear-oblong ; 

 their apices acute, not notched, slightly recurved. Flowers solitary, leaf- 

 opposed, '5 in. across, on a slender pedicel ; floral bract very minute. 

 Sepals and petals fleshy, subequal, spreading, oblong-oblanceolate, blunt ; 

 the lateral sepals slightly falcate. Lip fleshy, equalling or slightly exceed- 

 ing the lateral sepals in length, narrowly oblong, tapering to the acute 

 emarginate apex, deflexed from near the base, 5-lobed ; the lowest pair 

 of lobes near the base small and tooth-like, blunt; the pair at the base 

 of the terminal lobe larger, conical, fleshy, pointing outwards ; disc 

 between the teeth sparsely pubescent ; spur about one-third of the 

 length of the stalked ovary and about as long as the sepals, horizontal, 

 cylindric, tapering somewhat to the apex. Column short, bearing a linear 

 callus on its anterior surface, curved upwards and hairy. Anther broad ; 

 pollinia 4 in 2 pairs, each pair globose and attached to a narrow caudicle 

 with inflexed margins in its upper part ; gland oblong, half as long as 

 the caudicle, its upper end truncate. 



