ORCHIDS OF MADAGASCAR. 501 



saepius brevioribus ; sepalo postico cucullato obtuso ; petalis bre- 

 vioribus ovatis obtusis, cum illis galeam efformantibus sed liberis ; 

 sepalis lateralibus majoribus ovatis obtusis falcatis ; labello lobo 

 medio lanceolato obtuso, lobis lateralibus vix distinctis reflexis, 

 basi ad columnam adnatis ; calcare pendulo basi angustato, apice 

 subclavato, dimidium ovarii superante ; lobis rostelli lateralibus 

 cornutie obtusis suberectis, medio multo breviore; polliniis parvis 

 subglobosis; caudicula tenerriina loDgiuscula, glandula minima 

 ovali ; ovario vix scabro basi et apice angustato ; capsula brevi 

 oblonga glabra subeylindrica. 



Imeriiia, Deans Cowan ! ; ibidem in marginibus oryzetorum, 

 Jan. 1881, Hildebrandt no. 3820 ! in Herb. Brit. Mus. ; Li/all 

 no. 308 !, mixed witb B. gracilis, Lindl., Herb. Kew. 



This species is easily distinguished from the other two by its 

 smaller flowers arranged in a more compact spike, and the short 

 up-curved horn-like rostellar lobes. The plant is, on the whole, 

 a good deal smaller and more slender than the other two species, 

 being from 6 inches, to nearly 1 foot in height. The leaves are 

 fewer, the radical ones linear and grassy, those on the stem some- 

 what similar, but with a rather long sheath. The petals and dorsal 

 sepals form, as in the rest of the genus, a galea ; but they are not 

 connate as is the case in B. gracilis. The petals are shorter than 

 the posticous sepal. The lateral sepals resemble iu shape those 

 of the other species o£ the genus, but are a good deal larger than 

 the petals and posticous sepal. The lip has a narrow middle lobe, 

 up-curved in the living state. The lateral lobes, which are narrow, 

 and hardly to be distinguished from the rest of the lip when it is 

 spread out, are adnate to the column as in the rest of the genus, 

 but are longer, and, being reflected, form a channel to the entrance 

 of the spur for nearly half the length of the entire lip. The 

 lateral lobes of the rostellum are much shorter than those of the 

 other species, horn-shaped and curved-up in front of the anther ; 

 the median lobe is shorter and blunt. The caudicles of the pale 

 orange pollinia are proportionally shorter than in the other two 

 species, but longer than might be expected from the size of the 

 flower. The capsule is quite glabrous, smaller and thicker in 

 proportion to its length than that of B. longifolia, Lindl. The 

 habit of the plant is much like that of Habenaria (Gymnadenia) 

 conopsca. 



BicoRNELn.v lonoifolia, Lindley, Gen. Sf Sp. Orch. PI. p. 335. 



B. radicibus copiosis cylindricis tenuibus ; caule ereeto elato, 



