ORCHIDACE.E 



complanatus. Folia disticha, valde coriacea, ± 1 dm. longa, usque 

 ad 2 cm. lata, ad apicem inaequaliter bilobata, ligulata, linearia vel 

 anguste lanceolata. Y^aginas foliorum arete adpressse, internodiis 

 aequilongis, caulem obtectge,±2 cm. longa?. Inflorescentias oppo- 

 sitifolia?,± 1.5 dm. longae, rigidae, paniculate. Pedunculus±8 cm. 

 longus, circiter 2 mm. in diametro, ascendens, folia eequantes vel 

 excedentes, rami panicula? ± 4 cm. longi, multiflori. Bracteaa inflo- 

 rescentias rigidae, squamiformes, acutaa, circiter 1 mm. longae. Se- 

 pala lateralia leviter carinata, oblonga, obtusa, margine involute, 

 ad apicem cucullata, 3 mm. longa, circiter 1.5 mm. lata. Sepalum 

 dorsale simile. Petala spathulato-lanceolata, subacuta, vix 3 mm. 

 longa, circiter 1 mm. lata supra medium. Labellum trilobatum, 

 lobi laterales triangulares, erecti, valde acuti; lobus medius ro- 

 tundato-triangularis, obtusus, carnosus, latior quam longior, cir- 

 citer 1 mm. longus. Saccus scrotiformis, valde obtusus, 2.5 mm. 

 longus, intus in pariete antico bicallosum, in pariete postico 

 callus bilobus in fauce sacci ; septatus, septo in carinam reducto. 

 Gynostemium carnosum, breve, pede subobsoleto. Pollinia 4, in 

 corpuscula 2 unita. 



Sarcanthus micranthus is related to S. paniculatus J. J. Smith, 

 and to S. racemifer Reichb. f. The habit of S. micranthusis more 

 slender, however, and the smaller flowers are in fewer branched 

 panicles than in S. racemifer. 



The callus on the posterior wall of the sac is scale-like and 



retuse rather than bilobed. The calli on the anterior wall near the 



base of the middle lobe are fleshy and somewhat elongated. On 



the middle of the lobe itself there are two folds of tissue which 



are diagonally situated, and which converge, but do not unite, near 



the tip of the middle lobe. The septum at the base of the sac is 



very weakly developed. In several flowers examined the calli of 



the sac were almost absent. 



[ 249 ] 



