ORCHIDACE.E 



longse, 4 mm. latae, ovatse, obtusas, conduplicatee. Sepala lateralia 



lanceolata, acuta, 3-nervia, 5 mm. longa, 3 mm. lata. Seimlum 



dorsale oblongi-lanceolatum, vel oblongi-ellipticum, acutum, 



3-nervium, 6 mm. longum, 2.75 mm. latum. Petala elliptica, vel 



suborbiculata, marginem versus erosula, 4.5 mm. longa, 3 mm. 



lata. Labellum 3-lobatum, 5.5 mm. latum; lobi later ales, 2.5 mm. 



longi, valde reflexi, acuti; lohus intermedius tridentatus, dens 



medius lateralibus major, 0.75 mm. longus; calli in basi labelli. 



Columna crassa, cucullo circa androclinium crenulato, columnas 



D. anfracti similis. 



Philippine Islands: At 4000 ft. altitude, Province of Benguet, Luzon, 

 July, 1907, Major E. A. Mearns (no. 4311). Type in herb. Bureau of Sci- 

 ence, Manila. 



Dendrochilum anfractoides is clearly allied to D. anfractum 

 (Ames) Pfitz., as the specific name implies. It differs consider- 

 ably, however, from Z>. anfractum in habit, especially in the re- 

 lative length of the peduncle and leaves, and in the rhachis, 

 which is less conspicuously zigzag. It also differs from D. anfrac- 

 tum in the labellum, which is less rounded at the base and dis- 

 tinctly tridentate at the apex of the middle lobe. Near the base 

 of the labellum are two fleshy calli transversely situated, which 

 are linear in conformation rather than papilla-like as in D. an- 

 fractum; between these calli in the sac or depression of the 

 labellum are other calli or wart-like excrescences which vary in 

 size and in number. Regarding these supernumerary calli, it must 

 be said that they are not present in all of the flowers examined 

 and are not of diacritical worth. The column of Z). anfractoides 

 is fleshy, very thick, 2.5 mm. long, with the base of the anther 

 concealed by the crenate or crenulate terminal wing, and with 

 the rostellar protuberance conspicuous and projecting in front. 



It is unfortunate that both Z). anfractum and Z>. anfractoides 



[ 14] 



