ORCHIDACEJE 



cies of Dendrochilum are recognized. The Philippine representa- 

 tives may be distributed into four well-differentiated sections, as 

 follows : 



A. Stelidia of the column obsolete. 



a. Peduncles terminal. § Acoridium, 44 species. 



b. Scape lateral. § Pseudacoridium, 1 species. 



B. Stelidia of the column well developed, rarely rudimentary. 



a. Scape lateral. § Eu-Dendrochilum, 1 species. 



b. Peduncle terminal. § Platyclinis, 23 species. 



Although § Acoridium is the largest section, only three species 

 referable to it were known prior to the American occupation of 

 the Philippines. Dendrochilum Mer?~illii, from Luzon, and several 

 species not known to inhabit the Philippines, such as D. Kingii 

 (Hook, f.) Pfitz., are characterized by the lack of stelidia on the 

 column, and yet show closer relationship with § Platyclinis than 

 with § Acoridium. These species constitute the § Aphanostelidion 

 proposed by Pfitzer. 



1. Dendrochilum (§ Acoridium) affined /m&s'Orchidace^e 2:95. 

 Luzon. 



2. Dendrochilum (§ Acoridium) anfractoides Ames Orchida- 

 ce,e 3 : 13, t. 28. 



Luzon. 



3. Dendrochilum (§ Acoridium) anfractum Pfitz. in Engler's 

 Das Pflanzenreich Ccelog. 118; Ames Orchidace^e 2 :91. 



Luzon. 



4. Dendrochilum (§ Platyclinis) arachnites Reichb.f. in Gard. 

 Chron. (1882) 51:256. 



Mindoro, Luzon, Mindanao. 



5. Dendrochilum (§ Acoridium) auriculare A mes in Phil. Journ. 

 Sci. 4 : 595. 



Luzon. 



[55] 



