596 



AMES. 



lobe broader than the laterals, middle lobe oblong, rounded, acute at the 

 apex, 1 mm long, 0.75 mm wide. At the base of each lateral lobe there 

 ifl a minute rounded callus. Column typical of the section. 



The flowers are fleshy and most difficult to dissect as the sepals and 

 petals break under very slight pressure. The labellum is thick and 

 has a conduplicate middle lobe. No comments by the collectors have been 

 made regarding the color of the Honors but in dried specimens those near 

 the base of the raceme are brownish with the labellum yellow, those near 

 the apex yellow. Although the racemes appear to be perfectly normal, 

 flowers have the appearance of keeping partly closed so that even the old 

 ones look like buds. The texture of the flowers is extraordinary and 

 unlike that of any other known species of the genus from the Philippine 

 Islands. 



Province of Benguet, Luzon. December 16, 1908, altitude 2,000 m, Fur.- Bur. 

 15768 Curran & Merrill. 



D. ocellatum (Ames) Pfitzer in Das Pllanzenreich 32 (1907) 117. 



This species, the type of which is represented by ■ small plant in the herbarium 

 of the Bureau of Science, has been again collected by Baeani. The flowers exhibit 

 the same hyaline dots from which the specific name was derived. These dots 

 arc in the form of minute protuberances which give the sepals and petals a 

 veriiiculose character. According to the collector's notes the flowers are brown. 



In the top of a mango tree, Lusod, Province of Benguet, Luzon, December 

 14, 1008, For. Bur. 15908 Baeani. 



D. bicallosum Ames Orchidaceac 2 (1908) 117. 



This specie* was originally collected in Mindoro by Elmer D. Merrill at an 

 altitude of about 9f)0 m on Mount llalcon. On October 23, 1007, Curran and 

 Merritt obtained material in Laguna Province, Luzon, which I unhesitatingly 

 refer to D. bicallosum. The leaves of several of the specimens from Luzon are 

 longer and broader than those of the Mount Haleon plants, in several being 

 Dearly 2 dm long and 5 cm wide. Otherwise there are no conspicuous dif- 

 ferences although the plants from Luzon are more luxuriant, a character which 

 may be accounted for by more favorable conditions for growth. 



Mount Maquiling, Lacuna Province, Luzon, at an altitude of 560 m, in ridge 

 forest : ilowcrs brownish-yellow, October 23, 1007, For. Bur. 77f>7 Curnni ,(• Merritt. 



D. pumilum Reichb. f. Bonplandia 3 (1855) 222. 



Specimens which agree almost perfectly with the Cuming plant in the her- 

 barium of the British Museum of Natural History numbered 2102. the number on 

 which Reiohenbach f. founded l>. putnUurri have been collected in Laguna Province, 

 Luzon, by Curran and Merritt. Detulroehilum pumilum is placed among the 

 doubtful plants in the Plitzer-Kriinzlin monograph in Bugler's "Pllanzenreich" 

 without reference to the specimen of the type number in the British Museum. 

 From my studies I have been unable to discover any sufficient reason for a total 

 disregard of the evidence which this specimen furnishes. An interesting side 

 light on the subject is supplied by a single plant in the (J ray Herbarium which 

 was collected in the Philippines by the Wilkes Expedition. This plant is in- 

 adequate for a sure diagnosis although it clearly belongs to Den&rochihm and 

 is probably conspeciflc with 1). tenue Pfitzer. In Reichenbach's handwriting 

 it has been referred with a query to lhn<ln,ehilu>n pumilum ' Together with 

 Reichenbach's original description and the specimen in the British Museum, the 



