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 
is 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 flowers 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, For. Bur. 
15763 Curran & Merritt. 
D. ocellatum (Ames) Pfitzer in Das Pflanzenreich 32 (1907) 117. 
This species, the type of which is represented by a small plant in the herbarium 
of the Bureau of Science, has been again collected by Bacani. The flowers exhibit 
the same hyaline dots from which the specific name was derived. These dots 
are in the form of minute protuberances which give the sepals and petals a 
verruculose 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, 1908, For. Bur. 15908 Bacani. 
D. bicallosum Ames Orchidaceae 2 (1908) 117. 
This species was originally collected in Mindoro by Elmer D. Merrill at an 
altitude of about 950 m on Mount Halcon. On October 23, 1907, 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 Halcon plants, in several being 
nearly 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, Laguna Province, Luzon, at an altitude of 550 m, in ridge 
forest; flowers brownish-yellow, October 23, 1907, For. Bur. 7797 Curran & 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 Reichenbach f. founded D. pumilum, have been collected in Laguna Province, 
Luzon, by Curran and Merritt. Dendrochilum pumilum is placed among the 
doubtful plants in the Pfitzer-Kriinzlin monograph in Engler’s “Pflanzenreich” 
without reference to the specimen of the type number in the British Museum. 
From my studies | 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 Gray 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 Dendrochilum and 
is probably conspecific with D. tenue Pfitzer. In Reichenbach’s handwriting 
it has been referred with a query to Dendrochilum pumilum! Together with 
Reichenbach’s original description and the specimen in the British Museum, the 
