NOTES ON PHILIPPINE ORCHIDS, I. 
595 
No. 16342 was found at an altitude of 2,500 m, and according to the notes made 
by the collectors had flesh-colored flowers. The foliage of no. 16347 is very 
variable, (only one plant of no. 16342 was found), so much so that at first glance 
two distinct species appear to be mingled. Dendrochilum tenue (Ames) Pfitzer 
and D. parvulum (Ames) Pfitzer are very close affinities of D. pulogense. 
Mount Pulog, Province of Benguet, Luzon, January, 1909, For. Bur. 1631/7 
(type), 1631/2 Curran, Merritt & Zscholcke. 
D. (§ Acoridium) auriculare sp. nov. 
Pseudobulbi congregati, longitudinaliter rugosi, subpyriformes, circa 
2 cm longi, j uni ores vaginis subaeutis mox in fibras solntis inclusi. 
Folium cum petiolo 1-2 dm longum. Lamina 6.5-13 cm longa, 1.5-2. 7 
cm lata, oblongi-lanceolata, acuminata, acuta vel subobtusa. Petiolus 
gracilis, 1.7-6 cm longus. Pedunculus subfiliformis, multo folium 
excedens, plus minus 2 dm longus. Bracteae inflorescentiae glumaceae, 
pedicellum brevem et ovarium multo excedentes. Flores in racemo laxo 
dispositi, albi. Sepala lateralia ovato-lanceolata, 3-nervia, 7 mm longa, 
4 mm lata. Sepalum superius oblongum vel oblongi-ellipticum, 7 mm 
longum, 3.5 mm latum. Petala rotundato-elliptica vel rotundato-ovata, 
6.5-7 mm longa, 4.5-5 mm lata, 3-nervia. Labellum 4.5 mm longum, 
3-nervium, 3-lobatum; lobus medius subreniformis, latera.libus major, 3.5 
mm longus; lobi laterales auriculares, 1.5 mm longi, inter eos in disco 
labelli callus magnus. Columna sectionis, circa 2 mm longa. 
In general aspect Dendrochilum auriculare suggests D. Eutchinsonianum Ames, 
although analysis of the flowers shows clearly the differences between the two 
species. The lateral lobes of the labellum in D. Eutchinsonianum are distinctly 
linear-falcate, while in D. auriculare they are auriculate, much reduced in size 
and much shorter than the middle lobe (cf. Orchidaceae 2: 96, fig.) . D. auriculare 
is one of the largest-flowered species of the Acoridium section. 
Province of Benguet, Luzon, December, 1908, Maximo Ramos, Bur. Sci. 5818 
(type). Mount Ugo, Province of Benguet, December 17, 1908, Maximo Ramos, 
Bur. Sci. 5771. Collector’s note. — “The color of the flowers is nearly white.” 
D. venustulum (Ames) Pfitzer in Das Pflanzenreich 32 (1907) 116. 
Mount Ugo, Province of Benguet, Luzon, December, 1908, Maximo Ramos, 
Bur. Sci. 581/0. This species was originally described as Acoridium venustulum 
in the Proceedings of the Biological Society of Washington 19 (1906) 147 and 
later illustrated in Orchidaceae 2: 88. It is apparently a rare species as the 
specimens gathered by Ramos are the only ones, with the exception of the type 
material, which have been collected for the Bureau of Science. 
D. philippinense (Ames) Pfitzer in Das Pflanzenreich 32 (1907) 118. 
A very odd form of this species has come from the Lusod-Bayabas trail, 
Province of Benguet, Luzon, which appears to have smaller flowers than the 
type. At first I felt no little hesitation in identifying the plants as D. philip- 
pinense. As all the racemes examined exhibit the peculiarity referred to I have 
prepared the following description. 
Lateral sepals lanceolate, acuminate, acute, about 3.5 mm long, 1.5 
mm wide; upper sepal oblong, acute, 3 mm long, about 1 mm wide. 
Petals acute, 3 mm long, 1.75 mm wide. Labellum . 3-1 obed, the lateral 
lobes equaling the middle lobe, linear falcate, about 1 mm long, middle 
