NOTES ON PHILIPPINE ORCHIDS, I. 595 



No. 10342 was found at ail 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. 10342 was found), so much so that at first glance 

 two distinct species appear to be mingled. Dendroehilum tcnue (Ames) Pfitzer 

 and D. parrulum (Ames) Pfitzer are very close affinities of I), pulogcnse. 



Mount Pulog, Province of Benguet, Luzon. January, 1009, For. Bur. t68#! 

 i type i. 163^2 Cumin, Merrill tfc Zsehokke. 



D. (§ Acoridium) auriculare sp. imv. 



Pseudobulbi congregati, longitudinaliter rugosi, subpyriformes, circa 

 2 cm longi, juniores vaginis subacutis mox in fibras sol ut is incluai. 

 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. Pedunculue subfiliformis, multo folium 

 excedens, plus minus 2 dm longus. Bracteae inflorescentiae glumaceae, 

 pedicellum brevem et ovarium multo excedentes. Plores in racemo laxo 

 dispositi, albi. Sepala Lateralia ovato-lanceolata, S-nervia, T trim 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. Labcllum 1.5 mm longum, 

 3-nervium, 3-lobatum; lobus medius subrenil'ormis, lateralibus major, 3.5 

 mm longus; lobi lateralis attricularcs, 1.5 mm longi, inter cos j n disco 

 labelli callus magnns. Columna seetionis, circa 2 mm longa. 



In general aspect Dendrochilum auriculare suggests 1). II utchimonianum Ames. 

 although analysis of the flowers shows (dearly the differences between the two 

 species. The lateral lobes of the labellum in />. Hutchinaonianum 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.). />• auriculare 

 is one of the largest -flowered species of the Acoridium section. 



Province of Benguet, Luzon, December, 1908, Maximo Ramos, Bur. Bci. 5S18 

 (type). Mount Ugo, Province of Benguet, December 17, 1908, Maximo Ramos. 

 liar. Sci. 5771. Collector's note. — "The color of the flowers is nearly white." 



*D. venustulum (Ames) Pfitzer in Das Pllanzenreich 32 (1007) 116. 



Mount Ugo, Province of Benguet, Luzon. December, 1908. Maximo Ramos, 

 Bur. Set. 5840. This species was originally described as Acoridium venustulum 

 in the Proceedings of the Biological Society of Washington 19 (1900) 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 lMlanzenreich 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 J), philip- 

 pinense. As all the racemes examined exhibit the peculiarity referred to I have 

 prepared the following description. 



Lateral sepals lanceolate, acuminate, acute, aboul .'!.•"> 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-lobed, the lateral 

 lobes equaling the middle lobe, linear falcate, aboul 1 mm long, middle 



