52,4 Ames and Quisumbing: Philippine Orchids, IV 447 
4.5 mm lata, margine integra, 5-nervia. Labellum simplex, 
oblanceolatum, e basi sensim attenuatum, cucullatum, ungui- 
culatum, subacutum, 13.5 ad 14 mm longum, callo basali hippo- 
crepiformi. Columna brevis; clinandrium tridentatum, denti- 
bus lateralibus rotundatis, dente medio tenui. 
Stems fascicled, unbranched, 30 to 95 cm long, 8 to 15 mm in 
diameter, pendulous, terete, with swollen nodes; internodes 1.5 
to 3 cm long. Leaves linear-lanceolate, acuminate, acute, sub- 
membranaceous, 7.5 to 9 cm long, 1.4 to 1.6 cm wide, the sheaths 
subcompressed. Racemes short, laxly 4-' to 8 -flowered, on de¬ 
foliated stems. Flowers purple, 1.4 to 1.8 cm across, odorless; 
bracts pale purple, lanceolate, acute, 1.5 to 2.5 mm long. Ped¬ 
icellate ovary slender, 10 to 14 mm long. Lateral sepals, ovate, 
acute, 9 to 10 mm long, about 5.5 mm wide at the base, 7-nerved; 
mentum subequally long, obtuse, retuse at the very tip. Dor¬ 
sal sepal erect, ovate-lanceolate, subacute, 9 to 9.5 mm long, 
4.5 to 5 mm wide, 5-nerved. Petals lanceolate-elliptic, acute, 
8.5 to 9.5 mm long, 4 to 4.5 mm wide, the margins entire, 5- 
nerved. Labellum simple, oblanceolate, narrowed at the base, 
cucullate, unguiculate, subacute, 13.5 to 14 mm long, 5 to 5.5 
mm wide near the apex, with a horseshoe-shaped callus at the 
base. Column short, about 2 mm long; stelidia erect, the lateral 
ones rounded, the median slender acute. 
Luzon, Manila, Bureau of Science orchid house, Bur. Sci. 
84.7H Quisumbing, February 5, 1932. 
The living plants were originally collected by the late Mr. 
Maximo Ramos, collector of the Bureau of Science, on Mount 
Iraya, Batan Island, north of Luzon. 
The flowers are mallow purple or phlox purple, the nerves 
on sepals and petals and the lines on the labellum true purple; 
anther apricot yellow. 
Dendrobium irayense is allied to Dendrobium victoriae-re- 
ginae Loher, but differs in its much smaller flowers and in the 
short lateral sepals. 
DENDROBIUM YEAGERI sp. nov. Plate 3, fi«rs. 7 and 8; Plate 4, figrs. 29 to 37; Plate 9, 
fig:. 2. 
Caules fasciculati, 25 ad 50 cm longi, pauci ramosi, penduli; 
internodia ad basim leviter incrassata, 1.2 ad 2 cm longa. Folia 
lanceolata, acuta, 4.5 ad 10.5 cm longa, 1.3 ad 2.3 cm lata, 
nervosa, papyracea; vaginae foliorum subcompressae, apice 
paulum ringentes. Racemi pauciflori (2- ad 6 -flori) ; bracteae 
oblongae, obtusae, usque ad 6 mm longae, membranaceae; ova¬ 
rium pedicellatum tenerum, 1.5 ad 1.6 cm longum. Sepala la- 
