lip which is the broadest part, —margin of the lanceolate 
middle lobe often irregularly cut; column short, about 
2 mm. long, stelidia erect. 
Minpanao: Todaya (Mt. Apo), District of Davao, August 1909, 
Elmer 11502 (Tyee in Herb. Ames No. 44950). 
The following field note, made by Mr. Elmer, ac- 
companies the specimen: 
‘Small tufts upon limbs of trees on a very steep edge 
of the Cati Creek at 5750 feet of Mt. Apo. Stems quite 
rigid, descending, green and covered more or less with 
grayish marcescent sheaths, branched ; leaves descending, 
flat, thickly coriaceous, the apex recurved, paler green 
beneath; flowers creamy white, pendulous, upon the 
leatless stalks. —Saromat-ta-cayo. ”’ 
This species is rather an outstanding one. It seems 
to have no near allies either in the Philippines or else- 
where. 
Dendrobium (Subg. Pedilonum) serratilabium 
L. O. Williams, n. sp. 
Herba epiphytica cum caulibus usque ad 4 dm. longis. 
Caules multiarticulati, incrassati; folia lanceolata, acuta 
vel acuminata; inflorescentia brevis, pauciflora; sepalum 
dorsale late lanceolatum, acutum:; sepala lateralia similia, 
mentum formantia; petala elliptico-lanceolata, acuta; la- 
bellum basi unguiculatum, lamina rotundata vel late sub- 
cordata, serrata vel lacerata; columna generis. 
Anepiphytic herb with stems up to 4dm. long. Stems 
multiarticulate, thickened, much wrinkled (at least in 
dry material) the segments mostly 1.5-2 em. long, the 
older ones often with the remains of the old leaf-sheaths, 
yellow in color, the younger (annual) part of the stem 
not much thickened and covered with the leaf-sheaths; 
leaves lanceolate, acute or acuminate, with about seven 
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