An epiphytic herb with stems up to 8 dm. long. 
Stems multiarticulate, thickened, the segments 0.5—2.5 
cm. long, decreasing in length upward, the old leaf- 
sheaths remaining for a long time; leaves lanceolate, 
acute, thin, 8-5-nerved, unequally bilobed at the apex, 
glabrous above, glabrous or sparingly black-pubescent be- 
low, 25-45 mm. long, 5-9 mim. broad, articulated to the 
striated black-pubescent sheaths which become glabrous 
with age: inflorescence short, probably only 1- or 2- 
flowered; flowers about 15 mm. long, probably white or 
ivory-colored; dorsal sepal lanceolate, acute, about 10 
mm. long and 4mm. broad: lateral sepals attached main- 
ly to the column-foot, blade about 10 mm. long and 4 
mm. broad,—forming a short scrotiform mentum at the 
base which is about 4 mm. long; petals broadly oblan- 
ceolate, obtuse or acute, slightly oblique and often ob- 
scurely denticulate, about 10 mm. long and 4 mm. broad 
near the apex; lip 8-lobed, about 12 mm. long and 10 
mm. broad from the tips of the lateral lobes, 
lobes prominent, slightly divergent, obtuse, about 8 mm. 
lateral 
long,—middle lobe transversely oval, about 4 mm. long 
and 10 mm. broad; column about 8 mm. long, the stel- 
idia erect, about 1 mm. long. 
Luzon: Montalban, Province of Rizal, April 1912, Loher s.n. 
(Tyrer in Herb. Ames No. 44750). 
Dendrobium nemorale is not closely allied to any of 
the other species of the subgenus or section known to me. 
Dendrobium (Subg. Pedilonum) crassimargina- 
tum L. O. Williams, n. sp. 
Herba epiphytica caulibus usque ad 8 dm. longis. 
Folia lanceolata, acuta, cum quinque nervis; inflores- 
centia plerumque biflora, prope caulis medium; flores 
parvi, albi; sepalum dorsale lanceolatum, acutum; se- 
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