Luzon: Montalban, Prov. Rizal, May 1909, Loher 12566; Prov. 
Rizal, Sept. 1909, Loher 14643 (Type in Herb. Ames No. 43749): 
on trees, mossy forest slopes, Mt. Irid, Prov. Rizal, Nov. 1926, Ramos 
& Edafio 48450. 
This species resembles Dendrochilum longispicatum 
quite closely in aspect. The structure of the lip is dif- 
ferent from that of every other species known to the au- 
thor; and this difference, together with other characters, 
serves to distinguish it from its closest allies. 
Dendrochilum (Subg. Platyclinis) yuaccaefolium 
L. O. Williams, n. sp. 
Herba epiphytica, usque ad 85 em. alta. Pseudobulbi 
anguste cylindracei, sulcati, aggregati. Folia linearia, 
acuta. Bracteae inflorescentiae oblongo-ovatae, acutae. 
Sepalum dorsale lineare, acutum. Sepala lateralia Jin- 
earia, acuta. Petala linearia, integra, trinervia. Labellum 
oblongo-ovatum, integrum, denticulatum et raro cum 
lobis lateralibus parvis. Columna subgeneris. 
Pseudobulbs narrowly cylindric, sulcate, tapering 
from the base to the apex, 4.5-5.5 em. long, 5-10 mm. 
thick toward the base when dry; flowering pseudobulbs 
very much smaller and inconspicuous, covered with fi- 
brous sheaths. Leaves linear, acute, tapering gradually to 
the petiole, margins inrolled, 17-80 cm. long, 9-13 mm. 
broad; leaves from the flowering pseudobulbs inconspic- 
uous at the time of the flowering. Peduncles 10-17 cm. 
long, part above the sheaths floriferous. Raceme disti- 
chous, rather dense, the alternate flowers about 2.5 mm. 
apart. Bracts oblong-ovate, acute, strongly striated, about 
5 mm. long and 2.5 mm. broad. Dorsal sepal linear, acute, 
6.5-7 mm. long, 1-1.5 mm. broad. Lateral sepals linear, 
acute, 8-nerved, 6.5—-7 mm. long, 1—-1.5 mm._ broad. 
Petals linear, acute, entire, 8-nerved, 5—6 mm. long, 0.8—1 
mm. broad. Lip entire, denticulate or rarely with small 
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