This species which has no very close allies among the 
Philippine Dendrobiums is easily distinguished by means 
of the broad, serrated blade of the lip. The species to 
which it seems most closely allied is Dendrobium Lawesii 
I.v. Miller of New Guinea. 
Dendrobium (Subg. Dendrocoryne) platycaulon 
Rolfe in Kew Bull. (1892) 139. 
This rare species, which has not been previously known 
from wild specimens, is now represented in Herb. Ames 
by the following specimens: 
Luzon: Province of Rizal, Sept. 1909, Loher 14586. 
Minpanao: Lake Mainit, Province of Surigao,June 1909, Loher s.n. 
‘wo other specimens which are not in condition for 
positive determination probably belong to this species. 
Bono: in damp forest or tree trunk, Bilar, alt. 2000 ft., Oct. 9, 
1923, Ramos 3118, 
Minpanao: on tree trunk, Mt. Tubuan, Zamboanga District, alt. 
1200 ft., Ramos & Edato 36619. 
Dendrobium (Subg. Bolbodium) microphyton 
L. O. Williams, n. sp. 
Herba epiphytica parva, repens, caulibus usque ad 
10cm. longis. Folia lanceolata vel elliptica, obtusa, apice 
obscure bilobata; inflorescentia uniflora; sepalum dorsale 
ovato-lanceolatum, acutum; sepala lateralia late ovata; 
petala lineari-oblonga, acuta; labellum oblongum, trilo- 
batum, lobi laterales parvi, lobo medio bilobato et paulo 
incrassato; columna generis. 
A small repent epiphytic or terrestrial herb with 
stems up to 10 cm. long or possibly longer. Pseudo- 
bulbs fusiform or ovoid, densely aggregated on the repent 
stem, 5-10 mm. Jong and 2-8 mm. thick; leaf one from 
the summit of each pseudobulb, lanceolate to elliptic, 
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