or not at all arcuate, about 1.5 mm. long; rostellum ovate, 
thin: clinandrium truncate, slightly denticulate. 
Luzon: summit of Mt. Botianay, Camarines Sur, alt. 3000 5 
Nov. 2, 1928, Edato 75798 (in Herb. Bur. Sci., Manila); in forest, 
summit of Mt. Madooy, alt. 2000 ft., Nov. 9, 1928, Kdafio 78814 
(Type in Herb. Ames No. 43824); in forest, summit of Mt. Madooy, 
alt. 2000 ft., Nov. 10, 1928, Fdato 75832. 
As the genus is now delimited, Dendrochilum ro- 
tundilabium is one of the smallest, if not the smallest, 
species in the Philippines and has no near allies. It is 
easily distinguished from all other species by the small 
size of the plant, the orbicular lip and the position of the 
stelidia on the column. 
Dendrochilum (Subg. Platyclinis) serratum L. 
O. Williams, nom. nov. 
Dendrochilum grandifiorum Schltr. in Fedde Repert. 
Sp. Nov. 8 (1910) 563, non J.J.Sm. 1904. 
The origin of this species has been obscure since its 
publication. Schlechter received the plant under an in- 
correct name and with incorrect data. He suggested that 
it might be a native of the Philippine Islands. This sug- 
gestion has proved to be correct. The following collec- 
tions may be referred to this species. 
Luzon: Batingtingan, Rizal Province, April 1915, Loker 12981, 
Rizal Province, Sept. 1909, Loher 14571; Mt. Lumutan, Province of 
Rizal, April 1923, Ramos 42324 & 42325, 
Necros: Dumaguete, Cuernos Mts., Prov. Negros Oriental, April 
1908, Elmer 9909. 
Un ocatizep: **Philippinen? Von Sander importiert, wahrschein- 
lich von Micholitz eingesandt.”’ (Fragment of type and analytical 
drawings prepared by Schlechter). 
Dendrochilum (Subg. Platyclinis) unicallosum 
L.O. Wilhams, n. sp. 
[51] 
