XIV,2 Merrill: The Flora of Sumatra 241 
distributed Malayan species, there are a few apparently un- 
described forms, and a considerable number of known species 
previously not recorded from Sumatra. The collections were 
apparently made, for the most part, at low altitudes in the 
settled areas and in the second-growth forests; few species 
characteristic of the primary forests are represented. It is a 
well-known fact that collections made in any part of the Malayan 
region at low altitudes outside of the primary forest invariably 
present a high percentage of widely distributed species and hence 
those that are thoroughly well known. The endemic elements 
of any insular flora in Malaya—and the percentage of endemism 
is usually high in each of the larger islands of the Malay Archi- 
pelago—are for the most part confined to the primary forests. 
With our present state of knowledge of the Sumatran flora I 
have not considered it advisable to publish an enumeration of 
this collection, but have recorded some species, for the most 
part not previously credited to Sumatra, and also give below the 
descriptions of a few apparently undescribed species detected 
while studying the material. 
URTICACEAE 
DEBREGEASIA Gaudichaud 
DEBREGEASIA LONGIFOLIA (Burm. f.) Wedd. in DC. Prodr. 16* (1869) 
235." 
Urtica longifolia Burm. f. Fl. Ind. (1768) 297. 
Karoland, Kaban Djahe, Bartlett & La Rue 81, with the 
local name tjeppira. 
India to Java and the Philippines. 
OREOCNIDE Miquel 
(Villebrunea Gaudichaud) 
OREOCNIDE NIVEA sp. nov. | 
Frutex vel arbor parva, ramulis villosis; foliis chartaceis, 
ellipticis ad elliptico-obovatis, 12 ad 17 cm longis, supra olivaceis, 
subtus niveis et densissime tomentosis, apice acuminatis, mar- 
gine serrato-dentatis, nervis utrinque circiter 12, perspicuis; 
inflorescentiis fasciculatis, capitulis longe pedunculatis, globosis, 
5 mm diametro. 
A shrub or small tree, the branchlets and petioles rather 
densely villous with pale brownish hairs. Leaves chartaceous, 
elliptic to elliptic-obovate, penninerved, 12 to 17 cm long, 6 to 8 
cm wide, serrate-dentate except at the base, the upper surface 
olivaceous when dry, the midrib and nerves more or less pu- 
bescent, the epidermis with few, scattered, rather long, white 
