490 
ROBINSON. 
oval, those of a pair equal or subequal, the can line 5.5 to 10 cm long, 1.8 
to 4.5 cm wide, those of the branches smaller, acute or obtuse at the base, 
the margins forming many shallow teeth, the apex forming an ’acumen 
1.5 cm long or less: trinerved or somewhat triplinerved, the transverse 
veins between the costa and the ' nerves numerous, together with the 
reticulations conspicuous on at least the under .surface; cystoliths, few and 
never conspicuous on the upper surface; fairly abundant on the under, 
especially on the principal veins; stipules semicircular, 0.5 him long. 
Luzon, District of Bontoc, Vanoverbergh 736, 881: Province of Benguet, Mount 
Tonglon, Bur. Sci. 5398 Ramos; Rio Trinidad, Bur. Sci. 5566, 5553 (type) Ramos; 
Mount Pulog, For. Bur. 16045 Curran, Merritt, & Zschoklce. These collections 
are' very similar in general appearance, yet it is possible that they may hereafter 
require segregation, as in some the perianth-segments of the pistillate flowers are 
very nearly equal, and these have the leaf-bases acute, the others have the 
perianth-segments unequal and the leaf -bases are obtuse: however, there is con- 
siderable variation in the comparative length of the perianth-segments in different 
flowers in the same inflorescence. The species is fairly closely allied to the 
next, but easily distinguished by the different texture of the smaller' and shorter- 
petioled leaves, and the shorter inflorescences. 
5. Pilea melastomoides Wedd. in Anri. Sci, Nat. Bot. IV 1 (1854) 186. 
XJrtica melastomoides Poir. Suppl. 4 (1816) 223. 
Luzon, District of Lepanto, Mount Data,, Merrill 4438, 4579: Province of 
Benguet, Pauai, Bur. Sci. 4 4-12, 4456 Mearns, Bur. Sci. 8324 McGregor; Pauai 
to Baguio, Merrill 4784; Mount Tonglon (Santo Tomas), Elmer 6533, For. Bur. 
4955 Curran: Province of Laguna, Mount Banajao, Bur. Sci. 9765 Robinson. 
The identification is a somewhat doubtful one, though extremely close alliance 
is certain. Weddell 19 says of the species under P. trinervia Wight, to which he 
reduced- it, that while the peduncles of the staminate inflorescences exceed the 
petioles, those of the pistillate do not. This is not true of the Philippine plants, 
as in both cases the petioles are shorter than the peduncles, though themselves 
long. Moreover, the cystoliths of the upper surface of the leaves are wanting, 
unless they are represented by extremely numerous points very different from 
the typical cystoliths of the genus, which are abundant on the under surface. The 
collections are quite well represented by Wight’s figure 20 of Pilea trinervia, and 
by that of P. oreophila Miquel. 21 
Java, probably also India and Ceylon. 
6. Pilea robinsonii Elmer Leafl. Philip. Bot. 3 (1910) 880. 
Herba succulenta, glabra, caulibus 1 ad 3 m longis reclinatis: inflores- 
centiis pistilliferis quam petioli multp brevioribus ; perianthii lobis 3, 
valde iiiaequalibus, intermedio ovarii marginem apice excepta anguste 
amplectente, lateralibus multo minoribus subinconspicuis, stigmate 
capitellato-penicillato ; acheniis compresso-ovoideis, marginem versus 
linea granulata eircumcinctis : f oliis deeussatim oppositis, paris petiolis 
19 DC. Prodr. 1 6 1 (1869) 127. 
20 leones 6 (1853) pi. 1973. 
21 FI. Ind. Bat. I 2 (1859) pi, 17. 
