494 
ROBINSON. 
veins between them ancl the costa, these quite inconspicuous when dry ; 
both surfaces with numerous cystoliths; stiprdes very short, rounded- 
triangular. : 
Luzon, Province of Rizal, Montalban, Bur. Sd. 9529 Robinson (type), Phil. 
PI. 51 Merrill, on limestone cliffs, both collections made at the same time from 
the same clump, Loher 6902. 
Apparently very closely allied to P. celebica Miq., but Miquel’s description is 
too vague to permit very positive statement: the present species seems to have 
much smaller and shorter-petioled leaves, less conspicuously veined. 
12. Pilea dataensis sp: nov. 
Humilis, glabra: inflorescentiis quam petioli breves brevioribus; 
perianthio pistillifero hand valde inaequilobato : paris foliis inaequaliter 
petiolatis et inaequimagnis, laminis membranaceis, late lanceolatis vel 
ovatis, basi obtusis vel truncatis, margine dentatis, apice acuminatis vel 
subacutis, trinerviis; stipulis oblongq-lanceolatis, conspicuis. . 
Pistillate inflorescences not exceeding 5 mm in length, few-flowered: 
perianth 3-lobed, the intermediate ovate, very shortly and obtusely acu- 
minate, about 0.7, mm l'ong, the laterals of about equal length but wider 
and hardly acuminate; rudimentary stamens sessile, ovate, about 0.5 mm 
long ; aehene compressed-ovoid, nearly 1.5 mm long, densely granular T 
roughened. 
Low plants 15 cm high or less, entirely glabrous: leaves of a pair un- 
equal both as regards 'petioles and lamina, the former' never exceeding 1 
cm in the larger leaves or 5 mm in the smaller, lamina membranaceous, 
broadly lanceolate to ovate, attaining 4 cm in length and 1,5 cm in width 
but often smaller, the smaller of a pair about two-thirds the length of 
the larger, the base obtuse, rounded, or subtruncate, the margins not 
deeply cut into from 8 to 11 usually very obtuse teeth, the apex gradually 
contracted and usually forming, an acumen from 2.5 to 7 mm long, 
tnnerved or barely triplinerved, additional veins rather few, usually about 
6 or 7, both these and the reticulations fairly conspicuous on both sur- 
faces, cystoliths abundant on both surfaces; stipules oblong-lanceolate, 
obtuse, 3 tn 5 mm long. 
Luzon, District of Lepanto, Mount Data, in mossy forest at 2100 m elevation, 
Merrill 4502. Of our species, nearest to the preceding, but easily distinguished 
by the stipules, achenes, and in many other ways ; differing from the next in 
the smaller size of plant and leaves, shorter stipules and petioles and other 
characters. Apparently a very distinct species. 
13. Pilea sylvatica Elmer Lead. Philip. Bot. 3 (1910) 879. 
Pileae angulatae B'l. (P. stipulosae Miq.) valde affinis, sed differt 
inflorescentiis aliquando monoicis, stipulis adhuc longioribus (12 'ad 20 
mm) saepius latioribus, et acheniis tuberculatip. 
Mindanao, District of Davao, Mount Apo, Todaya, Elmer 1169 S, 1151ft- 
Local name : sigbut-tala. 
