522 
ROBINSON. 
Luzon, Province of Bulacan, Norzagaray, Yoder 226: Province of Bataan, 
Mount Mariveles, IT hit ford 174 in part : Province of Laguna, Calauan, Cuming 
629 in part; Los Banos, Bur. Sci. 9896, 9920 Robinson ; Mount Maquiling, Phil. 
PI. 295 Merrill: Province of Rizal, Jalajala, Bur. Sci., 11895 Robinson & Ramos. 
13. Elatostema pulchellum sp. nov. 
Dioicum : pusillum, caulibus simplieibus vel subsimplicibus, glabrum : 
reeeptaculis sessilibus, paucifloris; staminiferorum bracteis et perianth!! 
segmentis comiculatis ; pistillifexorum perianthio pro genere longiusculo 
saepe inflexo: foliis admodum parvis, membranaeeis, saepius' obovatis, 
triplinerviis, margine 1- ad 4-dentatis. 
Apparently always- dioecious : staminate receptacles sessile,, the outer 
pair of bracts broadly oval or suborbicular, 2.5 to 3 mm long, keeled 
and corniculate, the margins cili'ate-serrate or entire : inner bracts similar 
but much smaller ; flowers, few, subsessile ; perianth-segments 4, subor- 
bicular, 1.5 mm long, obtuse, corniculate; stamens 4, filaments less than 
1 mm long, anthers white, oval, 0.8 mm long, the cells contiguous 1 at 
both extremities : pistillate receptacles sessile or on extremely -short 
peduncles, few-flowered; bracts free except at the base, about' 2 mm 
long, acuminate, pilose, the outer ovate, the inner oblong or oblanceolate; 
pedicels stout in proportion to the minute flower, about 0.5 mm long; 
perianth-segments 3, appearing in young flowers as typical in the genus, 
ovate, rounded, but at least often with the apical half incurved upon 
the lower j in older flowers straightening, often inclosing one- third or 
more of the achene,’ the apex always obtuse, never corniculate; ovary 
not striate; the achene longitudinally striate, brown, 0.8 to 1 mm long. 
A weak plant, with glabrous stems, the leaves of the lower nodes 
usually reduced or wanting: leaves subsessile, the lamina membranaceous, 
oblanceolate, obovate, or nearly oblong, the reduced ones excepted 7 to 
30 mm long, 4 to 9 mm wide, usually strongly inequilateral, minutely 
punctate, the base of the upper side acute, above the base straight or 
moderately, curved, with 1 or much more- rarely 2 teeth, when 2 the 
lower usually minute, acute, and appressed; lower side at base rounded 
or forming a very short ’ auricle, above the base curved, with usually 
2, imore rarely 1 or 3 teeth ; teeth large for the size of the leaf, usually 
obtuse, sometimes apiculate; terminal tooth not or hardly prolonged 
beyond the general outline of the leaf, lanceolate or broadly lanceolate, 
2 to 8 mm long, obtuse; upper surface with abundant cystoliihs and 
often setose especially near the margins, under surface- without cys- 
toliths, glabrous; triplinerved, additional veins usually inconspicuous, 
1 or 2 on each side; stipules linear or linear-lanceolate, acute, about 
1.5 mm long. 
Luzon, Province of Laguna, Mount Banajao, Bur. Sci. 6577 a, 9824 (type), 
9835 Robinson. Mindanao, Province of Misamis, Mount Malindang, For. Bur. 
4636, 4650 Mearns & Hutchinson: District of Davao, Mount Apo, Copeland 1128, 
Elmer 11343. The type and Elmer 11343 have both staminate and pistillate 
