} 
) 
yy «¢ 
522 ROBINSON. 
Luzon, Province of Bulacan, Norzagaray, Yoder 226: Province of Bataan, 
Mount Mariveles, Whitford 174 in part: Province of Laguna, Calauan, Cuming 
629 in part; Los Baios, Bur. Sci. 9896, 9920 Robinson; Mount Maquiling, Phil. 
Pl, 295 Merrill: Province of Rizal, Jalajala, Bur. Sci. 11895 Robinson & Ramos. 
15. Elatostema pulchellum sp. nov. 
Dioicum: pusillum, caulibus simplicibus vel subsimplicibus, glabrum : 
receptaculis sessilibus, paucifloris; staminiferorum bracteis et perianthii 
segmentis corniculatis; pistilliferorum perianthio pro genere longiusculo 
saepe inflexo: foliis admodum parvis, membranaceis, 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 ciliate-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 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, 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, more 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 cystoliths 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 
