530 
ROBINSON. 
auriculate, the teeth of the upper side 4 to 6, of the lower 4 to 11, acute 
or obtuse, on narrow leaves very shallow, on wider leaves deeper, on the 
uppers side usually not below the middle of the leaf, on the lower side 
often occurring somewhat lower, terminal tooth triangular-lanceolate, 
acute, 15, to 20 mm long; both surfaces glabrous or the principal veins of 
the under obscurely pilose, upper surface when dry somewhat purplish, 
the under paler, both showing numerous long but not crowded cystoliths, 
these especially evident on the under surface by reason of the contrast 
in color; almost pinnately veined, the basal nerves present, but on the 
upper side close to the margin and on narrow leaves inconspicuous, 1 on 
both sides soon connecting with the succeeding veins, numbering usually 
8 or 9, with others intervening ; stipules, triangular-ovate or triangular- 
lanceolate, 10 to 12 mm long, hyaline except on. the costa, acute. 
Luzon, Province of Laguna, Mount Banajao, at about 800 m elevation, Bur. 
Sci. 9766 Robinson. 
25. Elatostema spinulosum Elmer Leafi. Philip. Bot. 2 (1908) 468. 
Erectum vel recumbens, caulibus angulatis et foliis praesertim subtus 
spinulis acutis haud urentibus horridis: receptaculis staminiferis ses- 
silibus, bracteis exterioribus orbicularibus, tricarinatis, corniculatis, 
floribus trimeris (?) vel tetrameris; receptaculis pistilliferis sessilibus, 
1.5 cm diametro, bracteis exterioribus ad medium coalitis, corniculatis : 
foliis subsessilibus, sicco subchartaceis, oblique oblaneeolatis vel obovatis, 
inaequilateralibus, circiter 20 cm longis, 5 ad 9 cm latis, lateris an- 
gustioris basi acutis, latioris subauriculatis, ima basi excepta dentatis, 
sed lateris angustioris dimidia basali parte minute, supra grosse, apice 
abrupte acute acuminatis, utrinque glabris et cystolithis notatis sed subtus 
minus conspicue; triplinerviis, venis 4 ad 7 et reticulis subtus con- 
spieuissimis. 
Negros, Cuernos Mountains, Elmer 9776 (type collection) : Canlaon Volcano, 
Phil. PI. 233 > Merrill . 
The staminate flowers are stated in the original description to be either 
3-merous or 4-merous. As the occurrence of 3-merous flowers in the genus 
would be of especial interest, a number were examined from each of the col- 
lections cited, those from Canlaon being preserved in alcohol; all were 4-merous. 
The pistillate receptacles seen Avere oval rather than orbicular in outline, the 
central part formed by the united bracts being about 1 cm long, 7 mm wide, Avith 
the free portion of the outer bracts triangular-ovate, 3 mm long, of the inner 
bracts lanceolate. 
Local name (Cuernos Mountains) : handalumog. 
26. Elatostema whitfordii Merr. in Philip. Journ. Sci. 1 (1906) Suppl. 48. 
Luzon, Province of Bataan, Mount Mariveles, Whitford 254, Eor. Bur. 1234 
Borden. Mindanao, District of Davao, Mount Apo, Elmer 10709. 
As stated in the original description, this species approaches E. macrophyllum 
Brongn. in many respects. Comparison with Javan material of the latter shows 
E. whitfordii to differ by having the margins of the entirely glabrous leaves 
cut into twice as many serrations, roughly 40 against 20, by the venation being 
