526 
ROBINSON. 
In dried material, tlie leaves, which are from 12 to 18 cm long, often have 
a distinct yellowish tinge, especially on the veins of the under surface; both 
surfaces show very numerous crowded cystoliths; the points of origin of the 
^nerves are separated by at least 5 mm and often much more, they are nearly 
parallel with the margin and connected with the costa by from 3 to 8 veins. 
20. Elatostema banahaense sp. nov. 
Erectum, glabrum, : inflorescentiis staminif eris breviter crasseque 
pedunculatis vel subsessilibus, bracteis^ corniculatis ; floribus juvenilibus 
tetrameris : foliis subsessilibus, membranaceis, oblique oblanceolatis, basis 
uno latere acutis, altero obtusis vel saepius subauriculatis, margine 
dentatis, apice acuminatis, triplinerviis ; stipulis laneeolatis, acute acum- 
inatis, eirciter 12 mm longis. 
Staminate receptacles on very short peduncles or almost sessile, the 
peduncle bracted at the base: outer bracts orbicular-ovate, 8 mm long, 
corniculate, free from one another except at the base,- inner bracts 
similar but only half the length of the outer ; young flowers pedicellate, 
tetramerous : pistillate receptacles unknown. 
Succulent, glabrous, erect, .somewhat zigzag, usually unbranched, 
about 40 to 50 cm high: leaves subsessile, the lamina membranaceous, 
obliquely oblanceolate,.6 to 17 cm long, 22 to 46 mm wide, the lower often 
smaller than the upper, the acute side of the base terminating 4 to 9 
mm from the stem, the other somewhat auriculate or at least obtuse, 
nearly always sessile, the narrower side usually entire below the middle^ 
beyond with from 4 to 11 shallow serrations, the wider cut from below 
the middle into 8 to 16 slightly deeper serrations; the apex contracted 
into a slender acumen 1 to 2.5 cm long; triplinerved, with about 6 
to 8 additional veins and others almost equally prominent ; upper surface 
with conspicuous cystoliths, these much less conspicuous beneath but the 
surface punctate; stipules lanceolate or narrowly elliptic-lanceolate, 10 
to 16 mm long, usually acutely acuminate. 
Luzon, Province of Laguna, Mount Banajao, at 1500 m elevation, Bur. Sci. 
9856 Robinson. Closely allied 'to E. scrip turn, differing in tlie shape of the 
leaves, their venation, serration, and cystoliths, strongly resembling it in the 
stipules and receptacles. With this almost certainly belong two unnumbered col- 
lections made five years apart by Dr. E. B. Copeland at San Ramon, Zamboanga, 
Mindanao. Pistillate receptacles are present, sessile, up to 15 mm in diameter; 
the only staminate receptacle is younger than those of the type, but apparently 
the same; the leaves are very similar except that the veins are pubescent beneath. 
It would better have been made the type, but the only duplicates, those from 
Banajao, had been distributed iindpr the above name. 
21. Elatostema palawanense sp. nov; 
Receptaculis sessilibus, staminif erorum bracteia exterioribus subor- 
bicularibus, uno saltern conspicue sed breviter corniculato ; floribus 
tetrameris : foliis crasse chartaceis, oblanceolatis ad obovatis, basis uno 
latere aeutis vel subobtusis altero rotundatis vel breviter subauriculatis, 
