512 
ROBINSON. 
3. Outer bracts of staminate receptacles not or very slightly corniculate. 
4. Leaves pinnately veined; pistillate receptacles peduneled. 
. 26. E. whitfordii 
4. Leaves triplinerved ; pistillate receptacles sessile or subsessile. 
5. Leaves distinctly acuminate. 
6. Stems glabrous or somewhat pilose at the apex. 
7. Stipules large, at least 4 mm long, often much more. 
8. Basal leaf -auricle very, strongly developed 27. E. edule 
8. Basal auricle not or not strongly developed 28. E, carinoi 
7. Stipules inconspicuous, 1.5 to 2.5 mm lo.ng 29. E. angustatum 
6. Stems densely pubescent, at least at the apex. 
7. Mature leaves chartaceous or subchartaceous ; teeth on wider side 
rarely as many as 15. 
8. Upper leaves usually greatly narrowed; stipules persistent. 
30. E. apoense 
8. Upper leaves similar to rest; stipules less persistent. 
31. E. longifolium 
7. Mature leaves membranaceous; marginal teeth more numerous. 
8. Stem-pubescence retrorse 32. E. plumbeum 
8. Stem-pubescence antrorse 33. E. contiguum 
5. Leaves not or barely acuminate; stems pubescent. 
6. Leaves not variegated, upper surface with crowded cystoliths. 
7. Venation coarser, on wider side usually continuous, marginal 
teeth about 20 ...L.- 34. E. obtusiusculum 
7. Venation delicate, usually not continuous, marginal teeth usually 
10 or less.... .- 35. E. brongniartianum 
6. Leaves variegated; upper surface Avith scattered cystoliths or. none. 
36. E. variegatum 
^ . Plants erect, the stems woody or nearly so. 
3. Terminal leaf-tooth short, merely continuing the general outline of the 
leaf -apex. 
4. Leaf serrate nearly to the narrowed base, teeth on wider side usually 
8 or 9 .......iiis, — 37 . E.benguetense 
4. Leaf-teeth above middle, none to 4 on the wider side, which is not con- 
tracted at base 38. E. podophyllum 
3. Leaves distinctly acuminate. 
4. Stipules not exceeding 4 mm long. 
5. Pubescence of. stem and veins of under surface of leaves appressed; 
marginal teeth almost always 2 ..1 : 39. E. halconense 
5. Pubescence longer and more spreading; teeth more numerous. 
6. Veins of wider side 3 or . 4, teeth 5 or 6, rarely found below middle 
of leaf - 40. E. sublignosum 
6. Veins of wider side 5 or 6, teeth 9 to 14, extending below middle of 
leaf 41. E. ba/ruringense 
4. Stipules at least 7 mm long 42. E. integrifolium 
1. Staminate receptacles on long basal or subbasal peduncles 43. E. scapigerum 
1. Elatostema luzonense sp. nov. 
Receptaculis staminiferis graciliter peduneulatis, bracteis corniculatis, 
floribus itetraineris : receptaculis pistilliferis peduneulatis vel sessilibus : 
foliis siecis nxembranaceis, lanceolatis ad obovatis, basi acutis ad rotun- 
