64 POACEAE 
Spikelets not over 2.7 mm., usually 2.5 mm. long, 
the first glume Pee than half that length: 
ligules 2-3 mm. 
spikelets 3-3.5 mm. Nene first glume two-thirds 
Quee ToU ERIS that length: ligule less than 
r mm. lon 
` Ligules erose or lacerate, not ciliate: basal leaves in 
short tufts, the upper usually nearly equalling 
he terminal rather dense panicle. 
Fruit stipitate: oe 2.5-2.8 mm. long, con- 
spicuously secu 
Fruit 2 2 Stipitate: spikelets not conspicuously 
Spikelets 1. s mm., in occasional specimens 
mc panicle-branches ascending 
re apreadin 
A about 9. 5 mm. long: panicle-branches 
rect or near 
X. LAXA 
Plant erect or partly decumbent, with lax panicles and 
small gaping spikelets. 
XI. kp a 
Plant weak, often with reclining stems, the mature 
panicle diffuse, with filiform branches ET Serres: 
spikelets. 
XII. DEPAUPERATA 
Spikelets about 3.5 mm. ee beaked. 
Spikelets 3 mm. long or 
XIII. LAXIFLORA 
Leaf-sheaths retrorsely pilose: spikelets papillose-pilose. 
Leaf-blades glabrous or nearly so on the surface and 
margin: spikelets 2.2 mm. long. 
Leaf-blades ciliate and more or ess pilose on the 
surface: spikelets 2 mm. long. 
Leaf-sheaths not retrorsely pilose: spikelets pubescent 
rous, 
Spikelets E about 2 mm. long. 
Spikelets glabro 
Leaf-blades S brous on the surface. 
Leaf-blades pilose on the surface. 
XIV. ANGUSTIFOLIA 
Nodes bearded : plant Pray inh vious : autumnal Jeaf- 
SEG, 2.5-2. ium ong. 
Nodes not bearded : Let villous only at base, or nearly 
glabrous: autumnal leaf- M involute or flat. 
Autumnal leaf-blades. flat: lower panicle-branches 
spreading or deflexed. 
Autumnal leaf-blades involute: lower aa 
branches more or less ascending. l 
Spikelets 3. 3-3.5 mm. long, pointed. 
Spikelets less n 3 mm. long, not pointed, or 
obseurel 
Plant glabrous or nearly So: autumnal stems 
ect. 
Spikelets subsecund along the suberect 
panicle-branches 
Spikelets not subsecund : panicle loose and 
o 
Plant pubescent, at least on the lower half. 
E about 2.4 mm., rarely only 2. S 
ng: vernal leaf-blades T2 e 
autumnal blades not falcate 
Spikeletsi not over 2 mm. long: vernal leaf- 
blades cm. ped autumnal blades 
much crowded, falcate. 
25. P. longifolium. 
26. P. Combsi. 
21. P. stipitatum. 
28. P. agrostoides. 
29. P. condensum. 
30. P. hians. 
31. P. verrucosum. 
32. P. depauperatum. 
33. P. linearifolium. 
94. P. laxiflorum. 
35. P. calapense. 
36.' P. ciliatum. 
37. P. polycaulon. 
38. P. strigosum. 
39. P. chrysopsidifolium. 
40. P. consanguineum 
41. P. angustifolium. 
42. P. fusiforme. 
48. P. neuranthum. 
44. P. ovinum. 
45. P. arenicoloides. 
46. P. aciculare. 
