7 ERE : - “ 
4 Leaves sharp and plane at the tips; stipules 
q acute, soon breaking into shreds 98, Pe Richardsonii 
A Leaves linear, mostly 1-2 mm. wide or less, 
/ { rarely more than 6 mm. wide, neither 
© \ elasping nor WAVY, 
‘+ Leaves 4-6 m. wide, grasslike (see ) 
$ also Ee meteropnekewe] 4 Ya InNeuS 
(, Leaves acute at the apex, their 
margins finely serrulate as seen 
[(Aunier a lens; steer paaad 9. Pe Robbinsii 
f Leaves blunt at the apex but mucronate, : ete, 
{ | 
' Io their margins entire; stems flattened, zosseriformis 
ommonly winged y fo: 
‘ 
+ Leaves 1-2 me. wide or lessy 
( Stipules free froin the petioles and 
| OCleaf-blades { 
% Leaves bearing two small translucent 
/ glands near the base; nutlets 
2 grooved on the back but not 
’\ keeled I. Be pusillus 
$ Leaves without glands; nutlets 
} 2 keeled 12, Be foliosus 
{ stipules joined to the base of the 
ID leafy 
Stigma sessile; nutlets rounded 
‘ion the back, not keeled 13, Be filiformis ‘ 
om j 
% Stigma elevated on a short i 
style; nutlets 2-keeled on 
the back. IA, Pe ctinatus 
; 
| 
