8 
CL VII. GRAMINEiE (Stapf). 
Awn from the stipitiform fertile valve, 
hirsute. 
Racemes many-noded, solitary, very 
rarely paired or fascicled (Trachypo- 
gon sp.) ; all pairs of spikelets hetero- 
gamous and alike, or the lowest 1 to 
many homogamous and barren, very 
different from the fertile, not form- 
ing an involucre around them ... o. Heteropogonastrae. 
Racemes few-noded, much contracted, 
solitary on the branches of decom- 
pound panicles, the lowest pair or 
pairs homogamous, barren, forming 
an involucre around the 1-3 fertile 
spikelets ... ... p. Themedastrse. 
a. Ischaemastrse. 
Racemes geminate or digitate. 
Pedicelled spikelets developed, frequently $ > some- 
times <$ or neuter ; lower glume flat or somewhat 
convex and usually coriaceous below, charta- 
ceous and markedly nerved upwards, rarely 
shallowly concave ; keels frequently winged or 
marginate ... ... ... ... ... ... 3. Isch^emum. 2 6 
Pedicelled spikelets represented by a linear curved 
pedicel ; lower glume coriaceous, convex, 
covered all over with transverse much raised 
ridges which are often broken up into teeth or 
warts, not keeled 4. Thelepogon. 
Racemes always solitary on the culms or branches. 
Glumes not winged, the upper of the sessile spikelet 
with a setose awn ; pedicelled spikelets flat, 
their lower glume strongly nerved ... ... 5. Sehima. 
Upper glume of both spikelets with a wing-like crest, 
muticous ; pedicelled spikelets rounded on the 
back with a large revolute wing from the keel of 
the lower glume ... ... ... ... ... 6. Andropterum. 
Only genus 
6. Apludastrae. 
... 7. Apluda. J 0 ^ 
c. Vossiastrae. 
Lower glume smooth. 
Lower glume of all spikelets long-caudate ; racemes 
digitate, occasionally solitary, somewhat com- 
pressed, very tardily disarticulating ; spikelets 
2-flowered ... 8. Vossia. 
Lower glume of all or at least of the sessile spikelets 
ecaudate, muticous. 
Lower glume quite coriaceous, of the pedicelled 
spikelets produced into a long awn ; spikelets 
2-flowered; racemes solitary ; paired or up to 
5 on a common axis ... ... ... ... 9. Urelytrum. 
