not.
There are two lodicules and three stamens. Stigmas are feathery. Grain
is free. The pedicelled spikelets are usually smaller than the sessile
and have three or four glumes and are awnless.

KEY TO THE SPECIES.

A. Sessile spikelets all similar.

B. Racemes of many spikelets.

C. Peduncle of racemes enclosed in
spathiform leaf-sheaths.

D. Joints of rachis and pedicels of upper
spikelets slender and tips obliquely
truncate.

Racemes solitary, pedicelled spikelets
similar to the sessile, glume
1 of sessile spikelets pitted. 1. A. foveolatus.

DD. Joints of rachis and pedicels of upper
spikelets clavate or trumpet-shaped and
tips cupular with toothed margins.

Racemes binate, pedicelled spikelets
differing from the sessile, glume I
of the sessile spikelets deeply
channelled. 2. A. pumilus

CC. Peduncle of racemes not enclosed in
spathiform leaf-sheath.

Racemes many, fascicled or panicled,
glume I of sessile spikelets
glabrous and pitted. 3. A. pertusus.

Racemes many and whorled in the
panicle; glume I of sessile spikelets
muricate on the margins. 4. A. squarrosus.

BB. Racemes of 3 spikelets on the capillary
whorled branches of an erect panicle.

Pedicels of upper spikelets half as long
as the sessile spikelets or longer.

Leaves broad.

Leaf-sheaths covered densely with
bristly hairs. 5. A. asper.

Leaf-sheaths covered with soft hairs. 6. A. Wightianus

Pedicels of upper spikelets not half as
long as the sessile spikelet.

Leaves glabrous and narrow 7. A. monticola.

AA. The lowest one or more sessile spikelets in
all racemes, or at least in one or two, differing
from all those above.

Racemes digitate, rarely solitary, spikelets
all alike in form but differing in sex.

Pedicel 1/3 as long as the sessile
spikelets; nodes usually glabrous;
ligule usually short and membranous. 8. A. caricosus.

Pedicel 1/2 as long as the sessile
spikelets; nodes bearded; ligule
large and membranous. 9. A. annulatus.

Racem