CLVII. GR AMINE /E (Stapf). 
5 
Key to the Sub-tribes and Groups of Genera, 
<y Joints and pedicels more or less stout, triquetrous or 
rounded, thickened upwards or widened and more 
or less flattened throughout, posticously approxi- 
mate or contiguous or partly or wholly fused, 
forming a more or less imperfect receptacle for the 
reception of the sessile spikelet, rarely gaping and 
then the spikelets typically awnless ( Lasiurus , 
Elyonurus and Chasmopodium ; see also the 1- 
noded jointless racemes of Apludo), their tips 
horizontally or obliquely truncate, without appen- 
dages (excepting UrelytrumY and often hollowed 
out ; fertile spikelets 1- or 2 -flowered with the 
fertile floret awned or unawned : 
Fertile spikelets 2 -flowered ; fertile floret awned 
from the sinus of the 2 -fid or 2 ^dentate valve *• 
(sometimes awnless in Apluda) : — Sub-tribe 
Ischcemince 
Racemes several- to many-noded, espatheate, 
digitate or solitary on the culms and branches, 
the latter, if any, few ; joints and pedicels 
posticously approximate, rarely contiguous ; 
spikelets of each pair homogamous or more 
often heterogamous, usually similar in shape 
and nervation, rarely distinctly heteromor- 
phous or the pedicelled much reduced ; 
fertile spikelets awned ... ... ... ...a. Ischaemastras. 
Racemes 1-noded, reduced to 3 heteromorphous 
spikelets (the sessile with a S and a £ floret -yX 
and an inflated callus, one pedicelled with 2 
S florets, the other rudimentary on a glume- 
like pedicel) enclosed in a boat-shaped spathe, ■ ' 
solitary at the ends of the branches of a de- 
compound panicle ; fertile florets awned or 
awnless 6. Apludastrse. 
Fertile spikelets 1- or 2 -flowered ; fertile florets 
awnless ; joints and pedicels usually postic- 
ously contiguous or more or less fused, rarely 
.gaping ( Lasiurus , ElyonurusS^ and Chasmopo- 
dium in Rottbcelliastrce) ; spikelets of each pair 
heterogamous, more or less dissimilar or the 
pedicelled much reduced or quite suppressed : — 
Sub- tribe Rottboellince. 
Racemes in espatheate inflorescences, racemosely 
arranged on a common axis or subpaniculate 
or solitary by occasional reduction, rarely 
typically so and then with long awns from 
the glumes of the pedicelled spikelets (species 
of Urelytrum) c. Vossiastrae. 
Racemes at the ends of the culms and their | f 2 '■ ■ ' 
branches in a false (rarely true) spatheate ‘ t 
panicle or solitary and terminal on simple t _ 
or sparingly branched culms d. Rottboelliastrae. 
J oints and pedicels slender, filiform, linear, sub- 
cuneate or subclavate, very rarely inflated ; 
fertile spikelets usually 1 -flowered and awned. 
All spikelets alike in shape and sex, or if different 
