CLVII. GR AMINES (Stapf). 
in sex, then the pedicelled $ ( Eriochrysis ) : — 
Sub-tribe Saccharince. 
Racemes in more or less compound panicles or 
racemosely arranged on an elongated common 
axis ; spikelets 1 -flowered ; awn from the 
sinus of the 2 -dentate valve or from the tip 
of the entire valve or 0 ... ... . . . < 
Racemes digitate, rarely solitary ; spikelets 1- 
flowered (in the African species) ; awn from 
the sinus of the 2 -fid or 2 -dentate valve ... j 
The spikelets of each pair different in sex and 
frequently also in shape and size, or if those of 
some pairs of a raceme are alike in sex, then 
both £ or neuter ; the fertile spikelets 1 - 
flowered : — Sub-tribe Andropogonince. 
Racemes in more or less compound espatheate 
panicles ; pedicels without a translucent 
middle line ; pedicelled spikelets 3 , neuter 
or quite suppressed (including the pedicel in 
Cleistachne) ; awn from the sinus of the 2 -fid 
valve ... ... ... ... ... . . . (j 
Racemes not in compound espatheate panicles or 
if so ( Gapillipedium ) then the pedicels with a 
translucent middle line. 
Fertile valve awned from low down on the back ; 
sessile spikelets convex on the back and 
rounded on the sides, often muriculate, 
particularly along the sides, pedicelled 
usually rudimentary or 0, rarely 3 ; 
racemes digitate ... h 
Fertile valve awned from the sinus of a 2 -fid or 
2 -dentate valve or continuing the more or 
less stipitiform valve, very rarely awnless 
( Hypogynium ). 
Margins of the lower glume of the fertile 
spikelet inflexed and the glume there- 
fore sharply 2 -keeled more or less all 
along with a short obtuse callus, rarely 
the keels rounded off downwards with 
the margins subinvolute, but then the 
back of the glume deeply sunk between 
the keels and the callus short or long and 
acute ( Andropogon § Piestium ) ; awn 
glabrous or scabrid, very rarely hirsute 
(Andropogon sp.). 
Spikelets awnless, in decompound more or 
less compact panicles ; joints and 
pedicels filiform, unappendaged ; ses- 
sile spikelets $ , pedicelled 3 very 
similar ... ... ... ... . . . j 
Spikelets awned. 
Awn forming a continuation of the stipi- 
tiform fertile valve ; racemes digi- 
tate or racemosely-digitate and then 
usually very numerous, all more or 
less shortly peduncled on simple or 
almost simple culms, or solitary at 
. Saccharastrse. 
’. Polliniastrae. 
Sorghastrae. 
. Arthraxonastrae. 
to Irx * v 
'. Hypogyniastrae. 
