Digitaria .] 
CLVII. GRAMINE^a (Stapf). 
425 
Rhachis of racemes usually flat with a rounded 
smooth midrib on the face and more or less 
terete smooth discoid- tipped pedicels, rarely 
(35, D. angolensis) trigonous with scaberulous 
pedicels ; upper glume as long as the spikelet, 
5-3-nerved, hairs of spikelets if any (see 38, D. 
exilis ) conspicuously verrucose, very fine ; annual 
f f Racemes genuinely peduncled ; that is, with a bare 
terete filiform base without arrested spikelets. 
Racemes in 1 whorl (rarely 2), very long, ultimately 
horizontally spreading with long plumose 
peduncles and very distant pairs of spikelets ; 
suffrutescent 
Racemes in open or contracted panicles ; peduncles 
fine, glabrous, moderately long 
**Spikelets quite glabrous, accompanied by white setulse 
of equal or greater length from the tips of the 
pedicels ; lower glume normally suppressed, upper 
reduced to a small scale or also suppressed ; 
barren valve 3-1 -nerved; racemes simple or 
downwards compound in open or contracted rarely 
almost spiciform panicles ... 
I. Eu-Digitaria. 
(a) Sanguitstales. 
*Perennial. 
Racemes digitate or subdigitate, fastigiate, blades 
mostly narrow (up to 2 lin.) or if wider (2, D. mi- 
l-anjiana ) then rather firm. 
Racemes dense ; rhachis narrowly winged, lin. 
wide. 
Spikelets subimbricate, acute, mostly distinctly 
silky, coloured, nerves of the barren valve 
smooth ; compactly csespitose with silky to- 
mentose bases (cataphylls and persistent 
sheath-bases), blades usually 1-2, rarely 3 
lin. wide 
Spikelets densely imbricate, acutely acuminate, 
glabrous (at least apparently) or rigidly ciliate, 
nerves rough ; loosely csespitose, often stoloni- 
ferous ; stolons with thin strongly nerved 
appressedly hairy or glabrescent cataphylls ; 
blades up to 5 lin. wide 
Racemes more or less loose ; rhachis marginate, 
•l-j lin. wide ; spikelets very loosely appressed 
or spreading. 
Spikelets rather dark, brownish or purplish- 
green, apparently glabrous or obscurely silky 
on the sides ; barren valve rather firm, promi- 
nently nerved ; culms rather bare at the 
base 
Spikelets very pale, distinctly silky ; barren 
valve very thin. 
Spikelets loosely appressed, hairs mostly 
appressed, obscuring the side-nerves ; culms 
coated at the base with the remains of 
oomentose cataphylls and sheaths 
(g) VERRTTCIPILiE. 
(/?,) PENNATiE. 
(i) Flaccidul^:. 
II. Setariopsis. 
1. D. eriantha. 
2. D. milanjiana. 
3. D. seriata. 
4. D. nodosa,. 
