314 GRAMINE® (Stapf). 
coin a II. Mature ~~ breaking up, leaving the persistent or subpersistent 
glumes on the edicel, o if falling entire, then not consisting of 2-hetero- 
ise aie ae as in Series I. 
A. Blades never fouepeceely veined (in the South African species, 
xcept sometimes in Arundo), nor articulated on the sheath. 
(XXIIL SOV EL) 
a. Awns, if present, kneed — twisted ae the knee, or straight in reduced 
gms. (XXII el 
Flovets 2 or mor re. (XXIIT.—XL.) 
ARUNDINELL Florets 2, net a the lower peer 
species) awned, at length firm or hard; awn from the sinus between 2 sometimes 
minute or sete ges ai rarely from the entire, obtuse tip, usually kneed and 
twisted below the k 
® Spikelets solitary on dist 
XXII. Arundinella. ier small (23 lin. to lee ‘thea F Hi: ). Valve of in 
upper floret 2-setose, minutely 2-toothed or entire, awn sometimes editaed 6 
absent, Flaps of f the inte auric 
XXIV. Trichopteryx.—Spikelets large (2 lin. to 14 in.). Valve of the upper 
ryx. oy 
floret always "distinctly 2-toothed or 2- lobed, awh site ays kneed. Flaps of the 
pale not auricled., 
**® Spikelets in clusters of 3. 
XXV. reg achya. —Spikelets as in Trichopteryx. 
Tribe AVENEZ. Florets 2 to tg all alike (except the uppermos 
which ck are gra ally reduced) or mo r less heteromorphous raceme! in 
Holcus, Chetobromus, and sometimes des: i aie very distinctly in Anthowvan- 
su hyali ns, 5- or more u 
3-nerved (with the ih =~ ‘ete e and not submarginal); awn, if present, 
from the back or hee between bristles, kneed and usually 
twisted below the Pent (See MK lie. 
* Valves awnless or awned ; awn, if present, from the back of the valve. 
XVI. Prionanthium.—Florets 2, equal. Glumes cartilaginous on the back; 
keel with obtuse, pectinate teeth. Valves awnless. ‘ 
XXVIII. Achneria.—Florets 2, a. Glumes firmly membranous, shining+ 
keel smooth or almost so. Valves awnless, 
. Aira —Floret Rha chilla obscurely om beyond the upper 
floret. Valves awned (occasionally the lower awnles 
XXIX. Holeus.—Spikelets deciduous as a whole. Florets 2; the upper usually g, 
awned, the lower ¢, awnless. 
XXX. Anthoxanthum.—Florets heteromorphous; the lower 2 male 
barren, awned, the rH Tminal hecinspvodia,, awnless. 2Rhachilla not eke 
beyond er does obl reti. 
P.O ria. Flo vets or more, the uppermost dakar reduced. 
bd 
< 
— 
_— 
— 
SY pes 
hy 
iS 
pS 
an 
bo 
Rhachilla pea or almost so. Valves 3-5-nerved, awnless or mucronate or 
minutely a from, o nya below ieee — Panicle spicifor 
XIL. Trisetum.—Flore's 2 or uppermost pratt ually r 
e reduce 
Rhachilla ciliate. Valves 8-S.nerved, deal from the back, tips often wer’ 
2 fine bris ase Pi i glabrou 
XXXIIIL. Ave — Spike) we rect or suberect. Flores 2 or more, tiie 
uppermost gray ak Slane usually 1-3-nerved. Valves herbaceos 
oe cag ed, rathe , awned from the back. Ovary top hairy. Per = - 
. Avena. — Spelt _ La Bian florets 2 or more, the pie 
gradu reducec erved. Valves herbaceous, 5—9-nerved, ra 
the pe ary top hale. ebiais) fear annual, 
- Becta pias ,rarely mucronate ; m the sinus of the more or 
ess distinctly 2. zs bed Seria Rites oe “bristle like. 
