316 GRAMINEZ (Stapf). 
or obtuse, not changed when ripe, 1- or more or Jess distinctly 3-nerved, awnless, 
usually olive-green or olive-grey ; side-nerves, if present, delicate, evanescent 
above. Seed often free in the delicate pericarp. 
L. Sporobolus,—The only genus. 
Tribe 10. ERAGROSTE. sin variously panicled, — aan 
or subspicate. Florets usually numerous and far exserted fro glum 
U d valves rather similar in peony appearance. Valv eon ta 
cbartaceous, very olive-green or olive-grey, entire _ t, $-nerve 
nerves evan aboy excur into bristl side-ne submarginal, 
rve 
labrous or pubescent or finely ciliate below. Pales often ocetatent or su 
persisten 
ze Pogonerthria. —Spikelets — mort on the flattened ear of a 
i 
ecund false spikes, which are spirally arranged on a long a Ti 
a als joint fel with dees ae Vale ves acuminate, e1 
ae a —Spi ke lets more 7 rings remote on the aa rhachis 
a wally +t othed or minutely notched. 
LIL. Ere agrostis., — Spikelets See panicled, nee in simple spikes. Rhachilla 
often persistent. Valves usually numerous and closely imbricate, bro ad, entire, 
theca Pales persistent or deciduous, but odes. not falling estos with 
LIV. Desmostachya. —Spikelets crowded on and falling entire from the flattened 
axis ms ——" reading secund spikes, which are closely arranged on a long 
om 
Tribe ony pee Spikelets usually in 2-ranked, secund spikes or 
spike-like racemes, rarely distinctly pedicelled and panicled, Florets 1 to many- 
Valves generally membra anous, truncate, emarginate or toothed, 3-nerved ; nerves 
distant, subparallel, og a percurrent or excurrent and often ciliate all along, 
late ral subm margina ae Spartina with 1-nerved valves, and Hlewsine en oe” 
sometimes additional side-nerves close to the middle nerve of the valve) ; ‘a 
present, straight, sei from a truncate or toothed t 
* Spikelets crowded in 2-ranked, secund spikes. 
+ Floret 1, awnless, Rhachilla not papealatinke a — the floret or only as a minute 
point or a naked bri 
LV. Spartina.—Mature spikelets falling pe toni the rhachis. Valve 
1- rights 
LVI. Cynodon. dda shorter than the glabrous, subchartaceous valve. 
LVII, “Wisrock hloa.— Glumes longer than the ciliate, membranous valve 
++ Florets sieitigh one g, the others g or barren. 
LVIII. Ctenium.—Upper ean — rall pak a stiff bristle ee the back. 
Lowest 2 florets barren or the eu the t 
ga oe chloa.—Spike sitters, termin ig "Metis awnless, Lowest 
Ae 
Lx. ‘Chic is.—Spikes 2 to many, digitate or fascicled. Spikelets awned oF 
iilaae Lowest floret g. 
+ Several to many g — in each spikelet. op free within the delicate, 
ing or ae tied per 
. Eleusine.—Spikes terminated by a spikelet 
Ser Destrinearted, sae t of the rhatles of the spikes naked, projecting. 
** Spikelets oe pedicelled (though often very otha or or ” 
e flattened rhachis of a 2-ranked, secund spik 
LXITI. peng —Spikelets in long very slender approsinat spiel racemes. 
Valves pubescent, the upper 2-4 barren eae a tuft 0 
LXIV. Leptocarydium.—Spikelets subsessile n dense pach ni panicles. Florets 
distinctly Deas long) — from the la es. Valves long an nd finely 
awned ; 
base 
