POACEAE 
Plant zn 
Plant perennial. 
reeping e prese 
Creeping rootstock "ninos plant tufted. 
Glumes nearly equal, 2 xd than the lemm 
Glumes unequal, the ond as long as the floret oe a 
little shorter. 
Second glume shorter th 
py 
Panicles open above, ana bel 
Spikelets 3 mm. long or more, pur Sos. Ad ‘bronze. 
I. VAGINAEFLORI 
Lemma pubescent, 
Lemma glabrous. 
II. VIRGINICI 
FaR dE narrow or spike-like: leaf-blades involute-pointed. 
cond ME shorter than the floret: rootstock short and 
Se 
Se ond clum as long as the floret or longer: 
long and branching. 
Panicle open: leaf-blades conduplicate, rather lax. 
rootstock 
III. IND 
Tufted perennials with tall virgate stems, erus long leaves, 
and slender elongate panicles. 
IY. ASPERI 
mma ipud pilose. 
Lemma glabrous 
V. GUTI 
Panicle-branches, c the lower, E 
Panicle-branches not whorled. 
VI. CRYPTAND 
Tufted perennial; sheaths conspicuously pilose x ide throat. 
VII. GRACILES 
Panicle-branches in whorls. 
nches not in whorls. 
la aes narrowly involute. 
-blades fla 
eee appressed to the branches: leaf-blades about 
Pedicels spreading: leaf-blades 2-4 mm. wide. 
101 
I. VAGINAEFLORI. 
II. VIRGINICI. 
III. INDICI. 
IV. ASPERI. 
ARG 
 CRYPTANDRT. 
T GRACI 
. S8. MELDE dd us. 
. S. neglectus 
3. S. macrus. 
4. S. virginicus. 
b. S. Torreyanus 
6. S. Berteroanius., 
^. 8. clandestinus. 
8. S. asper. 
9. S. argut 
10. S. dom noenee 
11. S. cryptandrus. 
12. S. gracilis. 
13. S. teretifolius. 
14. S. Curtissii. 
15. S. floridanus. 
1. S. vaginaeflorus (Torr.) Wood. Stem slender, erect, spreading or prostrate, 
20—60 em. m Ed blades 1-2 mm. 
e 2—4 em. long, partia 
5 em 3: 
enclos a the nflated sheaths, or the 
terminal ea. er abo ut 4 mm. 
long: gl acuminate, about equal: lemma 
about as long as the glumes, minutely ap- 
po erica palea acuminate, longer 
than the lem [S. inaeflorus minor 
Seribn.]— — Sterile open ground, pastures, 
and waste-places, various 
fields, barrens, 
to Tex., Ariz., Minn., and Me. 
provinees, Ga. 
2. S. neglectus Nash. Differs from S. va 
ginaeflorus chiefly in the pe spikelets 
and glabrous lemma: glumes broader pro 
portionately, about 2 mm. s rants 
more turgid, acutish, glabrous, about 
long; pa alea abo ut as long 
various provinces, Tenn. to Tex., N. D., and Que 
wide, those of the stem usually less than 
ally 
as the Ene tu open ground and sandy fields, 
