POACEAE 43 
awn: palea Ayala, small or wanting: pedicellate spikelet sometimes staminate 
and about as large as the sessile eae sometimes reduced or wanting, only 
the pedicel present. [Schizachyrium Nees]—About 150 species widely dis- 
1 SE 
forage grasses. 
Racemes single, from bract-like sheaths. — (Schieachyr ium.) I. SCOPARII. 
Racemes more than one n the spathe or several in a panicle on a 
naked peduncle.— (Andr II. FuRCATI. 
I. SCOPARII 
Leaf-blade A or folded, not tere 
First glume of sessile spicier ET abro 
In ra nodes of rachis glabrous or ciliate at base Va near apex only. 
Sessile Spikelet 4 Tur long: leaf-blades scarcely 
1m e. 1. A. tener. 
S essile spikelet about 6 mm. long: leaf-blades 
‘mostly 2-4 mm. wide. 
Internodes of rachis and sterile pedicel villous from 
ase to apex 
Rootstock pre 
2. A. semiberbis. 
Sessile SIRO about 1 cm. long. 
Glume of pedicellate 'spikelet 1- EAS 3. A. maritimus. 
Glume of Poan spikelet 3-awned. 4. A. littoralis. 
ie e spikelet Em . long. 5. A. stolonifer 
Rootstock w 6. A. scoparius 
First sos to TOE spikelet v illous. 7. A. hirtiflo 
Leaf-blade slender, terete, the upper surface a mere groove. 8. A. gracili 
II. FURCATI 
~ Pedicellate spikelet staminate, similar to the cous spikelet. 9. A. provincialis. 
Pedicellate spikelet reduced to 1 or 2 glume 
Racemes in pairs, the spathes aggregate in a flabellate 
i ce. 10. A. glomeratus. 
Pls in each SUE about 5 m long. 11. A. longiberbis. 
Peduncles in each spathe about 2 em. lon ng. lla. A. Tracyi. 
Silky hairs of the spike s Dd sparse not 
concealing the rachis and sterile pedicels. 
Plant green, more or less pilose od the leaf- 
sheaths or blades 2. A. virginicus. 
Plant glabrous, ofen glaucous. 
igule truncate, concealed within the 
folded blade. 13. A. capillipes. 
Ligule acutish, protruding from the folded 
e 4. A. perangustatus. 
Peduncle of the 2-4 racemes more than 1 cm. long, 
er. 15. A. brachystachys. 
Hs ma more than 15 mm. long. 
Sheaths, n the upper, long and 
flated, r less aggregate: rachis IS 
SI Batu. nud "fex xuous, the internodes 2-3 
mm. long. 
Nae not conspicuously inflated (or occa- 
onally so in A. campyloracheus). 
Rachis conspicuously ERE rand flexuous, 
the internodes 7-10 m n ong 17. A. campyloracheus, 
Rachis not conspi ieugusly: s sends racemes l 
densely silky. 
Racemes in 4's : plant stout, thg sheaths 
usually wo olly. 8. A. Mohrii. 
Racemes in pair 
First glume “of sessile spikelet 2- 
nerved between the keels: hairs 
16. A. Elliottii, 
