46. 
1. Spikelets dissimilar, one of each group sessile and 
perfect, the other 1 or 2 pedicellate and either 
staminate, sterile, or reduced to a pedicel, 
2. Blades ovate; plant a weak, trailing annual. 
Expected (Arthraxon). 
2. Blades linear, elongate; plant erect, stiff, 
perennial. 
3. Racemes terminal and axillary; rachis with 
several to many joints, promptly disarti- 
CUMAETING . Te lerolelteysietaiel Nels elle cvelersiotle oe elveledsie sicte eleisle eer ANGrOpOson 
3. Racemes terminal only; rachis with 2 or 3 
tardily separating joints. 
4, Fertile spikelet awnless (awn very early- 
deciduous); pediceled spikelets staminate 
OR TSS TAMS oie wievele) eel sielsiolars lelsiaveicieliepelel cretislaia adele sie OO NUM 
4, Fertile spikelet with a long, persistent, 
basally twisted awn; pediceled spikelets 
usually rediced to hairy pedicels............ Sorghastrum 
Andropogon 
1. Racemes solitary on each peduncle; internodes and 
pedicels club-shaped....s.sicseccecccvesieesecccescseses A, SCOparius 
1. Racemes 2 to several on each peduncle, digitate; 
internodes and pedicels slender. (Also, 
pedicellate spikelet reduced to a pedicel or 
to empty glumes; racemes silky villous, not 
conspicuously aggregate at the summit of the culm). 
2. Peduncles mostly 5 to 15 cm. long. Expected 
(A. elliottii, A. ternarius). 
2. Peduncles not more than 1 cm. long. 
3. Upper sheaths conspicuously inflated. Expected 
(A. elliottii). 
3. Uppermsheaths, not anfila keds oy. yeccpereyejsse,oie.eceeueieie hol A AeA CUS 
Andropogon scoparius Michx. Bluestem, Bunchgrass 
Java Farm. Infrequent in Hog Island salt marsh. Associate 
species: Panicum virgatum, Myrica cerifera, Diospyros virginiana, 
Distichlis spicata. Higman 287, 292, 302. 
