252 
ARUNDO, giant reed 
¢Arundo donax L., giant reed, p. 116 
AVENA, oat 
+Avena fatua L., p. 140 
var. fatua, wild oat 
var. sativa (L.) Hausskn., oat [S, M: A. sativa L.] 
(Haussknecht, 1985) 
BECKMANNIA, sloughgrass 
*Beckmannia syzigachne (Steudel) Fern., American sloughgrass, 
p. 179 
BOTHRIOCHLOA, bluestem 
[S, G: ANDROPOGON] (Gould, 1967) 
*+Bothriochloa so (Retz.) S. T. Blake, Caucasian bluestem 
[G: Andropogon bladhii Retz.] (Dunn, 1982; Gould, 
1 
B. saccharoides (Sw.) Rydb., silver bluestem, silver 
beardgr. . 248 
ssp. torreyana pant Ne Allred & Gould [S: Andropogon 
saccharoides Sw.; G: A. Saccharoides var. 
torreyanus (Steudel) Hackel; M: B. saccharoides] 
(Allred and Gould, 1983) 
BOUTELOUA, grama grass 
Bouteloua curtipendula (Michaux) Torrey, sideoats grama, 
p. 182 
var. curtipendula 
B. gracilis pos Bonpl. & Kunth) Lagasca ex Steudel, blue 
. 184 
ama, 
B. —— rise hairy grama, p. 184 
var. hirsuta 
S: Steyermark G: Great Plains Flora M: Mohlenbrock 
