486 
staminate, awnless. Perennial; flowers in September. Culms 4 feet 
high. Wisconsin, Illinois, Ohio, Michigan and Minnesota. 
145. Andropogon Scoparious. Michaux. 
Syn. —A. purpurascens, Willd. Pollinia scoparia, Spreng. Broom- 
grass. 
Culms slender, with many branches ; lower sheaths and narrow leaves 
hairy ; spikes terminating the branches, very loose, slender, simple; ste¬ 
rile spiklet neutral, its lower glume awned, small on a very hairy pedicel, 
the fertile with three stamens, and a twisted awn. Perennial; flowers 
jn August. Culms 3 to 4 feet high. Wisconsin, Illinois, Ohio and 
Michigan. • 
Plate XII. Fig. 1. 
o 
146. Andropogon Virginicus. Linnaeus. 
Syn. —A. dissitiflorum, Michx. Anantherium Virginicum, Spreng. 
Sterile spikelet abortive, being only an awn-like plumose pedicel; fertile 
flower monandrous, straight awned, culms flattish below, sparingly short 
branched above: sheaths smooth ; spikes two or three together in distan^ 
appressed clusters. Perennial; flowers in September. Culms about three 
feet high. Ohio. 
147. Andropogon Macrourus. Michaux. 
Syn. —Cinna glomerata, Waltr. 
Sterile spikelet abortive, being a mere awn-like plumose pedicel; the 
fertile monandrous, straight-awned; culm stout, bushy branched at the 
summit, loaded with numerous spikes in dense leafy clusters; sheaths 
rough, the upper hairy. Perennial; flowers in September. Culms 2 to 
3 feet high. Ohio. 
GENUS 56. SORGHUM. Persool. 
[From sorghi, the Asiatic name of one of the species of this genus.} 
Spikelets two or three together, on the branches of an open panicle, 
the lateral ones sterile; glumes of the middle or fertile spikelet coriaceous 
or indurated, sometimes awnless ; stamens three. 
148. Sorghum Nutans. Gray. 
Syn. —Andropogon nutans, Linn. A. avenaceurs. Michx. Indian 
grass. Wood-grass. 
