MANUAL OF THE GRASSES OF THE UNITED STATES 



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stamens 3; pedicel long-villous, the 

 spikelet obsolete or nearly so. 01 

 — Dry sandy soil, open woods, mostly 

 Coastal Plain, Delaware to Kentucky 

 and Kansas, south to Florida and 

 Texas. Variable in the density and 

 length of pubescence on the rachis 

 and pedicels, the less hairy specimens 

 verging toward A. arctatus. 



19. Andropogon arctatus Chapm. 

 (Fig. 1158.) Resembling A. ternarius; 

 culms 1 to 1.5 m. tall; the blades 

 often wider and firmer; branches of 

 the inflorescence rather more slender; 

 racemes 3 to 5 cm. long, tawny; 

 sessile spikelets 4 to 5 mm. long, 

 brown, the awn 1 to 5 cm. long; 

 first glume concave, the pale or 

 tawny hairs of rachis and pedicels 

 shorter and less copious than in A. 

 ternarius; sessile spikelet 5 mm. long, 

 0.5 mm. wide, the glume grooved; 

 stamen 1. % — Low pine woods, 

 Florida. 



20. Andropogon floridanus Scribn. 

 (Fig. 1159.) Culms often stout, 1 to 

 1.8 m. tall; the upper one-third to 

 half bearing long slender branches; 

 blades elongate, 2 to 6 mm. wide; 

 inflorescence loosely subcorymbose of 

 usually numerous pairs of silvery- 



white to creamy racemes on sub- 

 capillary peduncles, mostly 2 to 8 

 cm. long, included in very slender 

 spathes or exserted, the ultimate 

 branchlets filiform, often long-ciliate 

 toward the summit; racemes 3 to 4 

 cm. long, the slender rachis not 

 flexuous, the joints a little shorter 

 than the spikelets, rather copiously 

 long-villous; sessile spikelets 4 to 4.5 

 mm. long, the delicate awn straight, 

 6 to 10 mm. long; pedicel long- 

 villous, the spikelet obsolete. 21 — 



Figure 1159. — Andropogon floridanus, X 1. (Type 

 coll.) 



Figure 1160. — Andropogon tracyi, X 1. (Type.) 



