POACEAE 97 



4. Erianthus Michx. 



Awns flat, closely spiral at the base, geniculate; apex of the fourth 



scale deeply 2-cleft. I. E. divaricatus. 



Awns terete or flat only at the very base, not spiral at the base; 



fourth scale usually entire, rarely 2-toothed. 2. E. saccharoides. 



1. E. divaricatus (L.) Hitchc. In damp soil: N. J. to Okl. south 



to Fla., and Tex. 



Known in our area only from Hammonton, N. J.; not recently 

 collected. 



2. E. saccharoides Michx. In moist sandy soil: southern N. J. 



to Md., Fla. and Tex. Also in Cuba. 



N. J. Throughout the coastal plain, increasing southward. 



Pa. Berks and Chester counties. 



Tertiary, common: Cretaceous, less common: Older Formations, 

 rare and scattered, most common on Serpentine. 159-220 days. 

 About sea level. 



5. Schizachyrium Nees. 



Hairs at the apex of the rachis internodes 2-4 mm. long. 1 . 5. scoparium. 



Hairs at the apex of the rachis internodes 6-8 mm. long. 2. 5. littorale. 



i. S. scoparium (Michx.) Nash. {Andropogon scoparium Michx.). 

 In dry sandy fields: Me. to Sask. and Wash., south to Fla., 

 Tex. and N. Mex. 



Conn. Throughout. 

 N. Y. Throughout. 



N. J. Rare in Camden, Ocean, Gloucester and Burlington counties, 

 increasing northward; perhaps only adventive in the pine-barrens. 

 Pa. Throughout. 



2. S. littorale (Nash) Bicknell {Andropogon Uttoralis Nash). 

 In sand along the coast: Nantucket to N. Y., south to Va. 

 Conn. Near Fairfield on the beach. 

 N. Y. L. I. and S. I.; unknown elsewhere. 



N. J. Common along the coast dunes and in the pine-barrens 

 near the coast. 



6. Andropogon [Royen] L. 



Pedicellate spikelets empty, of I or 2 scales, much smaller than the 

 sessile spikelets, or wanting. 

 Sheaths at the upper part of the culm not enlarged; racemes 

 equally exserted. 

 Inflorescence oblong; branches divided into corymbiform 

 masses. 1. A. glomeratus. 



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