i82 REPORT OF NEW JERSEY STATE MUSEUM. 



Erianthus divaricatus (L.). Spiral-awned Plume Grass. 



Andropogon divaricatum Linnaeus, Sp. PI. 1045. 1753 [North America]. 



A specimen of this species collected by the late Frank L. 

 Bassett, at Hammonton, is in the U. S. National Herbarium. 

 I have examined the spot where it is supposed to have been 

 obtained, but found only B. saccharoides. The species is certainly 

 very rare in the State. 



ANDROPOGON L. 



Key to the Species. 



a. Spikes solitary, scattered along the stem. 



b. Sheaths often greenish, spikelets 5-7 mm. A. scoparius, p. 182 



bb. Sheaths always glaucous, spikelets 8-10 mm. A. littoralis, p. 182 



aa. Spikes in clusters of two to six. 



b. Two to six on a long exserted common peduncle, purplish. 



A. furcatus, p. 183 

 hh. Two to three, included in spathe-like sheaths, scattered along the 

 stem. 



c. Spikes at length exserted, sheaths much inflated. A. elliotii, p. 184 

 cc. Spikes not exserted. A. virginicus, p. 183 



aaa. Inflorescence much branched and congested in a dense cluster. 



A. corymbosus abbreviatus, p. 183 



Andropogon scoparius Mlchx. Broom Beard Grass. 



PI. VIII, fig. 6. 

 Andropogon scoparium Michaux, Fl. Bor. Am. I. 57. 1803 [Carolina]. — 



Knieskern 40. — Britton 284. 

 Andropogon purpurascens Barton, Flor. Phil. I. 55. 1818. 



Common throughout the State, except on the coast dunes, 

 where it is replaced by the next. 



This species and A. virginicus are the Beard Grasses which 

 cover so many sandy fields with a tufted growth of buff or 

 purplish stalks, some two feet in height, that persists through 

 the winter. 



Fl. — Late July to early October. 



Middle District. — New Egypt, Brindletown, Hartford, Medford, Swedcsboro. 

 Pine Barrens. — Atco, Pasadena. 



Andropogon littoralis Nash. Seaside Beard Grass. 



Andropogon littoralis Nash, Britton's Manual 69. 1901 [Seashore of New 



York and New Jersey]. — Keller and Brown 31. 

 Andropogon maritimus Vasey, Grasses of U. S. 19. 1883. — Watson, Gray's 



Manual, Ed. 6. 637. 1890. 



