12 



CHiETOCHLOA IMBERBIS PERENNIS (Hall) n. comb. Setaria perennis 



Hall, Trans. Kans. Acad. Sci. 13: 102 (1893). Chsetochloa versicolor Bick. Bui. 



Torr. Bot. Club. 25: 105, pi. 328 (1898). 



A slender, scarcely tufted, loose form, 6 to 12 dm. high, with very slender wiry 



culms, which are naked below, long, narrow leaves, and rather slender, long- 



exserted panicles, 2.5 to 7 cm. 

 long. Spikelets generally pur- 

 plish. Seise very slender, 6 to 

 10 mm. long, yellowish-green 

 or purple. 

 In brackish marshes, along the 

 coast from Connecticut to 

 Florida and Mississippi, and 

 in alkaline and saline bot- 

 toms, Kansas and Indian Ter- 

 ritory. June-September. 

 Specimens examined. — Maryland: 

 Bay Eidge, Scribner 1897; Ta- 

 koma Park, Williams 1899. 

 Florida: Barstow, 1232 Combs 

 1898; Homosassa, 924, 969 

 Combs 1898; Jacksonville, 13 

 Combs 1898; Lake City, 79 

 Combs 1898; Madison, 237 

 Combs 1898; Cedar Key, 794 

 Combs 1898; Ellzey, 826 

 Combs 1898. Louisiana: Al- 

 exandria, 185 Ball 1898. Miss- 

 issippi: BiloxijTracy 1898. In- 

 dian Territory: Bigelowl853- 

 54. Kansas: Comanche Co. 

 1544 Hitchcock 1896; Hutch- 

 inson, 2 Smyth 1890. 

 This form is not worthy of specific 

 rank, as all gradations are 

 found between it and the 

 typical C. imberbis. The char- 

 acters used by Bicknell in 

 separating his species, such 

 as the longer and fewer nerved 

 glumes, absence of hairs at 

 the base of the leaves, pur- 

 but are found to be extremely 



Fig. 2. — Ohcetochloa imberbis penicillata: a, spikelet sbowing 

 thesetaj; b, c, views of the spikelet; d, floweriug glume, 

 dorsal view. 



plish flowering glume, etc., are not constant, 

 variable. 



CHiETOCHLOA IMBERBIS GENICULATA (Lam.) n. comb. Panicum genicu- 

 latum Lam. Encycl. 4: 727 (err. typ. 737) (1797). Setaria genimlata Beauv. 

 Agrost. 51 (1812). ClmmxrapMs glauca genimlata Beal, Grasses of N. Am. 2: 

 156 (1896) . 



A stout, glaucous form, 5 to 10 dm. high, with geniculate culms, broader leaves, and 

 elongated panicles 6 to 12 cm. in length; leaf-blades 1 to 3 dm. in length, 5 to 8 

 mm. wide. Panicles erect, yellowish, 5 to 8 mm. in diameter. Spikelets as in 

 the type. 



