PANICE.E. 155 



serrate, 1-2 cm. long. Spikelets elliptical, acute or narrowly oval, 

 3.5 mm. long, glumes reticulate-veined, first glume broad, 1.5 mm. 

 long, ;}-5-nerved, second 3 mm. long, 5-nerved ; floi-al glume of the 

 neuter floret like the second and empty glume, only a little longer, 

 its palea slender, "Z mm. long; fertile floret with faint transverse 

 ridges, llesembling Hungarian grass. Index Kewensis in one 

 place includes this under Setaria vmcrostaehya. 



Pennsylvania, Scn'buer 3018; North Carolina, McCarthy; 

 Iowa, Hitchcock; Michigan, M. A. C. 23, 23, 24:, Cooley, Clark 

 753. 



Florida, Curtif^x 3017. 



Florida to Texas. 



9. C. GLAUCA (L.) Kuntze, Rev. Gen. PI. 707 (1891). Fox- 

 tail. Panicum (/hiiicion L. Sj^. PI. 56 (1753). Setana (jlauca 

 Bt'uuv. Agrost. 51 (IS 12). 



Culms erect, branching and compressed below, 30-00 cm. high. 

 Slieatl)s smooth, loose, the lower ones compressed and more or less 

 tinged with red; blades scabrous, flat, twisteil once or moi-e around, 

 broad at the b:ise, scabrous and, on large plants, often sparsely cili- 

 ate. 20-.')0 cm. long, 7-10 mm. wide. Spike simple, cylindrical, 

 usually tawny yellow, 3-10 cm. long, awnlike branches 0-13, with 

 the asperities directed upwards, 2-4 times as long as the spikeiet. 

 Spikelets solitary, flat on one side, oval, obtuse or almost acute, 

 2.5-3 mm. long, lirst glume broad, one-half to two-thirds ;is long 

 as the spikeiet, 3-iu'rved. second wider and a little longer, 5-iierved; 

 floral glume of neuter floret as long as the spikeiet, 5-nerv('d, its 

 l)alea nearly as long; fertile floret gibbous on one side, marked with 

 ])roininent transverse wrinkles. 



A common weed found in many parts of the world in which the 

 climate is temperate or tro[)ical. Starts much later and flowers 

 much later in the season than (\ riridls. 



District of ('olumbia, Vasri/ for U. S. Dei)t. Agricul. Ill; 

 Mexico, Prliif//c 131; Delaware, Canhy for Dr. Clark 1930; 

 Michigan, ('/(irk7o\, /Mr/ 24; Alabanni, Mohr. 



Var. leevigata (Muhl). Fanicuni livr'ujatum Muhl. Gram. 100 

 (1817). 



