130 PANICACE^. 



of the enlarged callous bases, ovoid when mature, then easily broken 

 off and carried by the wind. Spikelets smooth, ovoid, acute, oblong- 

 lanceolate, 3-2.7 mm. long, pedicel 1-10 mm. long, first glume 

 1-5-nerved, about 1 mm. long, second glume 5-nerved, third 

 longer, 5-7-nerved; floral glume of fertile floret elliptical, 1.5 mm. 

 long. 



Very variable in size and appearance, as are most annual grasses 

 which are found in such a wide range of country. Very common. 



Philadelphia (Penn.), Scribner 48; Michigan, ClarJc 744, 

 Fcu'well for M. A. C, Beal 17; Washington, Lake; Minnesota, 

 Holzinger 0, 10 ; Utah, Jones 1313 ; Oregon, Hotvell ; Montana, 

 Anderson 73. 



Michigan Agricul. College in 1885. 



Var. vulgare Scribn. Grasses Tenn. 2: 44 (1894). Var. agreste 

 Gattinger, Tenn. Flora, 94 (1887). Stout and very hairy; panicle 

 very large and widely spreading; forming no tufts. Spikelets 1.7 

 mm. long. 



In fields and gardens. Tennessee, Gattinger. 



Var. campestre Gattinger, Tenn. Flora, 94 (1887). Var. Geni- 

 culatuni Scribn. 



Culms mostly simple, slender, 20-30 cm. high. Eoot-leaves 

 forming flat tufts appressed to the soil. Spikelets 1.7 mm. long. 



Tennessee, Gattinger ; Virginia, MiUspangh. 



Var. flexile Gatt. Tenn. Flora, 49 (1887). Panicum jt exile 

 Scribn. Grasses Tenn. 2: 44 (1894). 



A slender plant, thin, elastic and upright, sparingly hairy, 

 panicle thin, smaller, spikelets rather large, acute, much like P. 

 antumnale Bosc. Tennessee, Dr. Gattinger, U. S. Dept. Agricul. 

 49 from Gattinger. Found in the cedar glades. 



Var. minimum Engel. Gatt. Tenn. Flora. 94 (1887). P. 

 minimum. Scribn. A slender plant, 10-60 cm. high ; panicle 

 simple, with 6-10 single rays; spikelets usually less than 2 mm. 

 long. 



Tennessee, Gattinger 17; New Mexico, Lemmon 3152. 



Perhaps only a form grown on poor soil or where much crowded. 



46. P. sonornm. P. eajrillare miUace2im. Vasey ined. 



