180 PANK'ACE.E. 



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

 off and earried by the wind. Spikelets smooth, ovoid, acute, oblonjr- 

 lanceolate, 2-3.7 mm. long:, iiedicel 1-10 nnn. lonfj, lirst 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. 



\'ery variable in size and appearance, as are most annual grasses 

 which are found in such a wide range of country. A'ery common. 



Philadelphia (Pcnn.), Swibiier 48; Michigan, Clark 744, 

 Fanrell for M. A. C, Beal 17; Washington, Lake ; ]\Iinnesota, 

 lMzi)Hjer 0. 10 ; Utah, J<j)ics 1313 ; Oregon, Howell ; Montana, 

 Audersnii 73. 



Michigan Agricul. College in 1885. 



^'ar. vulgare Scribn. (Irasses Tenn. 2: 44 (1894). Var. ar/rcsfe 

 Oattinger, Tenn. Flora, 04 (1887). Stout and very hairy; panicK> 

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

 mm. long. 



In flelds and gardens. Tennessee. Galliiir/t'r. 



Var. campestre Ciattinger, Tenn. Flora, 94 (1887). Var. (iciii- 

 nihf/inn Scribu. 



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

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



Tennessee. Gafliiu/rrj Virginia, MUlsj)an(jh. 



Var. flexile Gatt. Tenn. Flora, 49 (1887). Paninim Jlcrilr 

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



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

 panicle thin, smaller, spikelets rather large, acute, much like /'. 

 (Ht/Huniale l?osc. Tennessee, Dr. d'alfiin/rr. V. S. Dept. A(jr\cnL 

 4!i from Gattinger. Found in the cedar glades. 



Var. minimum Engcl. (Jatt. Tenn. Flora. 94 (1887). /'. 

 niiiiiman} Scribn. A slender plant, 10-00 cm. higli ; i)anic]e 

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

 long. 



Tennessee, (jafliin/cr 17 \ Xew Mexico, Lcmmon ^Xhl. 



Pcrhai)s only a form grown on poor soil or where much crowded. 



4(i. P. sonornm. P. capillare miUacvum. Vasey ined. 



