IIOHDE.E. 637 



symmetrical, 7-11 mm. long, first strongly 5-G-nervcd, second . •< 

 nerved, acute or notched, margins si-arious; lloral glume uboui t 

 cm. long, those above shorter, 5-nerved at the cuspidate or short- 

 awned a])ex. 



Found in Europe, north Africa, Asia, and extensively natural- 

 ized in (uUivatcd grounds in Xorth America. 



Vcniiont l^rhiyle ; Massachusetts, lical Ifil ; f'ennsylviiiiia, 

 Srrilnici' for T'. S. Dept. Agricul. TG7; iMicliigan, Bcallb\), HiO, 

 Clark ;2:'.10; Towa, Ililclicock; ^Minnesota, ArlliKr Ji 511; Mon- 

 tana, Aiidcr.sdn, 9. 



For an extended iiotice see Vol. T.. p. 107, Fig. 7G. 



A'ar. tenerum (Vasey). A. tcnerum Vasey, Coult. liot. (iaz. 

 10:;.'r)8 (1SS5). 



t)estitute of rootstocks; blades usually narrower and shorter 

 and rather more rigid; spike riither inoi-e slender, sometimes 

 tinged Avith purple. After growing i)atches, from seed obtained 

 from more tlnin one source, in a variety of soils for more thnn 15 

 years, 1 am umiljle to indicate any differences other than those here 

 given to distinguish this from A. rcjwns L. 



A promising grass for cultivation. 



Coloriido, Cd.ssidi/; Montami, Anderson 37; Arizona, Tourney y 

 Sandhurg "X'-IS), WM; California, Lotinioii. 



4. A. glaucum (Desf.) K. & S. Hyst. 2: 753 (1817). Trilicnm 

 (jhiiiriiiii Desf. Tabl. Bot. Mus. IG (1804). A. rcpens, various 

 authors. 



A smooth usually glaucous perennial, 30-l()0 cm. high. r'ree[)- 

 ing rootstocks numerous. Sterile shoots numerous; leaves of the 

 culm :!-+ in number, blades 3-12 cm. long, narrow, involute. Spike 

 1;.'-14 cm. long, with internodes about 7 mm. long, the lower some- 

 times twice as long. Spikelets occasionally ".' ala node, 2 cm. long, 

 5-tt-ilowered, smooth or rough, llorels in the middle of the spike 

 overlajiping for three-fourths of their lengt^'; empty gluni(>s nar- 

 I'owly lanceolate, first 7 mm. long, l)-nerved, second 10 or nH)re 

 nun. Inn-', 5-nerved, incfiuihiteral ; tlorid glnmi' a litlh^ longer 

 than the empty glumes, lanceolate, obtuse, acute or avvu-j)oiuted, 

 5-nerved. 



