530 POACE.E. 



r. Ligule 2.5 nun. long, ruys 2-5, floral 



glume 3-5 mm. long. 40 



r. Ligiilo ;} mm. long, rays 3-5, floral glume 



5.5-6.7 mm. long 41 



r. Ligule 4 mm. long, rays 2, floral glume 4 



mm. long 42 



r. Ligule 5 mm. long, rays 4-5, floral glume 



3.5-4.5 mm. long 43 



1. P. ANxrA L. Sp. PI. (i8 (1T53). Low Spear-cuiass. 

 Annual Poa. /*. Kupind Selirad. PI. (ierm. 1:280 (ISOC). P. 

 fn'tniffuhin's (iilil). Excrcit. 2: 531. /'. diiriuftcula AVillil, Spring. 

 Syst. 1:339 (1S24). P. huinilis Lej. PI. Spa. 1:4'J. P. ovalU 

 TiiK'O, PI. Par. Sicil. 21 (184<5). 



A soft smooth bright, light-green anniuil, sometimes glaucous; 

 culms weak, compressed, 5-30 cm. higli. Ijigule 2-3 mm. long : 

 blades of the sterile shoots half or two-thirds as long as the t-ulm, 

 often with wavy margins, those of the culm 3, flat or conduplicate, 

 abruptly acute, the upper 1-4 cm. long, about 2 mm. wide. Pani- 

 cle sometimes pur[)lish, ovoid or ])yramidal, subsecund. 2-5 cm. 

 long, rays mostly in pairs, the longest 2.5 cm. long, sometimes 

 drooping, bearing spikelets on t])o upper half, Spikelets very 

 short-pe<licellod, 4-6 mm. long. 3-7-flowered, oval or ovate-lanceo- 

 late, joint of rachilla O.T mm. long; empty glumes compressed, 

 first 1-3-nervcd, second 3-nerved, broadest at or above the middle, 

 usually 2.5 mm. long; floral glume ovate-oval, smooth, err ;e at 

 apex, 2.8-3.1 mm. long, with soft hairs on the keel for half or two- 

 thirds of its length aiul on the lower part of the lateral nerves, 

 the 4 lateral nerves parallel or divergent, evanescent one-third of the 

 way from tiieapex; palea 2.5-2.8 mm. long, ciliate or pubescent 

 ou the keels. 



Cultivated and waste grouiuls, almost everyAvhere. 

 In central Michigan three or more crops may l)e grown from the 

 seed iu cue season. Li shady places, where carefully watered, it 

 produces a very nice lawn, especially noticeable owing to the pleas- 

 ant light-green foliage. 



Vermont, Pr'uKjh'.; Pennsylvania, Scribncr for U. S. Dept. 



