FESTUCE.E. 545 



loug. Anthers 0.6 mm. long. Distributed as P. ahhreviata 

 Tliurber. 



Colorado (Gray's Peak), Jones 714, 14,000 feet altitude. 



25. P. Chapmaniana Scribn. Bull. Torr. Club, 21:38 (1894). 

 Poa cristata Cluipni. FI. 8. States, 5(52 (1860), not Walt. 



An erect light green, nearly smooth annual, 10-20 cm. high. 

 Ligule 3 mm. loug; blades of sterile shoots one-quarter the length 

 of the culm. Slieaths of the culms 3 in number, usually shorter 

 than the internodes; blades flat or conduplicate, acuminate or 

 abruptly pointed, 3-5 cm. long, 1.5-2 mm. wide. Panicle obtuse, 

 linear or pyi'amidal, 2-8 em. long, rays in twos or threes, one of 

 the longest 2-4 cm. long, bearing spikelets on the outer half. 

 Spikelets shortly pedicellate or almost sessile, 3-3.5 mm. long, 

 3-5-flowered, narrowly or broadly elliptical or rhomboidal, joint of 

 rachilla 0.5 mm. long; empty glumes sifbequal, ovate, subacute, 

 3-nerved (first rarely 1-nerved), second 2.2 mm. long; floral glume 

 thin, webbed at base, pubescent on marginal nerves and two-thirds 

 of the keel, the 4 lateral nerves obscure, 2.5 mm. long, concave, 

 elliptical, the upper fourth scarious; palea thin, 1.7-2 mm. long, 

 jmbescent on the lower two-thirds of the keels when seen through 

 a lens. 



Much like Poa annua and likely to be confounded with it. 

 When compared, this species is more nearly erect, blades of sterile 

 shoots shorter, empty glumes narrower, with narrower scarious 

 margins, floral glume oval (not ovate) and shorter. 



Tennessee, Scribner; Mississippi (Tupelo & Starkville), Tracy; 

 Missouri, Hitchcoch. 



Tennessee, Florida, and Mississippi. 



26. P. Bigelovii Vasey & Scribn. Vasey, Cat. Grass. U. S. 81 

 (1885). P. annua var. strida Vasey, Scribn. Bull. Torr. Club, 31 

 (1883). 



A glaucous annual or perennial; culms flat, green or purple, 

 20-70 cm. high. Leaves of sterile shoots few, the blades 2-4 cm. 

 long, those of the culms 3 in number, flat or conduplicate, 3-10 

 cm, long, 1.5-2 mm. wide, apex acute (not abruptly acute as in P^ 

 annua) ; ligule 2 mm. long. Panicle linear, secund, very simple. 



