12 SELECTED WESTERN FLORA 



6. PHRAGMiTES. Reed Grass. 



Spikelets 3-7-flowered; bracts naxrow, purplish. Tall, leafy, 

 perennial grasses with large, terminal, rather soft-hairy panicles. 



1. P. communis, Trin. 



Stems very tall, stout, erect, 4-12 ft. high, from a creeping rootstock which 

 frequently runs a long distance on the surface of the ground; leaves large, 

 flat, with overlapping/ sheaths; panicle large, 6-12 in. long. Marshes, 

 Man.-Alta. 



7. AGROPYRON. 



Spikelets 3-many-flowered, sessile, and alternate in the notches of 

 the rhachis ; flowering scales rigid, sometimes awned, the two lower 

 empty ; stamens 3 ; styles short and distinct ; stigmas feathery. 

 Mostly perennial grasses with flat leaves, and spikelets in close strict 

 spikes. 



1. A. repens, L. Beau v. CowcH Gkass, Qttack Grass. 



Bright green or more rarely glaucous ; rootstock long and stout, often with 

 very conspicuous scales, and bright yellowish green internodes. An introduced • 

 form, often very troublesome owing to its habit of spreading by the root- 

 stock. Cultivated fields and waste places. 



2. A. Smithii, Rydb. 



Resembling the preceding, but glaucous throughout with bluish green 

 leaves ; rootstock more slender with less conspicuous scales, and internodes 

 not yellowish or greenish. (Agropyron repens, var. glaucum, Schribn.) 

 Moist land, Man.-Alta. A somewhat troublesome grass in cultivated fields. 



8. LOLIUM. Rye-gkass. 



Spikelets several-flowered, solitary, alternate in the notches of 



, the rhachis ; flowering scales rigid, the lowest empty in the lateral 



spikelets, the two lower empty in the terminal spikelet ; stamens 3 ; 



styles short ; stigmas 2. Annual or perennial grasses with flat leaves 



and spikelets in strict terminal spikes. 



1. L. temulentum, L. Darnel. 



Stem erect, 1-3 ft. high, simple, glabrous; sheaths shorter than the in- 

 ternodes ; spikelets 2-8-flowered, the empty scale long and strongly nerved ; 

 flowering scales without awns. Often a troublesome weed with bitter poi-_ 

 sonous seeds. Introduced locally. 



9. AVfeNA. Oat. 



Spikelets 2-many-flowered, the lower flowers perfect, the upper 

 often staminate ; glumes long, usually exceeding the flower ; lemmee 



