MICHIGAN WEEDS. 



-301 



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Fig. 21 (22). 



Rye. Secale cereale L. An erect, glaucous 

 fall annual, 1-2 m. high. Spikelets usually 

 two-flowered, in a cylindrical spike, sessile, 

 compressed, one at each joint on alternate 

 sides of the rachis. A hardy plant, often a 

 weed in fields of wheat. Introduced from 

 Europe. 



Fig. 22 (25). 



Porcupine Grass. Stipa spartea Trin. A 

 graceful, erect, tufted perennial, 50-120 cm. 

 high. Leaves narrow, long acuminate, panicle 

 few-flowered, 12-15 cm. long. Rather scarce 

 in Michigan. A pernicious weed, on account 

 of its barbed "seeds." 



