170 TWELFTH ANNUAL REPORT. 



E. Canadensis, L., var. glaucifolius, Gray. Nodding Wild Rye. 



Throughout the state. Lake of the Woods (sandy shore), Dawson; Martin county, 

 and Emmet county, Iowa, Cratty. 



E.Sibiriciis,L. Wild Rye. 



Red river valley, at Pembina, Havard. North. 



E. striatus, Willd. Wild Rye. 



Throughout the state. St. Croix river, Houghton; Ramsey county, Oestlund; Minne- 

 apolis, Simtnons; Blue Earth county, Leiberg; New Ulm, Juni; Martin county (plentiful), 

 Cratty. I Lake Superior, Tr?iit?iey; Manitoba, iHacoun..] 



E. striatus, Willd., var. villosus, Gray. Wild Rye. 



Also throughout the state. Pembina, Havard; lake Minuetonka, Roberts; Blue 

 Earth county (frequent), Leiberg. 



E. mollis, Trin. Wild Rye. 



Lake shores [probably lake Superior], Minnesota, Wood's Class-Book. [North of 

 lake Superior, Agassiz.] 



E. Sitanion, Schultes.* Wild Rye. 



From northern Minnesota to Texas and west to California, Watson; Blue Earth 

 county and westward, Leiberg. West. 



ASPRELLiA, Willd. (Gymnostichum, Schreb.) Bottle-bkush 



Grass. 



A. Hystrix, Willd. (G. Hystrix, Schreb.) Bottle- brush Grass. 

 Common, or frequent, throughout the state. 



D ANTHONIA, DC. Wild Oat-Grass. 

 D. spicata, Beauv. Wild Oat-Grass. 



Throughout the state, but mostly infrequent. Lake of the Woods, Dawson; Stearns 

 county, etc., Upham; Pipestone county, Mrs. Bennett. 



AVENA, L. Oat. 



A.fatim, L.f Wild Oata. 



Ramsey county (new state farm and adjoining land, growing in grain-fields' and on 

 waste ground, apparently naturalized and spreading), Oestlund. Extensively natural- 

 ized in California; also found in Texas and Wisconsin, in the latter state becoming 

 very troublesome in oat-flelds, Vasey; but not yet reported (so far as known to the 

 writer) in other portions of the United States east of the Rocky mountains. Its seeds 

 ripeu early and mostly fall before harvest, rendering its extermination more difficult. 

 It is supposed to be the original of the cultivated oat (A. sativa, L.). 



*Eltmus Sitanion, Schultes. Culms 4 inches to 2 feet high, tufted, and with the 

 leaves and sheaths glabrous or somewhat pubescent or scabrous; spike erect, 1 to 3 

 inches long, squarrose with its long recurved awns, jointed and fragile at maturity; 

 spikelets in pairs, 2- to 5-flowered, smooth or puberulent ; glumes entire or usually 

 parted to the base and the segments unequally 2-cleft, the divisions long-awned (1 to 3 

 inches); flowers 3 lines long, the awn of the lower palet equaling that of thu glumes, 

 with often a subsidiary awn or tooth on each side at the apex of the palet. A very 

 variable grass. Watson's Rep. in King's Expl. of the Fortieth Parallel. 



\ Avena fatua, L. An erect annual, 2 or 3 feet high, smooth except at the hairy 

 nodes, with flat slightly scabrous leaves and loose sheaths : panicle 8 to 10 inches long, 

 the few-flowered rays spreading equally ; spikelets about an inch long, the scarious 

 pointed glumes longer than the florets, often purplish at base : lower palet about 6 lines 

 long, firm at base, scabrous and covered with long brown hairs, its lobes tapering to a 

 sharp point ; awn about twice the length of palet, bent near the middle and twisted 

 below : grain very hairy. Thurber in Botany of California. 



