POACEAE. 



39 



1. Lolium multifldrum Lam. 



AwNED Eay-grass. Awned Darnel. 

 (Fig. 58.) Culms tufted, 2°-3i° tall. 

 Sheaths smooth and glabrous; leaves 

 4'-8' long, lV'-4" wide; spikes often 

 1° long; spikelets 20-30, 7"-10" long, 

 the flowering scales bearing an awn 

 equalling or a little shorter than them- 

 selves. 



Roadsides, Abbotsford, Mount Hope 

 and south side of Harrington Sound, 1914. 

 Introduced. Native of Europe. Flowers 

 in spring and summer. Appears as of 

 recent introduction. Naturalized in the 

 United States. 



31. HORDEUM [Tourn.] L. 

 Annual or perennial grasses, with 

 flat leaves and terminal cylindric spikes. 

 Spikelets 1-flowered, usually in 3 's at 

 each joint of the rachis, the lateral gen- 

 erally short-stalked and imperfect; 

 rachilla produced beyond the flower, the lower empty scales often reduced to 

 awns and forming an apparent involucre around the spikelets. Empty scales 

 rigid; flowering scales rounded on the back, 5-nerved at the apex, awned; palet 

 scarcely shorter than the scale, 2-keeled. Stamens 3. Styles very short, dis- 

 tinct. Grain usually adherent to the scale, hairy at the summit. [Latin name 

 for barley.] About '20 species, widely distributed in both hemispheres. Type 

 species: Hordeum vulgare L. 



1. Hordeum pusillum Nutt. 

 Little Barley. (Fig. 59.) Culms 

 4-16' tall, erect, or decumbent at 

 the base; leaves V-3' long, V'-l" 

 wide, erect, smooth beneath, rough 

 above ; spike 1-3' in length ; spike- 

 lets usually in 3 's, the central one 

 containing a palet and perfect 

 flower, the lateral imperfect ; scales 

 awned, the empty ones scabrous, 

 thope of the central spikelet and 

 the lower ones of the lateral spike- 

 lets dilated above the base; flower- 

 ing scales smooth, that of the cen- 

 tral spikelet 3"-4" long, short- 

 awned, the corresponding scale in 

 the lateral spikelets smaller and 

 very short-stalked. 



Waste grounds, St. David's Is- 

 land, abundant in 1009. Introduced. 

 Native of western North America, 

 and naturalized along the Atlantic 

 coast. Flowers in spring. 



