56 GRAMINEAE (GRASS FAMILY) 



half the length of the broad second one; lemma glabrous, acute or obtuse, 

 shorter than the second glmne. — ^Dry soil; in the eastern part of our range and 

 eastward. 



26. BLEPHARINEURON Nash 



Tufted perennial with simple culms, long leaves, and terminal loosely 

 flowered open panicles. Spikelets 1-flowered. Glumes membranous, 1-nerved, 

 acute, smooth and glabrous, the first narrower and shorter than the second; 

 lemma 3-nerved, the nerves densely pilose with long silky hairs for nearly 

 their entire length, the midnerve often shortly excurrent at apex; palet as 

 long as the lemma, 2-nerved, densely pilose between the nerves. Stamens 3. 

 Styles 2, distinct; stigmas plumose. 



1. Blepharineuron tricholepis (Torr.) Nash, BuU. Torr. Bot. Club 25: 88. 

 1898. Erect and slender, 3-6 dm. high, with narrow, glabrous leaves, and 

 more or less spreading panicles 6-18 cm. long: spikelets 2.5-3 mm. long: 

 glumes thin, carinate; lemma equaling or a little longer than the second 

 glume, entire or minutely 2-toothed at the obtuse apex.— Colorado, Utah, and 

 southward. 



27. POLYPOGON Desf. Bbakd Grabs 



Mostly annuals with decumbent or rarely erect culms, flat leaves, and spike- 

 like panicles. Spikelets 1-flowered. Glumes each extended into an awn; 

 lemma smaller, generally hyaline, short-awhed from below the apex, sub- 

 tending a shorter palet. Stamens 1-3. Styles short, distinct; stigmas plu- 

 mose. Grain free, inclosed in the glume and palet. 



1. Polypogon monspeliensis (L.) Desf. Fl. Atl. 1: 67. 1798. Caespitose 

 glabrous aimual 1-6 dm. high: leaves 4-15 cm. long, 3-6 mm. wide, scalbrous, 

 especially above: panicle 2-10 cm. long, dense, spike-like, the branches about 

 1 cm. in length, ascending: spikelets crowded: glumes about 2 mm. long, ob- 

 tuse, slightly bifid, scabrous, bearing a more or less bent awn 4-6 mm. long; 

 lemma much shorter, erose-truncate, hyaline, bearing a delicate awn about 

 0.5 mm. long, inserted below the apex. Beabd Grass. — ^Introduced into fields 

 and waste places; infrequent. 



28. CINKA L. Indian Reed 



Tall perennials with numerous flat leaves and many-flowered, nodding pani- 

 cles. Spikelets 1-flowered. Glumes keeled, acute; the lemma similar but 

 usually short-awned on the back, subtending a palet and a stalked perfect 

 flower; palet a little shorter, 1-nerved. Stamens 1. Styles short, distinct; 

 stigmas plumose. Grain narrow, free, inclosed in the lemma and palet. 



Panicle contracted, its branches erect 1. C. arundinacea. 



Panicle lax, its branches drooping 2. C. latifolia. 



1. Cinna arundinacea L. Sp. PI. 5. 1753. Cuhns 1-2 m. high, rather ro- 

 bust, leafy to the top: panicle 2-3 dm. long, quite dense: spikelets 4-6 mm. 

 long: glumes scabrous, tnroughout; lemma about equaling the second glume; 

 awn seldom exceeding the lobes of the emarginate lemma. — Swamps; across 

 the continent. 



2. Cinna latifolia (Trev.) Griseb. in Ledeb. Fl. Ross. 4: 435. 1853. Rather 

 slender, smooth, 6-12 dm. high, the culms erect and simple: leaves 10-25 cm. 

 long, 4-12 mm. wide, scabrous: panicles 1-2 dm. long, open, the capillary 

 branches generally spreading, flexuous and often drooping: spikelets 3 mm. 

 long: glumes scabrous, the outer acute, strongly hispid on the keel, about 

 equaling the second ; lemma usually exceeded by the second glume, bearing a 

 rough awn 1-2 mm. long from the 2-toothed apex. — Damp woods; rare within 

 our range ; northward and east to Newfoundland ; also in Europe. 



