56 GRAMINEAE (GRASS FAMILY) 



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

 shorter than the second glume. 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, Bull. 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. BEARD GRASS 



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

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

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

 vtending 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. All. 1: 67. 1798. Caespitose 

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

 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. BEARD GRASS. Introduced into fields 

 and waste places; infrequent. 



28. CINNA 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. PL 5. 1753. Culms 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 throughout; 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 

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



