Calamagrostis Agrostideae 125 



1. Danthonia spicata (L.) Beauv. Poverty Oatgrass. Map 201. Infre- 

 quent to common in all parts of the state. It is common in poor soil in 

 open woods on the crests of ridges in southern Indiana, becoming less 

 frequent to rare in the rich, neutral soils of the central part of the state, 

 and again appearing as frequent on black and white oak ridges of the 

 northern counties. It is found also in post oak flats. 



Newf. to B. C, southw. to Fla., e. Tex., e. Kans., and in the mts. of 

 N. Mex. and Oreg. 



5. AGROSTIDEAE Kunth. Timothy Tribe 



Lemmas 1-nerved. 



Callus pilose 63. Calamovilfa, p. 126. 



Callus glabrous. 



Keels of glumes glabrous or more or less scabious 76. Sporobulus, p. 135. 



Keels of glumes softly ciliate 79. Heleochloa, p. 1027. 



Lemmas more than 1-nerved. 



Spikelets articulated below the glumes. 



Inflorescence a loose panicle 67. Cinna, p. 129. 



Inflorescence a dense spikelike panicle 69. Alopecurus, p. 129. 



Spikelets articulated above the glumes. 

 F'irst glume with 3 or 5 nerves. 



Inflorescence spikelike; lemmas about 2 mm long 72. Phleum, p. 130. 



Inflorescence paniculate; lemmas more than 2 mm long 85. Aristida, p. 138. 



First glume 1-nerved or nerveless. 



Lemmas indurate, much firmer than the glumes. 



Lemmas awnless, glabrous 81. Milium, p. 137. 



Lemmas awned, pubescent at least at the base. 



Awns readily falling; callus blunt 82. Oryzopsis, p. 137. 



Awns persistent; callus sharp-pointed, pubescent. 



Lemmas 1-awned 84. Stipa, p. 138. 



Lemmas 3-awned (sometimes the lateral pair short).. 85. Aristida, p. 138. 

 Lemmas not indurate, thinner than the glumes. 

 Spikelets (exclusive of awns) 9 mm or more long. 



Lemmas with an inconspicuous awn; glumes as long as the body of the 



lemma 62. Ammophila, p. 126. 



Lemmas long-awned; glumes minute or lacking 



80. Brachyelytrum, p. 136. 



Spikelets not over 5 mm long, usually less. 



Second glume 3-nerved 61. Calamagrostis, p. 125. 



Second glume 1-nerved. 



Glumes (at least the first one) slightly longer than the lemma; first glume 

 slightly longer than the second or glumes equal in length, awnless; 



lemmas thin ; palea obsolete or lacking in our native species 



64. Agrostis, p. 126. 



Glumes generally shorter than the lemma, the first one obsolete, or shorter 

 than the second; if the first glume is as long as or longer than the 

 lemma, the glume with an awn 1-2 mm long; lemmas rather firm; 

 paleas present in normal lengths 75. Muhlenbergia, p. 131. 



61-248. CALAMAGROSTIS Adans. Reedgrass 



[Stebbins. A Revision of some North American species of Calamagrostis. 



Rhodora32: 35-57. 1930.] 



Blades usually flat or sometimes involute toward the tips, mostly 4-8 mm wide; panicle 

 usually expanded or loose; spikelets usually 3-3.5 mm long, rarely only 2.5 mm 



