Leptochloa 



Chlorideae 



141 



50 



Map 248 

 Anstida ramosissima Engelm. 



50 



Map 249 



Aristida oligantha Mich*. 



its habitat is found. It is usually found in hard, white clay soil in aban- 

 doned and fallow fields, on washed slopes, along clayey roadsides, and 

 locally in sandy soil in the northern counties. 

 Mass. to S. Dak., southw. to Fla. and Tex. 



6. CHLORIDEAE Kunth. Grama Tribe 



Spikelets disarticulating below the glumes; large coarse grasses, usually more than a 



meter high 99. Spartina, p. 143. 



Spikelets disarticulating above the glumes; grasses shorter than the preceding. 



Spikes digitate or, in Eleusine, one or rarely 2 spikes remote (rarely as distant as 

 2.5 cm) . 

 Spikelets 1-flowcred. 



Spikelets awnless 95. Cynodon, p. 143. 



Spikelets awned 102. Chloris, p. 144. 



Spikelets more than 1-flowered. 



Rachis extending beyond the florets into a naked sharp point; second glume and 



at least the lowest lemma cuspidate 94. Dactyloctenium, p. 142. 



Rachis not extending beyond the florets and not ending in a sharp point; glumes 



and lemmas not cuspidate 93. Eleusine, p. 142. 



Spikes racemose, on an axis more than 5 cm long. 



Spikes ascending or widely spreading, slender, elongate. 



Lemmas with an awn 4-6 mm long 101. Gymnopogon, p. 143. 



Lemmas awnless 90. Leptochloa, p. 141. 



Spikes drooping, dense, short 104. Bouteloua, p. 144. 



90-307. LEPTOCHLOA Beauv. Sprangletop Grass 



[Hitchcock. North American species of Leptochloa. U. S. Dept. Agric. 

 Bur. PI. Ind. Bull. 33: 1-21. 1903.] 



Sheaths papillose-pilose; second glume acute; grain 3-angled, grooved on the side 



toward the palea 1. L. filiformis. 



Sheaths smooth; second glume obtuse; grain compressed, not grooved. .2. L. panicoides. 



1. Leptochloa filiformis (Lam.) Beauv. Red Sprangletop. Map 250. 

 Infrequent in the counties along the Ohio River. It grows in sandy soil 

 on the slope of the bank of the Ohio River where it is washed at flood 



