139 



Fig. 133. LIMNODEA ARKANSANA (Nutt.) Dewev, Contr. U. S. Nat. 

 Herb. 2: 518. 1894. {Greenia arkansana Nutt. Trans. Am. Phil. Soe. 5: 142. 

 1837; Thurberia arfcansana Benth. in Vasey, U. S. Dept. Agr. Spec. Rept. 63 : 

 16. 1883.)— A slender annual 2-6 dm. (|°-2°) high, more or less geniculate at 

 the lower nodes, with soft, flat leaves and narrow, loosely flowered panicles 

 8-18 cm. (3'-7') long. Sheaths glabrous or sparingly villous; ligule about 1 mm. 

 ii") long; leaf-blades 2-10 cm. (l'-4') long, 2-4 mm. (l"-2") wide. Spikelets (a) 

 3-4 mm. (l^"-2") long; empty glumes equal, hard, and rigid; flowering glume 

 (b) glabrous, cleft at the apex, bearing a somewhat bent and twisted awn 

 5-10 mm. (2i"-5") long.— Shell banks, woods, etc., western Florida to Arkansas 

 and southern Texas. April to June. 



In variety pilosa {Selerachne pilosa Trin. Mem. Acad. Petersb. VI. 6 : 275. 

 1845,) the outer glumes (shown by c) are pilose. 



