223 



Fig. 217. LEPTOCIIX.OA DUBIA (H. B. K.) Nees, Svllog. Ratisb. 1 :4 1824 

 ( Chlons duhia H. B. K. Nov. Gen. et .Sp. PI. 1 : 169. 1815; Diplachne dubia Scribn 

 Bui. Torr. Bot. Club, 10 : 30. 1883. )-A rather stout and apparently perennial 

 species 3-9 dm. (10-3°) high, with usually eight to ten approximate spreading 

 spikes 6-8 cm. (2^-3^') long. Leaves 2-4 dm. (8'-16') long. Spikelets (a) 5-7 

 mm. (2i"-3i'0 long, 2 to 5 flowered; empty glumes {b) acute, slightlv unequal- 

 flowering glumes (c) emarginate, mucronate between the broad, obtuse lobes' 

 smooth, except on the slightly ciliate margins. The palea is shown by d - 

 Southern Florida, Texas to Arizona, and southward into Mexico. April to 

 September. 



