20 



GRASSES OF IOWA. 



or sub-hyaline. Styles very long. Stigmas distinct, with short, papillose- 

 villous hairs. Grain glabrous or oblong, closely embraced within the 

 hardened covering inclosing the pistillate spikelets. Tall, leafy and much 



Fig. 13. Coiz lachryma-jobi L. , Job's tears, —a, A pair of staminate spikelets ; 6, 

 ovary; c, pistil, with rudimentary stamens. (Div. Agros. U. S. Dept. Agrl. ) 



branched grasses, usually with many pedunculate spikes from the upper 

 leaf-sheaths. 



Species 3 or 4; three confined to the East Indies, the fourth is 

 widely distributed throughout the tropics of both hemispheres: the Coix 

 lachryma jobi cultivated in Iowa. 



4. TRIPSACUM. 

 TripsacumL.Syst.2: 1261. 1759 (Ed. 10); Scribner, Bull. U. S. Dept. Agrl. 

 Div. Agros. 20:13 f 3. Endlicher. Gen. PI. 106. Bentham & Hooker. Gen. 

 PI. 3: 1113. 



