158 TRIANDRIA. DIGYNIA. andropogon. 



jidortive flower a. mere rudiment without valves. Glumes ot 

 the fier/ect flower equal, almost cartilaginous, clothed with 

 long hairs, thickened at the summit. Corolla much shorter 

 than the calyx, hairy; inferior valve bifid, awned below the 

 division; awn. much contorted and bent obliquely. Stamens 

 -T; anthers yellow, (opening at the summit. Ell.) ^eed 

 oblong. 

 IIab. in dry sandy fields, and on rocky hills. September- 

 October. ' 



54. HORDEUM. L. 



Spikelets 3 at each joint of the rachis^ 1-flowered, all 

 perfect, or the lateral ones abortive. Glumes (involu- 

 crum Trin. &.c.) lateral, subulate. Perfect flower: 

 Corolla 2-\di\wfidi; inferior valve terminating in a bristle, 

 ^m/ coated. Sp. pL 129. Nutt. Gen. I. p. 87. P. 

 de Beaiiv. t. XXI. f. 1, 2. Roem. Of Schult. 

 Gen. 361. Trin. Agrost. 48. Habit very much 

 resembling that of El y m u s. Barley. 



U.jubatum L. : lateral flowers abortive, neuter ; bristles 



of the calyx and corolla 6 times as long as the flowers. Sp. 



pi. p. 12G. Willd. Spec. I. p. 476, (excl. syn. Schreb. 



et Buxb.) Ait. Kezv. 1. p. 180. Big. Bost. p. 28. 



Pursh'FL I. p. 89. R o tm. ^ S c hul U II. p. 792. 

 Root biennial. Culm two feet high, slender, simple. Leaves 

 4 — 6 inches long, 3 lines broad, and, as well as the sheaths, 

 smooth. Stifiule short, ovate. Sfiikes about 2 inches long; 

 rachis slender; joints short, compressed, ciliate, deciduous. 

 S/iikelets aggregated in threes. Abortive flowers shortly stipi- 

 tate. Calyx consisting of 2 slender bristles two inches in 

 length. Corolla 1-vaIved, with a short bristle at the tip. 

 Glumes of the fierfect flower approximate at the base, a little 

 longer than those of the lateral flowers. Corolla (calyx 

 Tr i n.) 2-valved ; Inferior valve lanceolate, obscurely 3-nerved, 

 terminating in a very long bristle; superior valve shorter, 

 acute, entire, with a groove on the back, in which is lodged a 

 short slender bristle, perhaps the rudiment of an abortive 

 floret. Stamens 3; ara^Aers oblong, yellow. Germen villous; 

 styles very short ; stigmas compound. 

 Hab. In marshes near Boston, Massachusetts. Bigelovf. 

 Resembles H. murinum, which has shorter bristles, and the 

 glumes of the perfect flower ciliate. It is a species of 

 Zeocritov, according to the system oi P. de Beauv oi s. 



