i76 TRIANDRIA DIGYNlA. 



3 — r, generally 5; 4 digitate, and 1 below. Spikelets4 — 6 flowered, 

 (I have found them most commonly 5 flowered,) Calyx, valves un- 

 equal, acute, keeled ; keels scabrous. Corolla^ valves acute. Sia- 

 mens 3. Styles ^- 



. Grows in rich cultivated land very abundantly. It is a fine succu- 

 lent grass, and one of our best grasses for hay. It makes its appearance 

 much later in the spring than the crab-grass, but grows more luxu- 

 riantly and vig;orously. 



Flowers June — October. Indian Eletisine. — Crow-foot Grass, 



3. Cruciata. E. 



E ? spicis quaternis, pa- 

 tentibus, mucronatis ; spi- 



culis subtrifloris ; calycis 



Spikes by fours, 

 expanding, miicrouate ; 



spikelets generally 8 

 Talvula exteriore aiistata, j flowered ; the exteiior 

 coroUae acutissima. E. I valve of the calyx awned, 



of the corolla wtry acute. 



Chloris mucronata, Mich. 1. p. 59, 

 Pursh, 1. p. 



Boot annual. Stem 12 — 18 inches high, decumbent, finally assur* 

 gent, geniculate, taking root at the joint, glabrous. Leaves distintly 

 alternate, narrow, 4 — 8 inches long, 2 — 3 lines vvidcj acute, sligbtlf 

 undulate, hairy, ciliate; sheaths scarcely half as long as the joints; 

 stipules membranous. Spikes sometimes 2 — 3, but in vigorous plantt 



terior valve ovate, keeled, emarginate, awned j the interior sniaiij 

 acute, unawned. Corolla 2 valved ; the exterior valve keeled, wita 

 the keel serrulate, compressed^ slightly recurved, acuminate ; the in* 

 terior valve smaller* 



Grows in cultivated ground ; common. 

 • Flowers July — October. Cross-spiked Eleusine. 



MONOCERA. 



Flores Isiterales. Calyx I Flowers on one side or 

 S.valvisymulljflorus; val- the rachis. Calyx ^^'^' 

 vis sub apice aristatis. | ved, many flowered : w^ 



valves awned below tiie 



summit. 



Herm. Corolla bivaL I Herm. Corolla S v^- 

 vis 5 valvis injequalibus 5 | yed^ unequal 5 the c^^ 



