m 



TRIANDRIA MONOGYNIA. 



the margins finely serrulate, scabrous on the upper surface, glabrom 

 on the lower; sheath open, generally twice as long as the joints, 

 hairy along the margins and at the contracted throat. Rachift angled, 

 iiairy, particularly at the angles. Involucrum one valved ? split oa 

 the interior side, containing generally 1 calyx ? sometimes 2. Ca yx 

 S valved, 2 flowered, il fertile, the other sterile,) unequal, shorter, 

 than the corolla; exterior valve shorter, gibbous at base, acute, gla- 



concave 



nerved. 



rf the hermaphrodite fl 



jvalve acute, 9 nerved, infolding the interior? interior valve smaller, m 



ed 



back 



C7 



^fthe sterilpfl 



I 



valved, conca e, acute, 2 nerved, 



infolding the stamens. FiVamf^nis 5, transparent. Styles Q? slightly co- 



hermj;. 



Stigmas glandular, feathered. ' Seed oval, covered by the 

 persistent glumes and involucrum. 



Grow sin sandy pastures, lyiost abundant along ^^^ «^^ roast. 

 Flowers Julv 



•October, 



Cockspur hiVt 



SPARTINA. SCHREBER. 



I 



Flores in spicis unila- I Flowers in spikes, 



ar 



terifloris. Calyx S-val- 



raiiged 



on 



one 



side. 



vis, in^qiialis, carinatus | Califx 2 valved, unequal; 

 1-florus. Corolla 2-Yal- I keeled, 1 flowered. 



Co. 



vis, insequalis. 



1. JVKCEA. 



rolla 2 valved, unequal. 



8. foliis lineaiilnis, pie- I Leaves linear, conmioiv 

 rumque convolutis; spicis ly convolute; spikes fe^^ 



! 



pautis, alternis, patenti | alternate, expanding; 

 kus; floribus digynis. E* | flowers with 2 styles, 



Dactylis c^Hosuroides, Walt. p. 77. 

 Trachynt.tia jiincea, Mich. 1. p. 64. 

 Limuetis juncea, Pursh. 1. p. 59. 



Stem about 2 feet WgJ, 



on to* 



under surface glabrous, on tlie upper a Utrle giaucuusVand rougl'ef^ 

 alon^tlie elevated nerves; when dry convolute ; sheaths longer two 

 Hie joints, glabrous, ciliate at tlie ttir(»at. 



Root perennial, forming very thick tufts. 

 columnar. L^Iabrous. Leaves 12— 18 indies long, very acute 



pikes 



3 



■4. 



Flowers i» 



d 



triiingular lachis, of which tlie broad hasp is nalcpil • fJm summit ol ^ 



