56 



TRIANDRIA, DIGYNIA. 



ly excavated. Cor. hermaph. glume 2-valved 

 smooth, one valve avvned. Stanu 3, anthers yel- 

 low and purple. Fist. 2 feathery. Cal. masc. 

 glume 2-valved, equal, pedicel hairy. Cor. masc* 

 2-valved, avvned. Stam. 3, yellow. Fist. 2, 

 abortive. Muhl. 



In similar places with No. 2. Perennial. August. 



macvouros, 4, A. panicle clustered ; spikes conjugate, clustered, 

 the flowers in pairs ; sheaths of the leaves sca- 

 brous, the margins hairy. Elliot' 

 Cinna glomerata, Walt. p. 59. 



Cluster -flowered Beard-grass. 



Three feet high. In the low damp grounds and boggy 

 places of Jersey, every where common. Perennial. Sept. 



*iisshiflorus, 5. A. panicle slender, appressed ; spikes solitary, 

 Mich. conjugate, as long as the sheath; flowers by 



pairs ; the hermaphrodite awned ; with the awn 

 straight, scabrous, caducous. Elliot. 

 A. Virginicus, L. and Muhl. Des. Ub. 

 Cinna lateralis, Gr. Walt. 



Slender-spiked beard-grass. Common Broom-grass. 



Indian-grass, 



From two to three feet high. Every where in dry and 

 poor soils very abundant. On the west bank of the Schuyl- 

 kill, just above Market street bridge, frequent. Perennial. 

 September. 



52. Aira, Gen. pi. 112. ( Gramine* . J 



Calix shining, 2-valved, 2-flowered. Corolla 

 awnless, or awned from the base, 2-valved. 

 Florets without a third rudiment between 

 them. 



