Class III. Order III. 39 



hairs as long as the valves ; culm and leaves smooth, 

 slender. 



Syn. JlRUNDO ClNNOIDES. Muhl. 



CALAMA>GROSTIS MEXICANA. Nutt. 



Found in low grounds, two or three feet high with the habit 

 of Cinna arundinacea. August. Perennial. 



ARUNDO COARCTATA. Tor. Glaucous reed. 



Panicle somewhat spiked, conglomerate ; calyx a 

 little longer than the corolla, carinate ; corolla longer 

 than the hairs, awned a little below the tip. 



Syn. JlRUNDO GLAUCA. Muhl. 



Four or five feet high, very slender, with a somewhat glau- 

 cous hue. In wet grounds. August. Perennial. 



Subgenus PSAMMA. Sectaries linear-lanceolate, longer 

 ijio.n the seed ; stigmas three. 



ARUNDO ARENARIA. L. Beach reed. 



Panicle spiked ; calyx acute ; hairs a third as long 

 as the corolla; leaves involute. 



Syn. PSAMMA ARENARIA. Beauv. 



Found on the sea beach among the drifting sand ; two or three 

 feet high, glaucous, with long narrow leaves and a whitish 

 panicle. Nahant. August. Perennial. 



Subgenus PHRAGMITES. Calyx from jive to seven flow- 

 ered. 



ARUNDO PHRAGMITES. L. Common Reed. 



Calyx containing five florets, panicle loose. L. 



A native of wet situations. Culm of the height of a man, 

 very erect and smooth. Leaves lanceolate, long and broad, flat 

 and sharp pointed. Panicle erect or nodding, conspicuous for 

 the long, slender, shining hairs which project from the flowers, 

 and give the whole a bright silvery appearance. Found at the 

 edges of deep waters, particularly on tbo north side of Fresh 

 Pond, where it resembles at a distance a field of standing corn. 

 Flowers in July and August. Perennial. 



