• CLASS III. ORDER III. 41 



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

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

 cle. — Nahant, Cape Cod. — August. — Perennial. 



A coarse paper has been made from this grass. 



^^ Subgemis Phragmites. Calyx from Jive to seven flowered. 

 Arundo Phragmites. L. Common reed. 



Calyx containing five florets, panicle loose. L. 



A native of Avet 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 the north side of Fresh 

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

 — Flowers in July and August. — Perennial. 



47. PANICUM. 



§ SwJo-enus Setaria. Flowers mostly spiked ; spikekts fiiniish- 

 ed with a bristly involucre. 

 Panicum glaucum. L. Glaucous Panic grass. 



Spike oblong; involucre of many bristles, rongh 

 forward ; corolla of the fruit transversely wrinkled. 

 Syn. Setaria glatjca. R. 4" S. 



PeNNISETUM GLAtrCXTM. Nutt. 



Culm round, striated, grooved at top. Leaves linear-lanceo- 

 late, flat, with striated sheaths and hairy stipules. Spike cylin- 

 drical, its pedicels mostly two flowered, with involucres often or 

 a dozen yellowish bristles which are rough upward. Corolla 

 inclosing the seed corrugated. — Cultivated and low grounds. — 

 July. — Annual. 

 Panicum VERTiciLLATUM. L. Whorled Panic grass. 



Spike whorled: spikelets in fours; involucres of 

 two bristles, rough backward, single flowered. 

 Syn. Setaria verticillata. R. Sf S. « 



PeNNISETUM VERTICILLATUM. Nutt. 



4# 



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