238 On the Grasses. [May, 



somewhat acute, purple; leaves narrow, acute, smooth, rigid; 

 stipules membranaceous. — Linn., sp. 110; Ell., sk. 1, p. 164; 

 Derby, Bot. Gal, 1, p. 525; P. cristata Trait, p. 80; Jide Ell. 

 Megastachya rigida, P. de Beauv. 



Dry sandy soils in the vicinity of Beaufort, South Carolina, 

 [Elliot.) A European species, which we believe has not been 

 introduced into the Northern States. 



PoA Reptans, Michx. 



Culm branched, creeping, nodose, rooted at the joints; spike- 

 lets oblong, or linear lanceolate, fifteen to twenty flowered; flowers 

 accuminate, panicle contracted or sparingly spreading; leaves 

 numerous, attenuate and accuminate, one to two inches long; 

 glumes acute, very unequal, carinate, keel green, margins white, 

 scarious, palea unequal, accuminate; lower palea three nerved, 

 upper palea ovate, hairy on the keels; root annual — Poa hypnoi- 

 das Lamark.; Lam. ill., 1, p. 185; vide Pursh Eragrostis reptans 

 JVees., " in Mart. jl. Bres. 1, p. 514," ex Torrey. 



Sandy soils; frequent especially on the banks of rivers in nearly 

 every section of the United States. Sometimes the creeping 

 culms extend two feet, sending forth roots at the joints. A small, 

 handsome, delicate grass, of little use to the agriculturist. 



PoA PiLosA. — Pilose Meadow Grass. 



Culm caspitose, oblique, geniculate, hairy in the axils; panicle 

 capillary, branches alternate, or opposite; spikelets linear, five to 

 thirteen flowered, flowers ovate, accuminate, not webbed at the 

 base, of a dark lead or purple color; glumes unequal, ovate, ac- 

 cuminate, membranaceous; lower one smaller; lower palea ovate, 

 scabrous or slightly pectinate on the keel; upper palea persistent 

 on the rachis; caryopsis oblong, brown; leaves linear lanceolate, 

 five nerved, pilose at the base, ligule bearded; culm six to four- 

 teen inches high, branching at the base; root annual. — Linn., sp. 

 1, p. 68; P. pectinacea Michx., Jl. 1, p. 69; Pursh., Jl. 1, p. 81; 

 P. tenella Pursh., I. c, Eragrostis pilosa Beauv. Jigros., p. 71. 

 Flowers July, August. 



New York and Western States, to South Carolina and Louis- 

 iana. 



PoA HiRSUTA, Michx. — Hirsute Meadow Grass. 



Panicle very large, much branched, spreading, branches divar- 

 cate, hairy in the axils; spikelets oblong, five to fifteen flowered; 

 culm stout, rigid, erect, one to two feet high; leaves lanceolate, 

 long, hairy near the base, sheaths longer than the joints, the lower 

 ones hairy, ligule bearded; spikelets purple, lance oblong; root 

 annual. — P. spectabilis Pursh., Jl. 1, p. 80. 



