GRASSES. 357 
ALABAMA: Mountain region. Rich damp swales. Clay County, bottom of Tal- 
ladega Creek, 
Distinguished from Panicum agrostoides by the longer acuminate spikelets and 
distinctly pedicellate flowering glume.! 
Type locality: ‘‘ In ditches and near ponds: New Jersey to Virginia.” 
Herb. Geol. Surv. Herb. Mohr. : 
Panicum elongatum ramosior var. nov. 
Stem stouter and taller than in the type, fully 3 feet long, reclining, smooth leaves, 
2 feet and over in length, sheaths shorter than the internodes; panicle large, widely 
spreading, pyramidal, 12 to 18 inehes long; lower branches 4 to 5 inches long; 
secondary branches rather distant, mostly in pairs; spikelets as in the type, pale. 
By these permanent characters a well marked variety. 
Louisianian area. Mississippi. 
ALABAMA: Damp cultivated ground. Mobile County, Pierce’s Landing. July, 
October; abundant; perennial. 
Economie uses: Valuable; furnishes a large portion of the spontaneous hay crop 
of the bottom lands. 
Herb. Geol. Surv. Herb. Mohr. 
Panicum agrostoides Muhl. Gram, 119. 1817. 
Gray, Man. ed. 6, 391, Chapm. Fl. ed. 3,583. Scribner, Grass, Tenn. 2: 41, t. 9f. 33, 
Alleghanian to Louisianian area. Maine and eastern Massachusetts to Nebraska, 
south to Kentucky and Florida, thence to castern Texas and Arkansas. 
ALABAMA: Mountain region to Coast plain. Grassy swales and low pine barrens. 
Clay County, near Idaho mine. Mobile County, pine barrens west of the city. July, 
Angust; frequent. 
Type locality: ‘‘Hab. in pratis humidis, floret Julio, Augusto. Pennsylvania, 
Georgia, Carolina, Cherokee,” 
Herb. Geol. Surv, Herb. Mohr. 
Panicum virgatum L. Sp. Pl.1:59. 1753, Switcn PANIC-GRASS, 
Ell. 8k.1:120. Gray, Man. ed. 2,631. Chap. F1.575. Coulter, Contr. Nat. Herb. 2: 
508. Scribner, Grass. Tenn. 2:42, t. 9, f. 35, 
Alleghenian to Louisianian area, Ontario, Saskatchewan, New England, west to 
Minnesota, Nebraska, and Colorado, south to Florida and Texas. 
ALABAMA: From the Tennessee valley to the coast. Light damp soil. Calhoun 
County (#. A. Smith). Mobile and Baldwin counties. Most abundant on sandy 
borders of tide-water swamps. 
A variety of low growth, with short contracted panicle, was observed years ago on 
arid pine ridges about Grandbay. The specimens collected at the time have been 
lost, and the plant has not been observed since. There is little doubt that it was 
identical with P?. virgatum breriramosum Nash, lately described. 
Type locality: ‘Hab. in Virginia.” 
Herb. Geol. Surv. Herb. Mohr. 
Panicum amarum El1l.Sk.1:121. 1817. SEASIDE PANIC-GRASS. 
Gray. Man. ed. 6,631. Chap. FL 574. Vasey, Contr. Nat. Herb. 3:35. 
Carolinian to Louisianian area. Southern New England, along the seashore to 
Florida. 
ALABAMA: Littoral belt. Sandy beach. Mobile County, Cedar Point (only 
locality). Very rare; July; perennial. — ; 
Type locality: ‘Among the sand hills on the seashore [South Carolina and 
Georgia].” 
Herb. Geol. Surv. Herb. Mohr. 
Panicum crus-galli L. Sp. Pl.1:56. 1753. 3ARNYARD GRASS, COCKSPUR GRASS. 
Ell. Sk. 1:114. Gray, Man. ed. 6, 633. Chap. Fl. 577. Coulter, Contr. Nat. Herb. 
2: 502. 
Temperate and warmer regions, widely spread over the globe. 
ALABAMA: Throughout the State. Low wet ground, cultivated places, border of 
marshes; annual. 
Type locality: ‘‘ Hab. in Europae et Virginiae cultis.” 
Varies greatly with the spikelets awnless or with awns of greater or less length. 
Panicum walteri Pursh, F].1:66. 1814. 
Panicum hirtellum Walt. Fl. Car. 72. 1788. Not All. 1775. 
P, hispidum Muhl. Gram. 107. 1817. 
Carolinian and Louisianian areas. Florida to Louisiana. 
' Nash, Bull. Torr, Club, Vol. 24, p. 347. 
