GRASSES. 357 



Alab.ama: Mountain re^^ion. Ricli damp swales. Clay County, bottom of Tal- 

 ladega Creek. 



Distinguished from Punicum (Kjvostoklei^ by the longer acuminate spikelets and 

 distinctly pedicellate tiowering glume.' 



Type locality : " In ditches and near ponds : New Jersey to Virginia." 



Herb. Geol. Surv. Herb. Mohr. 



Panicum elongatum raniosior var. no v. 



Stem stouter and taller than in the type, fully 3 feet long, reclining, smooth leaves, 

 2 feet and over in length, sheatiis shorter than the intcruodes; panicle large, widely 

 spreading, pyramidal, 12 to 18 inches 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. 



Louisianiau area. Mis8issii>pi. 



Al.\bama: Damp cultivated ground. Mobile County, Pierce's Landing. July, 

 October; abundant; ])ereunial. 



Economic uses: X'aluable; furnishes a large portion of the sjjontaneous hay crop 

 of the bottom lands. 



Herb. Geoi. 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. 9 f. 33. 



Alleghanian to Louisianian area. Maine and eastern Massachusetts to Nebraska, 

 south to Kentucky and Florida, thence to eastern 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, 

 August; frecpient. 



Type locality: " Hab. in pratis humidis, floret Julio, Augusto. Pfunsylvauia, 

 Georgia, Carolina, Cherokee." 



Herb. Geol. Surv. Herb. Mohr. 



Panicum virgatum L. Sp. PI. 1 : 59. 1753. Switch Panic-grass. 



Ell. Sk. 1 : 120. Gray, Man. ed. 2, 631. Chap. Fl. 573. Coulter, Contr. Nat. Herb. 2 : 

 508. Scribner, Grass. Tenn. 2 : 42, t. 9, /. 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 {E. 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 Graudbay. 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 Avith P. vir<iutum breriramosum Nash, lately described. 



Type locality : "Hab. in Virginia." 



Herb. Geol. Surv. Herb. Mohr. 



Panicum amarum Ell. 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. 



Alab.\ma : Littoral belt. Sandy beach. ilobile 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. PI. 1 : 56. 1753. Barnyard Grass, Cockspi-r 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 greartr or less length. 



Panicum walteri Pursh, Fl. 1 : 66. 1814. 



Panicum hirtellKm WaU.FL Car. 12. 1788. Not All. 1775. 



P. hispidnm Muhl. Gram. 107. 1817. 



Carolinian and Louisianian areas. Florida to Louisiana. 



Nash, Bull. Torr. Club, Vol. 24, p. 347. 



