£RUNDO, TRIANDRTA. DIGYNIA. 95 



JVectaries lanceolate. Stamens 3 ; anthers yellow. Stigmas 

 white. 

 Hab. In bog-meadows, particularly those in the vicinity of salt- 

 water. Common in the Hackensack and Newark meadows, 

 New-Jersey. In Pennsylvania and New-England. Mu h len- 

 der g: July — August. It sometimes bears er^or. 



Allied to A. Uttorea of S c hrader. The synonym of 

 Sfirengel (1. c.) I have no doubt is correct, as his descrip- 

 tion was taken from specimens which I sent him. The A. 

 atricta of Timm. differs from our plant in having the awn 

 dorsal and near the base. 



3. A. brevipilis*: panicle diffuse, capillary ; calyx un- 

 equal, shorter than the corolla, bearded at the base ; corolla 

 equal, awnless, hairy 5 pappus very short. A. Epigeios M u h L 

 Gram. p. 189.^ 

 Root perennial. Culm 3—4 feet high, terete. Leaves broad- 

 linear, and with the sheaths very smooth. Stifiule hairy. 

 Panicle pyramidal, lax ; branches single or in pairs. Calyx 

 with 5 opposite tufts of hair at the base, scabrous towards the 

 upper part, acute, 1 -nerved; inferior glume much shorter 

 than the other. Corolla with lanceolate, rather obtuse valves, 

 the inferior without any traces of an awn. Pajifius about a 

 third as long as the flowers. 

 Hab. In sandy swamps in the pine-barrens of New- Jersey, near 

 Quaker- Bridge. September, 



Allied to A. Efiigeios, but differs in its capillary panicle, 

 much shorter pappus, the absence of the dorsal awn, 8cc. 



14. PSAMMA. P.deBcauv. 



Calyx 2-valved, awnless. Corolla 2-valved, shorter 

 than the calyx, surrounded with hairs at the base. Nee 

 taries linear- lanceolate, longer than the seed. Style 

 3-parted; stigmas 3. P, de Beau v. t. VI. f. 1. 

 Boem. ^ Schu It. Gen. 3S7. Arundo L. Trin. 

 Ammophila Host. Calamagrostis Roth. Pha- 

 LARis Nutt. Flowers in a dense spiked panicle. 



P. arenaria P. de B.: panicle spiked ; calyx acute ; co- 

 rolla three times as long as the pappus ; leaves involute. 

 R e m. ^' Schult. \l. p. 845. Arunuo arenana Lin, 

 Wi t Id. Spec. \. p. 457. S mith Fl.Brd I. p. 148. Ens;, 

 Bot. t. 520. Mich. Fl. 1. p. 73. Pursh Fi. 1. p. 87. 

 Muhl. Gram. p. 88. 



Root perennial, extensively creeping. Culm 2 — 3 feet high, 

 erect, rigid. Leaves very long, smooth and glaucous, 4 — S 

 lines wide, finely attenuated and pungent. Sheaths smooth. 

 Sti/iule oblong, obtuse. Panicle dense and cylindrical, white, 



