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» DIDYNAMIA GYMNOSPERmIa. 85 



ceolate, toothed near 

 the summit. 



longo lanceolatis, sii- 

 perne deiiticulatis. 



Pursh2. p. 411. 



Prasium incarnatum. Walt. p. l65. 



Stem about 3 feet high, square, glabrous, with the angles cartilaginous. 

 Leaves long, lanceolate, very acute, obtusely serrulate or denticulate par- 

 ticularly towards tiie summit, semiamplexicaule, but the lower ones much 

 attenuated above the base, all glabrous. Bracteas and Calyx pubescent. 

 Corolla ringent, bright purple, pubescent, 4 times as long as the ca- 

 lyx, inflated, the border 4 cleft, the upper segment large, rounded, the 

 3 inferior oblong, emarginate, the intermediate one streaked and spotted. 

 Filaments hairy, shorter than the corolla". Anthers two lobed, adiiering 

 only at the summit, toothed at base, dark purple with a white fissure, 

 St</le hairy. Stig?nas two, acute. A gland longer than the germs is at- 

 tached to their base, slightly angled, tapering, obtuse. Seeds ovate, an 

 gled on the inner side. 



Grows in iiiarshy soils, on the margins of rivers. 

 Flowers May — June. ^ 



3. Denticulatum. 



D. spicis eioiigatis^ 

 remotifloris ; bracteis 

 parvulis, lato-subula- 

 tis ; calycis dentibus teeth of the calyx 



Spikes long with 

 flowers distant; brac- 

 teas small^ subulate ; 



subaequalibus; foliis o- 

 vato?-laiiceolatis, den- 



nearly equal; leaves 

 ovate lanceolate^ 



ticulatis. I slightly toothed. 



Sp. pi. 3. p. 150. Parsh 2. p- 411- 

 Prasium purpureum. Walt. p. 166. 



Smaller than D, Virginicum- (Pursh.) Stem square, glabrous and 

 very minutely pubescent at the siunmit. Lcaies closely sitting, oblonff 

 and generally ovate lanceolate, rather acutely serrulate than denticulate, 

 glabrous, Bracteas about half as long as the calyx, and with the calyx 

 minutely pubescent. Corolla moderately large, handsome, variegated on 

 the lower lip, longer than the stamens. 



My specimens appear to differ in their leaves at least from the orljrmal 

 description of the D. denticulatum of Aiton, hut they agree minutely with 

 the figure in Curtis's Botanical Maga7,ine, Vol. 6. tab. 214. 



Grows in the mountains. Carolina to Pennsylvania. 



Flowers July— September. 



