266 DICOTYLEDONOUS PLANTS. 



the longitudinal receptacle. Seeds numerous, imbricated, li- 

 near and winged. a< v -i Didynamia. Angiospermia. 



S. americana Linn. 



HAB. Pine barrens. N. J. to Car. Aug., Sept. U.Stem 

 12 18 inches iiigh,' simple, pubescent. Leaves alternate, lan- 

 ceolate, entire, somewhat 3-nerved. Flowers in a terminal ra- 

 ceme, alternate, subsessile, dark purple. 



10. CHELONE. Linn. 



Calyx 5-parted, with-S bracts. Carol ringent, ventricose. 

 Sterile filaments shorter than the rest ; anthers woolly. Cap- 

 sule 2-celled, 2-valved. Seeds membranaceously margined. 



Dldynamia. Angiospermia. 



C. glabra Linn. : smooth; leaves opposite, oblong, lanceolate, acu- 

 minate,, serrate ; flowers in dense spikes. 



HAB. Wet grounds. Can. to Car. Aug. Oct. If.. Stem 2 

 feet high, simple. Floiccrs large, white or reddish, in a com- 

 pact terminal spike. * . Snake-head. 



11. PENTSTEMON. Linn. 



Calyx 5-leaved. Corol bilabiate, ventricose. The fifth 

 sterile filament longer than the rest and bearded on the upper 

 side. Anthers smooth. Capsule ovate, 2-celled, 2-vnlved. 

 Seeds numerous, angular. Didynamia. Angiospermia. 



1. P. laxigatum Linn. : smooth ; leaves ovate-oblong, clasping at 

 base, slightly toothed, the lower ones entire ; flowers paniculate ; ste- 

 rile filament bearded near the top. Chelone pcntstemon Walt. 



HAB. Low grounds. Penn. to Car. June. H. Stem 1 2 feet 

 high. Flowers in terminal panicles. 



2. P. pubcscens Linn. : stem, pubescent ; leaves serrulate, lanceolate - 

 oblong, sessile, clasping ; flowers in panicles ; sterile filament beard- 

 ed from the top below the middle. 



HAB. Hill sides. Can. to Geor. W. to Miss. June. U- 

 Stem 18 inches high. Flowers pale purple, in terminal panicles. 



12. HERPESTIS. Gaert. 



Calyx 5-cleft, unequal, bibractate at base. Corol tubular, 

 sub-bilabiate. Stajnens included, all fertile. Capsule 2-cell- 

 ed, 2-valved ; dissepiment parallel to the valves. 



, ,.' Didynamia. Angiospermia. 



H. cuneifolia Pursh : very smooth. ; leaves cuneate-obovate, obscure- 

 ly crenate near the summit ; peduncles as long as the leaves ; corol 5- 

 cleft Monniera cuneifolia Mich. 



HAB. Inundated- banks. Penn. to Car. Aug. It' Stein pros* 



