168 DICOTYLEDONOUS, 



gins revolute denticulate. Flowers in terminal corymbs ; involucrum, with 

 lanceolate ciliate scales, with a subulate point. Seeds striate, hairy 

 Purple. %. June — August. Pine barrens. 2-3 feet. 



3. V. Angustifolia. Stem simple, erect, scabrous. Leaves long-linear, 

 numerous, entire or slightly denticulate, margins revolute, pubescent beneath , 

 Flowers in terminal corymbs ; involucre w^ith ovate, lanceolate scales, termi- 

 nated by a subulate point. Seeds striate hairy. 



Purple. %. June — August. Common. 3-4 feet. 



4. V. NovEBORACENSis. Stem erect, pubescent, branching towards the 

 summit. Leaves numerous, narrow, lanceolate, long, upper surface glabrous, 

 the lower pubescent. PZot^ers in large fastigiate corymbs ; involucre hemis- 

 pherical, with ovate lanceolate scales, termmated by a long subulate point. 

 Seeds striate, somewhat hairy, exterior pappus subulate. 



Purple. '2|.. July — September. Moist rich lands. 5-10 feet. 



5. V. ToMENTOSA. Stem erect, slender, tomentose towards the summit. — 

 Leaves narrow-lanceolate, long, acutely serrate, upper surface scabrous, low- 

 er tomentose. Flowers in fastigiate corymbs, involucre with ovate lanceolate 

 scales, with a long filiform point, hairy. 



Purple. '21-. July — August. Wet soils. 3-6 feet. 



6. V. Prjealta. Stem erect, angled, branching towards the summit, pu- 

 bescent. Leaves numerous, lanceolate serrate, somewhat scabrous, pubescent 

 beneath. Flowers in fastigiate corymbs ; involucre with ovate, acute scales, 

 unarmed. 



Purple. %. August. Upperdistrictof Carolina and Georgia. 4- 8 ft. 



7. V. Altissima. Stem erect, glabrous. Leaves lanceolate, serrate, 

 slightly scabrous. Flowers in small, terminal corymbs; involucre small, with 

 ovate, ciliate, appressed scales, slightly mucronate. Seeds striate. 



Purple. %, Aug.— Oct. Georgia, damp places, 6-10 feet. 



Genus XV. BACCHARIS. 



Involucre imbricate, cylindric ; scales sub-coriaceous, ovale, 

 Receptacle naked ; florets tubular, monoecious, with sterile 

 and fertile intermixed. Staminate jiorets with exserted an- 

 thers, unawned at the base, pappus slightly plumose. Fertile 

 jiorets with capillary pappus. 



1. B. Angustifolia. A shrub. Stem erect, glabrous, branching, young 

 branches angled, dotted. Leaves sessile, entire, linear, obscurely 3-nervea. 

 Flowers in compound panicles, generally axillary, solitary. Involucre slightly 

 ventricose, with glabrous, ovate, lanceolate leaflets; sterile florets tubular, 

 white, with a short, undivided style ; fertile florets 5-cleft. Stamens wanting. 

 Style 2-cleft. Seeds striate, cylindric. 



White. T7. Sept.— Oct. On the coast. 1-10 feet. 



2. B. Halimifolia. A shrub, with erect branches, glabrous, young branch- 

 es angled. Leaves sessile, obovate, cuneate, dentate towards the summit, up- 

 per ones usually entire, covered with whitish scales or dust. Flowers in leafy 

 compound panicles, axillary and terminal. Style of the fertile florets 2-cleft, 

 rather shorter than the stamens. Seeds striate, oblong. 



White. T2. Sept.— Oct. Low country. 6-12 feet. 



3 B. Sessiliflora. A shrub with angular, erect, virgate branches, gla- 

 brous. Leaves nearly sessile, obovate cuneate, dentate towards the summit. 

 Flowers sessile, axillary, scattered, involucre, with obtuse scales reddish at 

 the summit. 



White. ^2. September — October. On the sea cost. 3-5 feet. 



