170 DICOTYLEDONOUS. 



1. C. Camphorata. (Sfern herbaceous, succulent, slightly'pubescent. Leaves 

 ovate-lanceolate, acute, denticulate. Flowers in axillary, terminal corymbs, 

 shorter than the leaves ; scales of the involucre acute, as long as the florets. 

 This plant, when bruised, gives out a strong, disagreeable odor. 



Purple. %. August— Sept. Salt marshes. Marsh Flea-bane. 



2. C. Marylandica. Sle?n erect, rather succulent. Leaves ovate-lanceo- 

 late, denticulate, pubescent. Floivcrs in corymbs, scales of the involucre li- 

 near or ovate. Seeds minute, pappus, short, consisting of 20-30 rays. 



Purple. 0. July — Aug. On the coast of CaroUna and Georgia. 



Genus XX. ARNICA. 



Involucre hemispherical ; leaflets equal, longer than the 

 disk, receptacle naked, pappus simple ; florets of the ray 

 often with 5 filaments, destitute of anthers. 



1. A. NuDicAULis. (S^cm simple, hirsute, somewhat viscid. Radicle leaves 

 opposite, sessile, somewhat viscid, decussate, dentate. Sie7n nearly leafless, 

 or with 1-2 pair of ovate, sessile leaves. Flowers in terminal racemes, on 

 small branches at the summit of the stem ; leaves of the involucre hirsute, in 

 a single series, ^tyle 2-clett. Seed obovate, striate, pappus pilose. 



Leopard' s-hane. 

 Yellow. %. April — May. Damp pine barrens, common. 1-2 feet. 



Genus XXI. CHRYSOPSIS. 



Involucre imbricate ; ray florets pistillate, those of the disk 

 perfect. Anthers naked at the base ; pappus double, the 

 outer chaffy and minute, the inner pilose and scabrous, many 

 raved. Seeds obovate, villous. Receptacle naked. 



1. C. Argentea. S^cm branching towards the sumttiit, silky. iecDes lan- 

 ceolate, long, linear, entire, somewhat rigid, covered with a silky pubescence. 

 Flowers in terminal corymbs. Involucre pubescent, imbricate ; leaflets subu- 

 late, acute ; ray florets 10-11, those of the disk numerous. Seeds oblong, vil- 

 lous or hispid ; pappus colored. 



Yellow. %. July — October. Dry soils. 



2. G. Graminifolia. Stem erect, silky, leafy towards the summit. Leaves 

 entire, lanceolate, linear, covered with a silky pubescence. Flowers in com- 

 pound corymbs. Stainens at first yellow, afterwards white. Seed oblong ; 

 pappus colored, but lighter than the preceding. 



Yellow. %. July — Oct. Sandy soils, common. 1--2 feet. 



3. C. PiNiFOLiA. Stem glabrous, rigid. Leaves numerous, crowded, linear, 

 rigid, those of the branches small, linear. Flowers in terminal corymbs; in- 

 volucre imbricate, with linear-lanceolate scales, woolly at the point. Anthers 

 white, conspicuous. Seeds long, hairy, hispid, exterior pappus subulate, 

 whitish, the interior scabrous, brown. 



Yellow. Sept.— Oct. Sand hills, middle Georgia. 18-20 in. 

 .' 4. C. Mariana. Stem erect, hairy, simple. Leaves oblong-lanceolate, ser- 

 rate, acute, the upper ones sessile, the lower ones spatulate, hairy on the un- 

 der surface. Flowers in a simple corymb ; involucre many leaved, viscidly 

 and glandular pubescent. Anthers 2-cleft at the base, with the apex white. 

 iSeea oblong villous ; pappus scarcely colored. 



Yellow. % August — Oct Dry sandy soils. 1-2 ft 

 d. C. Trichophylla. Stem hairy, ""erect. Leaves oblong, sessile, obtuse, 

 lower ones attenuate at the base, woolly. Flowers in simple corymbe ; invo- 



