208 COMPOSITE. (COMPOSITE FAMILY.) 



22. INUL.A, L. ELECAMPANE. 



Outer scales of the involucre sometimes leaf-like. Achenia terete or 4-sided 

 Pappus simple, of capillary bristles. Anthers with 2 tails at their base. Oth- 

 erwise much as in the last genus. (The ancient Latin name.) 



1. I. HELENIUM, L. (COMMON ELECAMPANE.) Stout (3 -5 high); 

 leaves large, woolly beneath ; those from the thick root ovate, petioled, the 

 others partly clasping ; rays very many, narrow. 1J. Road-sides, escaped from 

 cultivation. Aug. Heads very large. Root mucilaginous. (Adv. from Eu.) 



23. PL, tJC HE A, Cass. MARSH FLEABANE. 



Heads many-flowered ; the flowers all tubular ; the central perfect, but sterile, 

 few, with a 5-cleft corolla ; all the others with a thread-shaped truncate corolla, 

 pistillate and fertile. Involucre imbricated. Anthers with tails. Achenia 

 grooved. Pappus capillary, in a single row. Herbs, somewhat glandular, 

 emitting a strong and disagreeable or camphoric odor, the heads in close com- 

 pound corymbs. Flowers purplish. (Dedicated to the Abbe Pluchc.) 



1. P. cainphorata, DC. (SALT-MARSH FLEABANE.) Minutely vis- 

 cid, pale (l-2 high) ; leaves scarcely petioled, oblong-ovate or lanceolate, thick- 

 ish, obscurely veiny, serrate ; corymb flat; involucre viscid-downy. - (Cony- 

 za camphorata, Biyel. C. Marylandica, Pursh.) Salt marshes, Massachusetts 

 to Virginia and southward. Aug. 



2. P. ftEtida, DC. Almost smooth (2 -4 high) ; leaves distinctly petioled, 

 veiny, oval-lanceolate, pointed at both ends, serrate ; corymbs panicled ; invo- 

 lucre smooth. 1J. River-banks, Ohio to Illinois, and southward. Aug. 



24. BACCHARIS, L. GROUNDSEL-TREE. 



Heads many-flowered ; the flowers all tubular, dioecious, vi/. the pistillate and 

 staminate flowers in separate heads borne by different plants. Involucre imbri- 

 cated. Corolla of the pistillate flowers very slender and thread-like; of tho 

 staminate, larger and 5-lobed. Anthers tailless. Achenia ribbed. Pappus of 

 slender capillary bristles, in the sterile plant scanty and tortuous ; in the fertile 

 plant very long and copious. Shrubs, commonly smooth and resinous or glu- 

 tinous. Flowers whitish or yellow. (The name of some shrub anciently dedi- 

 cated to /jircchus.) 



1. B. lialimifolia, L. (SEA GROUNDSEL-TREE.) Smooth and some- 

 what scurfy; branches angled; leaves obovatc and wedge-form, -coarsely 

 toothed, or the upper entire ; heads scattered or in leafy panicles ; scales of the 

 involucre acutish. Sea-beach, Connecticut to Virginia, and southward. Sept. - 

 Oct. Shrub 6 -12 high; the fertile plant conspicuous in autumn by its very 

 long and white, pappus. 



2. B. glomeriiliflora, Pers. Leaves gpatalate-oblqng; heads larger, 

 sessile in the axils or in clusters ; scales of the bell-shaped involucre broader 

 and very obtuse: otherwise like the last. Pine barrens, Virginia near the 

 Coast, and southward. 



