Pluchea. COMPOSIT.E. 261 



Louisiana! July.-Sept. — U Stem 2-3 feet high. Leaves 2-3 inches 

 long, rather acute. Flowers dull purple. 



2. p. fcetida (DC.) : stem minutely pubescent ; leaves (large) oval-lance- 

 olate, very acute or acuminate at each end, distinctly petioled, membrana- 

 ceous, almost glabrous, conspicuously feather-veined, serrate ; corymbs com- 

 pound, paniculate ; scales of the involucre glabrous, doited with minute 

 glands. — DC..' prodr. 5. p. 452. (excl. syn. Pursh S^' Cass.?) P. petiolata, 

 Cass, in did. sci. nat. 42. jp. 2? Baccharis fcetida, Linn. spec. 2. p. 861, at 

 least as to syn. Dill. Eltli. t. 89, /. 105. Conyza camphorata, Pursh, fl. 2. 

 p. 523; Nutt. gen. 2. p. 145, not of Ell.? nor Erigeron camplioratum, Linn. 

 Gynema dentata & viscida, Eaf. ! ann. nat. p. 159 Sf in herb. DC. 



Along streams, &c. Pennsvlvania ? to Alabama ! and throughout the 

 Western States! Aug.-Oct. — 11 Stem strongly grooved or angled, 2-4 feet 

 high : the plant exhaling a more powerful odor than the following species. 

 Leaves 5-8 inches long, and 1-3 broad, pubescent beneath, especiall}' on the 

 veins, and copiously sprinkled with minute resinous globules, very veiny. 

 Heads numerous : the involucre at first ratiier longer than the disk. — We 

 are somewhat uncertain as to the plant of Clayton on which the Baccharis 

 fcetida of LinnjEus was ])artly founded ; but the figure of Dillenius here cited 

 doubtless was intended for this species. The Erigeron camphoratum, Linn, 

 hort. Ups. (^r. is pretty clearly the following. We therefore retain the sy- 

 nonymy of De Candolle, but leduce two of his species to one. 



3. P. camphorata (DC.) : minutely viscid-pubescent and glandular; leaves 

 lanceolate-ovate or oblong-ovate, serrile or slightly petioled, pale and mi- 

 nutely pubescent and sprinkled with resinous globules both sides, slightly 

 feather-veined, repandly serrate ; corymbs fastigiate; scales of the involucre 

 pubescent and viscid, ciliale. — P. camphorata & P. Marilandica, DC.! I. c. 

 P. Marilandica, Cass. I. c? Erigeron camphoratum, Linn. spec. 2. p. 864; 

 Willd.! spec. 3. p. 1960. Conyza Marilandica, [Dill. Elth. t. 88, f. 104 ?) 

 Michx.! fl. 2. p. 126; Pursh!' I. c. ; Nutt. I. c. ; Ell. sk. 2. p. 320. C 

 camphorata, {Ell. I. c. ?) Bigel. fl. Bost. ed. 2. p. 299, not of Pursh, Sfc. 

 Baccharis foptida, Walt.? Stylimnus maritimus, Raf.! in herh. DC. 



/?. angusti folia: leaves lanceolate, obscurely serrulate or entire. — Conyza 

 angustifolia, Nutt.! in jour. acad. Philad. 7. p. 109. 



Salt marshes, Massachusetts! to Florida! and Louisiana ! Aug.-Oct. — 

 (D Stem 10-30 inches high. Leaves slightly succulent, 2-3 inches long. 

 Heads fewer and larger than in the preceding ; the purplish involucre at 

 length shorter than the disk. Flowers light purple. 



4. P. purpurascens (DC): herbaceous, somewhat viscidly puberulent ; 

 leaves ovate-lanceolate, rather acute, unequally serrate, tapering into a peti- 

 ole, minutely jiuberulent and glandular, somewhat veiny; heads subglobose, 

 pedicellate, in loose corymbs; scales of the involucre pubescent-tomentose 

 and viscid ; the exterior ovate, the inner oval-lanceolate, somewhat spread- 

 ing. DC. prodr. 5. jy. 452. — Conyza purpurascens, Swartz, 2^'>'odr. Ind. 

 Occ. p. 112? 



Key West, Mr. Blodgett! — Apparently a rather small annual herb; with 

 much the habit and appearance of C. camphorata, the leaves about the same 

 size, but narrower; the cauline ones tapering into distinct petioles. As we 

 have seen specimens of the same species from St. Domingo, we have little 

 doubt that it is De CandoUe's P. purpurascens, and most probably his P. 

 glabrata also. 



Conyza Carnlinienais of Jacquin is referred by De Candolle to Pluchea (Conyza, 

 Linn.) odorata, a shrubby West Indian and Mexican, but certainly not a Carolinian 

 species. 



