172 COMPOSITiE. • Erigeron. 



18. E, querci folium {Liam.) : pubescent; stem loosely corymbose above; 

 radical leaves obovate-oblong, mostly lyrate-pinnatifid or deeply sinuate- 

 toothed ; the caullne scattered, oblong-lanceolate, partly clasping, sharply 

 toothed, or the uppermost entire ; heads small and numerous ; rays innu- 

 merable, almost capillary, twice the length of the involucre, pale purple ; 

 achenia minutely hairy. — Lain. ill. t. 681, f. 4 ; Poir. did. 7. p. 491 ; 

 Pursh! fl. 2. p. 533; not of DC. E. Philadelphicum? Ell.! sic. 2. p. 

 396; DC! prodr. 5. p. 285; not of Linn., Willd.! <^r. E. Philadelphi- 

 cum, Reichenb. ic. exot. t. 134 ? 



Fields &c., Florida {Lamarck, Nuttall !) to Georgia ! S. Carolina ! and 

 west to Louisiana! and Mississippi ! March-June. — Stem 1-2 feet high, fur- 

 rowed. Heads rather smaller than in E. Philadelphicum ; the involucre, 

 and the (often very pale) rays resembling that species. Pappus simple. — 

 This is without doubt the E. quercifolium of Lamarck; and is probably 

 distinct from the preceding, to which some states nearly approach. The 

 form with sparingly toothed leaves is the E. Philadelphicum a. of De Can- 

 dolle ; and that with lobed leaves is his var. quercinum. 



§ 3. Rays in a double or single series, much longer than the involucre : 

 pappus double {both in the disk and ray) ; the exterior short, more or less 

 distinct, setaceous or squamellate-suhulate : achenia 2-b-nerved : perennial. 

 — Stenactis, Cass, Nees, {excl. spec.) (Heterochasta, DC. ? Erigeron § 

 Phsenactis, &c., Nutt.) 



* Exterior pappus somewhat indistiTict, of short seta:, more or less intermixed with the 

 inner : rays in a double series. 



19. E. glaucum (Ker) : stems several from a persistent caudex or rhizoma, 

 ascending, more or less villous with soft slightly viscid hairs, simple or 

 sparingly branched, terminated by large solitary heads ; leaves spatulate- 

 oblong, obtuse, sessile, the upper often hairy ; the lowest spatulate-obovate, 

 somewhat 3-nerved, tapering into a margined petiole : rays very numerous 

 (about 100), twice the length of the pubescent or villous involucre; achenia 

 sparsely hairy, 4-nerved. — Ker, bot. reg. t. 10 ; DC. prodr. 5. p. 284. 

 (Aster Bonariensis, Spreng. syst. 3. p. 528.) Stenactis glauca, Nees, Ast. 

 p. 275. Aster Californicus, Less, in Linntea, 6. p. 121 ; Hook. <^* Am.! 

 hot. Beechey, p. 146; JVees, Ast. p. 53 ; DC. prodr. b. p. 228. 



/?. plant more villous throughout. — E. maritimum, Nutt. ! in trans. Amer. 

 phil. soc. (n. ser.) 7. j)- 310. Woodvillea calendulacea, DC. prodr. 5. 

 p. 318? 



Coast of California and Oregon, Menzies ! Caj^t. Beechey! Douglas? 

 Nuttall! {i3.) — Stem or caudex decumbent, sending up mostly simple 

 branches in the wild state, 3-12 inches high, terminated by solitarj^ heads 

 as large as the Marigold (1 to nearly 2 inches in diameter including the pale 

 red rays), more or less pubescent or villous, as well as the involucre, with 

 soft spreading hairs, which are somewhat viscid towards the summit of the 

 stem. Leaves rather succulent; the margins of the upper ones often villous- 

 ciliate, and the surfaces of the uppermost also villous in var. (3. — The more 

 hairy variety of tliis plant (the rays of which appear yellowish in dried 

 specimens) is without much doubt the Woodvillea calendulacea of De 

 CandoUe: no other plant of Douglas's collection accords with the descrip- 

 tion. We have also adopted the suggestion of Hooker & Arnott (Bot. 

 Beechey, suppl. p. 351), as to the identity of the Aster Californicus, Less, 

 (a less villous form of the same species), with Erigeron glaucum, Ker, of 

 unknown origin, supposed to come from South America ; but which these 

 authors, apparently with good reason, suspect to have been raised from seeds 



