180 ••• COMPOSITE. Erigeron. 



bly be applied to the peduncles, instead of the involucre. There is already 

 an Erigeron hispidum of DeCandolle (in Wiit^ht, contrib. hot. Ind., !s^' DC. 

 prodr.) ; but we have left the name of Mr. Nuttall's species unchanged ; 

 firstly, because that of De Candolle will perhaps be removed from the genus; 

 and secondly, we see no adequate distinction between this plant and E. 

 speciosum. 



39. E. occidentale (Nutt.) : hispid with a short pubescence ; corymb com- 

 pound, irregular; lower leaves oblong-lanceolate, obtuse, subserrulate ; upper 

 linear, entire, scales of the involucre lanceolate, acute, scarcely hirsute; rays 

 very numerous, red ; inner pappus of about 12 bristles ; the outer very dis- 

 tinct. Nutt. in trans. Amer. phil. soc. (n. ser.) p. 311. 



"Oregon. — A low perennial species, with broadish leaves on the lower 

 part of the stem. Allied to E. strigosum, but scarcely the same, with red 

 flowers and broad leaves." Nuttall. 



40. jE. foliosum (Nutt.) : rather hirsute and somewhat scabrous ; stem 

 simple, erect, terete, attenuated, the summit corymbose ; leaves oblong- 

 linear, sessile, acute, crowded; scales of the involucre lanceolate, pubescent, 

 acute, in about 2 series, nearly equal; rays short, red, about 30; achenia 

 somewhat hirsute. Nutt. in trans. Amer. j^hil. soc. {n. scr.) 7. p. 309. 



St. Barl)ara, California, Nutiall. May. — "Avery remarkable species; 

 the stem terete, full of leaves, one and a half to two inches long, and about 

 2 lines wide, diminishing in size with the attenuation of the stem. Pappus 

 double ; the outer small, the inner of many brownish rays. Stigma exserted, 

 smootli and nearly equally filiform in the ray; obliquely truncate and slightly 

 pubescent in the discal florets. Rays narrow, about the length of the invo- 

 lucrum [that is exserted to about that length], of a full purple red. This 

 species appears to be considerably allied to Corethrogyne, but has the 

 achenium of Erigeron, somewhat prismatic, with 3 or 4 longitudinal brown 

 lines or nerves, but the obtuse stigma appears to be an anomaly in the genus." 

 ISutt. — We have not seen this plant, which, in addition, is said to resemble 

 an Aster in aspect, and to liave been described from immature specimens. 

 The ai)pendages of the style (stigmas) are, we believe, always obtuse in 

 Erigeron. 



E. Carolhiiamim, of Linnceiis, is wholly founded on the Virga-aurea Carolinianf , 

 &c. DM. Elth. t. 306, /. 394, a yellow-flowered plant, which no botanist has suc- 

 ceeded in identifying. It has nothing in common with the Phalacroloma obtusifo- 

 lium of Cassini (which is Erigeron stiigosum), nor with the Erlgf ron hyssopifolium, 

 Michx. (which is Aster graminifolius). This confusion commenced with Fursh, 

 who erroneously adduced the figure of Dillenius and the E. Carolinianum as syno- 

 nyms of the E. hyssopifolium of Michaux. 



E. longifolium (Desf &; Pers.) is pretty clearly not of this genus, and in all pro- 

 bability not a North American plant. Pursh adds the mark v. s., but we find no 

 specimen in Mr. Lambert's herbarium. In the list of excluded species, De Candolle 

 refers it to Jasonia longifolia, but we find no such species described, nor have we 

 elsewhere met with the name. 



E. retroflczum (Poir.), a veiy imperfectly characterized species, is said to have 

 extremely narrow linear glabrous leaves, and a short, imbricated, and very glabrous 

 involucre. Perliaps it is Chiysopsis pinifolia, Ell. 



28. DIPLOPAPPUS. Cass, in hull, philom. 1817, c^ in diet. 13. p. 308. 



Diplostephium, Kunth. — Diplopappus &; Diplostepluum. Cass. {did. 37.) & DC. 

 (excl. Diplop. § 1 1 &; 2.) — Diplostephium &c Dcellingeria, in part, Nees. — Chrysopsis 

 § 2, Nutt. pardy. 



Heads many-flowered; the ray-flowers 8-12, or rarely more numerous, 

 in a single series ; those of the disk tubular, perfect. Scales of the involucre 



