182 COMPOSITE. DiPLOPAPPUs. 



variety. The involucre, at first more or less turbinate, becomes somewhat 

 hemispherical when old. 



2. D. ericoides : strigosely canescent ; stems branching from near the 

 sufFrutescent ? base; leaves acerose-subulate, imbricated, mucronate-pilife- 

 rous ; scales of tlie involucre lanceolate-linear, acute, 1-nerved, with scarious 

 margins, loosely imbricated in about 3 series ; exterior pappus very minute ; 

 young achenia pubescent. — Inula? ericoides, Torr.! in ami. lye. New York, 

 2. p. 212. Chrysopsis ericoides, Eaton, man. hot. Bucephalus ericoides, 

 Nutt. in trans. Amer. phil. sac. {n. ser.) 7. p. 299. 



On the Canadian River ? Dr. James! (collected in Long's expedition to 

 the Rocky Mountains.) — Plant apparently 6-8 inches high, clothed quite to 

 the summit of the branches with appressed strigose and hispidly-ciliate heath- 

 like leaves ; those near the base 2 or more lines long ; those of the branches 

 scarcely a line long, thickened, concavo-convex, obscurely 1-nerved. Heads 

 solitary, rather small. Scales of the involucre rather few. Rays 10-15, 

 longer than the disk, apparently not yellow ; the disk-flowers about 12. Appen- 

 dages of the style oblong, much shorter than the stigmatic portion. Pappus 

 of rather few capillary bristles ; the exterior of about as many in proportion 

 to the inner as in D. linariifolius. 



3. D. alpinus (Nutt.) : stems several from the suffrutescent base, simple, 

 tomentose-pubescent, naked at the summit; leaves crowded, erect, linear- 

 oblong, mucronulate, rather rigid, scabrous, villous-pubescent when young, 

 1-nerved, flat, with cartilaginous minutely serrulate-scabrous margins ; 

 scales of the hemispherical involucre linear, acute, 1-nerved, with scarious 

 margins, pubescent, imbricated in about 3 series ; exterior pappus of rather 

 numerous setaceous bristles ; young achenia compressed, silky-villous. — 

 Nutt. ! in trans. Amer. phil. sac. {n. ser.) 7. p. 304. Chrysopsis alpina, 

 Nutt. ! in jour. acad. Philad. 7. p. 34, t. 3, /. 2. 



Rocky Mountains, near the Flat Head River, Mr. Wyeth! June. — Plant 

 3-4 inches high. Leaves about 4 lines long and one in breadth. Heads as 

 large as in D. linariifolius ; the rays " pale violet-purple," 12-15, elongated. 

 Appendages of the style subulate-linear, as long as the stigmatic portion. 



§ 2. Bristles of the inner pappus unequal, some of them (the innermost) cla- 

 vellate or slightly thickened at the summit ; the exterior of copious short 

 slightly squamellate bristles : achenia [pubescent or glabrous) obovoid, 

 more or less compressed, o-8-nerred : involucre shorter than the disk: leaves 

 scattered, membranaceous, veiny, entire: heads in compound corymbs: 

 corolla of the disk deeply 5-toothed : rays 8-12, white, or somewhat ochro- 

 leucous. — Triplopappus. (Species of Doellingeria, Nees. Diplostephium 

 § 1. Eudiplostephium, DC.) 



* The longer bristles of the inner pappus vnth manifestly clavellate tips: appendages of 

 the style liTiear-suhdate, elongated. 



4. D. cornifolius (Darlingt.) : stem slender, terete, pubescent-scabrous 

 above, sparingly corymbose-paniculate at the summit; leaves elliptical, or 

 broadly lanceolate, conspicuously acuminate at each end, ciliate, hairy on 

 the veins beneath ; heads few, scarcely corymbose, on divaricate pedicels ; 

 achenia glabrous. — Darlingt.! fl. Cest. p. 475. Dcellingeria cornifolia, 

 Nees, Ast. p. 181. Diplostephium cornifolium, DC. ! prodr. 5. p. 273. Aster 

 Americanus latifolius albus, &c. Pluk. ! aim. p. 56, t. 79, /.I. A. caule 

 infirmo, foliis ovatis, &c. Gronov. ! Virg. ed. \. jo. 99. A. divaricatus, 

 Linn. ! spec. 2. p. 873 (ex syn. Pluk. S^' Gronov. supr. cit.) ; not of herb. 

 Linn. ; Spreng. syst. 3. p. 529 ? A. cornifolius, Muhl. in Willd. spec 3. 



