312 COMPOSITE. [Helianthus, 



31- HELIANTHUS. Z. 



Achenium compressum, coiiforme, paleis magis minusve deciduis, binis pluribiisve minori- 

 bus coronatum. — Herbae scepe altissimce^ rarius Frutices, Americce iudigeni, foliis oppositis 

 vel alternis, integris asperis; capitulis luteis, soUtariis et tenninalibiis vel corymbosis ; 

 mvolucx'is polyphylUs^ imbricatls ; rachide /?/«/^a. Less, 



* Foliis plerisque oppositis. 



1. H, atro-rnhens ; aspcrus, caule superne nudiusculo, foliis ovato-oblongis subspathulatis 

 crenatis triplincrvibus scabris, involucri foliolis ovatis acutis imbricatis albo-ciliatis brevibus, 

 disco atro-purpureo.— ij««. Sp. PL p. 1279. Mich. Am. v. 2. p. 140. Pursh, FL Am. v, 

 2. p. 570. GawL in Bat. Reg. t. 508. Sims^ Bat Mag. t 2668.— H. difFusus? Sims, Bot. 

 Mag. t. 2020. 



Hab. Banks of the Saskatchawau, as far as Edmonton House. Drummond.—-T]Ah fine species is readily 

 distinguished by its leaves tapering at the base so as to be almost spathulate; clothed, as is the stem, vnth 

 short whit^rigid hairs, and by the short leaflets of the involucre, which are ovate, acute, scarcely acuminated, 

 imbricated, and ciliated with white hairs. 



2. H. divaricatus; caule glabro ramosissimo, foliis suboppositis sessilibus lanceolato- 

 ovatis trinervibus scabris, paniciila trichotoma gracili parviflora, involucri foliolis lanceolato- 

 acuminatis laxis ciliatis. — Linn. Sp. Pi. p. 1279. Mich. Am. v. 2. p. 141. Pursh, Fl. Am. 

 V. 2. p. 570. 



Hab. Canada. Pursh, Norway House, on the Saskatchawan. Dr. Richardson. Drummond. 



3. H. frondosus; caule inferne glabro, foliis ovatis argute serratis, pedunculis scabris, 

 involucri foliolis squarrosis undulatis frondosis ciliatis, radiis 8-floris. PL~~Linn. AmcBJt. 

 Acad. V. 4. p. 290. Pursh, Fl. Am. v. 2. p. 570. 



Hab. Canada. Pursh. Lady Dalhousie.~Uy specimens from Lady Balhousie agree with those of Dr. 

 Darlington, of West Chester, United States ; yet it appears to be a species not well understood, and my 

 Canadian specimens are not very perfect. Pursh says it resembles H. decapetalus and H. multiflorus in 

 several respects, but is distinct. The American Botanists would render an Important service to science, 

 if they would clear up, by an examination of recent specimens, the numerous doubts that exist respecting 

 various of the species composing this genus. 



4. H. trachelifolim ; foliis ovato-lanceolatis acuminatis serratis triplinervibu utrinque 

 scaberrimls, squamis calycinis lineari-Ianceolatis exterioribus longioribus. Ph.~~Wllld. Sp. 

 PL p. 2241. Pursh, Fl. Am. v. 2. p. 570. Elliott, CaroL v. 2. p. 424.— H. Gigas. Midi 

 Am. V. 2. p. 141. (according to Pursh.) 



Hab. Canada. Pursh. Mrs, PemW.-What I consider to be this plant, (for I possess no authentic 

 specimen), has the leaves very much like those of Campanula Tracheiium, and strongly serrated, and the 

 flower of a pale sulphur colour. 



* * Foliis super ioribus alternis. 



5. H. giganteus; ramosus, scaber, foliis alternis longe lanceolatis utrinque attenuatis 

 scabris obsolete triplinerviis sessilibus subserratis, pedunculis lateralibus terminalibusque, 

 involucri foliolis lanceolato-subulatis laxis cano-pubescentibus basi prcecipue ciliatis.— iznw. 

 Sp. PL p. 2242. Pursh, FL Am. v. 2. p. 571. Elliott, CaroL v. 2. p. 426. 



Hab. Saskatchawan and Red Rivers. Drummond. Douglas. 



