1 4 COMPOSITE. [Seriocarpus. 



54. EURYBIA.* Crt55. 



■t 



Radius fieinineus fertilis. Involucri foliola arete imbricata disco herbaceo apicis angusto. 

 FloscuH disci tubo limboque discretis. Achenia elongata prismatica glabra vel pubescentia. 

 Pappus simplex rigidulus persistans scaber. Receptaculum alveolatum. — Characteres plu- 

 rimi Asteris generis^ sed differt; involucro subcylindrico arete imbricato^ folioUs apice 7ion 

 foliaceis vel saltern Iceviori costm expansione proediiis^ acheniisque linearibus longioribus sub- 

 prismaticis vel angulatis^ nee compressis; habitu denique et pubescentia, Nees. 



1. E. macrophylla ; foliis cordatis ovatisve, radicalibus subtrinervatis, caulinis in petio- 

 lum alatum contractis serratis scabris subtus hirtis, caule hirto ramisve glabro patulo corym- 

 boso, ramulis rigidisj involucri arete imbrieati foliolis oblongo-lanceolatis obtusis. Nees, 

 Cass, in Diet, des Sc, Nat, v. 37./?. 487. Nees^ Ast, p. 140. — Aster inaerophyllus. Linn. 

 Pursh^ FL Am, v, 2,p, 552. — A. divaricatus. Linn, — A. infirmus. Mich, Am, v, 2. p, 109? 

 ( Nees, ) 



Hab. Canada. Pursk, From Lake Huron, I>r, Todd, to Norway House on the Saskatchawan, 

 Drummond. 



r 



2. E. corymbosa; foliis ovatis inferioribus cordatis serratis petiolatis, caule dichotomo- 

 corymboso, involucri foliolis imbricatis obtusis exterioribus ovatis. Nees, — Cass, L c- 

 Nees, AsLp, 143. — Aster corymbosus. Ait, Hort, Kew, ed, I, v, 3. p. 207. Pursh^ El, Am. 

 V, 2, p, 552. Elliott^ Carols v, 2,p, 365. 



Hab. Canada. Pursh. — Nees has three other American species not in any American Flora, with which 

 both Dr. Boott and myself are unacquainted. 



55. SERIOCARPUS. Nees. 



Radius Jieminens fertilis. Lnvolucri Jbltolahasi lata subcartilaginea arete imbricata, apice 

 abrupte herbacea et plerumque patula. FloscuH disci pauci conieo-cylindracei, tubo lim- 

 boque confluentibus, Achenia brevia, obverse pyramidalia dense serieea. Pappus simplex 

 rigidulus persistens, Receptaculum angustum, alveolatum, irregulare. — Differt hocce genus 

 ab Eurybio appendice foliolorum involucri distihcta; ab Astere acheniis brevibus dense sericeis 

 et forma flosculorum disci^ ab utroque genere cunctisque reliquis Astereis habitu^ prcesertim ab 

 injlorescentia pendente, Nees. 



1. S, solidagineus ; foliis lineari-spathulatis obtusis integerrimis margine scabris, corymbo 

 paucifloro. involucro squarroso. Nees^ Ast, p, 149. — Aster solidaginoides. Mich, Am, v, 2, 

 p, 108. Pursh^ FL Am, v. 2,p, 542. Elliott, Carol, v, 2, p. 340. — Conyza linifolia. Linn, 



Hab. Near Montreal. Mr, Cleghom. 



9. S, rigidus {LindL); foliis obovatis (potius oblongo-spathulatis) subtrinerviis integeni- 

 mis cauleque scaberrimis, corymbo terminali simplici vel composito contracto, involucri tur- 

 binati foliolis adpressis basi nudis, radio pappo brevlore. Lindl, MSS, 



• I follow the learned Nees von Esenbeck in the adoption of this and other Genera of his AsterinefE^ but I must con- 

 fess that I think the character is much too slight, and the difference in habit by no means sufficient to warrant such a 

 separation. 



