CXXII. COMPOSITE. 



503 



Eupatorium. 

 Few-flowered head. 



Eupatorium. 

 Diagram. 



Eupatorium. 

 floret (mag.). 



Eupatorium. 

 floret cut vertically (mag.). 



Eirpatorivm. 

 floret. Pistil (mag.). 



[Tribes of Compositce, as re-classified for the ' Genera PI an tarum' : 



TKIBE I. VERNONIACE.E. Heads homogamous ; flowers all tubular. Anthers sagittate at 

 the base. Style-arms subulate, hirtellous. Leaves usually alternate. Corolla never yellow. 

 Pappus usually setose or paleaceous. Ethulia, Vemonia, Piptocarplia, Stilpnopappus, Lychno- 

 phora, Eremanthis, Wlipliantopus, &c. 



TEIBE II. EUPATORIACEJE. Heads homogamous ; flowers all tubular. Anthers nearly 

 entire at the base. Style-arms sub-terete, obtuse, shortly papillose. Leaves opposite or alter- 

 nate. Corolla rarely pale ochreous, never truly yellow. Pappus often setose. Adenostemma, 

 Ageratum, Stevia, Trichogonia, Eupatorium, Mikania, Brickellia, Liatris, &c. 



TRIBE III. ASTEROIDE^E. Heads heterogamous, rayed or discoid, or with the ray sup- 

 pressed and then homogamous. Anthers obtuse, almost quite entire at the base. Style-arms 

 compressed, appendiculate (except in BaccJiaridece). Leaves usually alternate. Receptacle 

 most often naked. Corollas of the disk usually yellow, of the ray the same, or blue or red or 

 purple. Solidago, Gutierrezia, Haplopappus, Pteronia, Lagenopliora, Brachycome, Bellis, Amelias, 

 Aster, Felicia, Olearia, Celmisia, Erigeron, Conyza, Psiadia, Baccharis, &c. 



TRIBE IV. INULOIDE^. Heads heterogamous, discoid or rayed, or with the ray suppressed, 

 and then homogamous. Anther-cells tailed or setose at the base. Style-arms linear, obtuse, 

 inappendiculate, or styles of $ flowers undivided. Leaves usually alternate. Corolla of the 

 disk usually yellow, of the ray of the same (rarely of a different) colour. Blumea, Pluchea, 

 Epaltes, Evax, Filago, Anaphalis, Gnaphalium, Helipterum, HelicJtrysum, Cassinia, Angianthus, 

 Stcebe, Metalasia, Relhania, Podolepis, Inula, Iphiona, PuUcaria, Buphthalmum, &c. 



TRIBE V. HELIANTHOIPE.E. Heads heterogamous, rayed, rarely discoid, or with the ray 

 suppressed, and then homogamous. Receptacle paleaceous or rarely naked in the disk. 

 Anther-cells not tailed, or mucronate only at the base. Style-arms truncate or appendiculate. 



