390 Eupatorieae 



KEY TO THE TRIBES. 



- all alike, composed of both ray- anil disk-flowers orof disk-flowers only. 

 I tiers not caudate at base. 

 Receptacle naked. 



Hi acts of the involucre well-imbricated. 



Style-branches stigmatic only below the middle; flowers never 



yellow; rays none. l. Eopatobieae 



Style-branches of the perfect flowers stigmatic to or above the 

 midclk-, the upper sterile portion forming a flattened ap- 

 pendage. '.'. AsTEKKAE 



Style-branches stigmatic up to the truncate apex. 



Bracts herbaceous; herbage not aromatic. T. Hki.knieae. 

 Bracts with soarlous margins; herbage aromatic or strong- 

 scented. 8. ANTHEMIDEAB. 



Bracts usually in 1 series: pappus generally capillary. 



'J. Sl'.NF.CIOXKAE. 



Receptacle fimbrillate. 7. Hei.enieak. 



Receptacle chaffy. 



Bracts of the involucre not scarious. 



Bracts of the involucre in a single series, more or less enclosing 



tin' ray achenes. 6. Madieae. 



Bracts of the involucre in 2 or more series not enfolding the ray- 

 aohenes. 5. Helianthb w. 



Bracts of the involucre scarious, at least on the margins. 



8. ANTHEMIDEAE. 



Anthers caudate at base. 



Anthers not appendaged at apex: involucre usually scarious. 



3. INULEAE. 

 Anthers appendaged at apex; bracts usually spinescent. 



Corollas regular, all tubular. 10, iynareae. 



Corollas Slipped: rays wanting. 11. Mi'tisieae. 



Heads of 2 kinds: staminate heads clustered above the pistillate, anthers 

 more or less free ; pistillate heads few-flowered, flowers completely 

 enclosed in tin- prickly involucre. -1. AUBROS1EAB. 



II- ads all alike, composed of ligulate flowers only. 12. ClCBOBIEAE. 



Tribe 1. EUPATORIEAE. Eupatoey Tribe. 



Ours herbs or suffrutesceni plants with white or flesh- 

 colored perfect disk-flowers and no rays. Receptacle 

 naked. Anthers not caudate at base. Style-branches 

 si igmatic only below the middle. 



Achene L'EUPATOBIUM. 



s H>-ribbed. 2. Coj.eosanthus. 



1. EUPATORIUM L. 



Erecl mostly branching perennial herbs, with opposite 

 verticillate or alternate often punctate leaves, and 

 cymose-paniculate discoid heads of white blue or purple 



