COMPOSIT.E. 



2.S1J 



Key to the Trihos In Cnllfornlii. 



I. TU151J I.I FLORAE ; the corolliis tubular ami 5- (rarely 4-) tootlicil 

 or cleft in the peifect ilowers ; those with ligulate corollas (iiiys) 

 at the margin either pistillate or neutral. 

 Style-branches club-shaped, obtuse, neither hairy nor appendaged : (losv- 



ers all perfect, never yellow. 

 Style-branches of jjorfect flowers flat and tii)pcd with a distinct flat ap- 

 pendage : anthers without tails : leaves all alternate. 

 Style-branches of the perfect flowers neither truncate nor tipped with any 

 appendage : anthers with tails : heads heterogaraous : recep- 

 tacle not long-bristly : corollas not deisply cleft. 

 Style-branche.^ of perfect flowers truncate-capitate or tipped with an ap- 

 pendage : anthers without tails : leaves or some of them often 

 opposite. 

 Receptacle chaffy, at least next the margin : involucre not scarious : 



pappus not capillary. 

 Receptacle not chaffy : involucre not of imbricated scarious scales : 



pappus not capillary. 

 Receptacle not chaffy or rarely so : involucre of imbricated partly scari- 

 ous scales : pappus a short c.romi or none. 

 Recpptado not chaffy : jjappus capillary and copious. 

 Style-branches without tips or apiiendnge, more or loss concreted to or 

 near the ape.t : corollas all tubular and very deeply (sometimes 

 irregularly) f)-cleft into long linear lobes : receptacle densely 

 bristly : anthers sagittate or with tails. 

 It. LABI ATIFLOR^ ; the corollas bilabiate and the flowers perfect. 

 III. LIGULIFLOR/E ; the corollas all ligulate (and 5-toothed at the 

 apex), and the flowere perfect. Juice milky. 



2. EUPATORIACKit. 



3. A.STKKOII)KyE. 



4. iNULOIDEiE. 



5. Helianthoide.«, 



6. Helenioide*. 



7. Anthemide*. 



8. Senecionide-b. 



9. Cynaroipe^. 



10. MUTISIACEiE. 



11. ClCHORIACE.£. 



Key to the Genera. 



Trihe I. VERNONIACEiE. Heads hon)ogamous and the flowers all perfect, with tubular 

 corolla, never yellow. Anthers sagittatt; at baSe. Branches of the style slender-subulate, 

 minutely hispid. , . . , . , 



No plant of this tiibe, as thus defined, is known in California or in the regions nortli 

 of it. The only genus to be expected is E/cph/tiUopus, of which one or two species 

 are widely spread over the warmer parts of the world, and these may come in at the south. 



Tkibe 11. EUPATORIACEiE. Heads homogamous and the flowers all perfect, with regular 

 tubular corolla, never yellow, or more than cream-rolor. Anthers nearly entire at ba.se. 

 Bmnchos of the stylo obtuse, ofttnior thickened ui)wards or club-slmpod, minutely papilloBe- 

 granular or smoothish, the stigniatic lines inconspicuous. 



♦ Papjuis of 2 to 12 stout bristles or awns, alternating with as many scales. 



1. HofmeiBteria. InvohnTe and flowers as in BricMlia. Akcnos 4 - f)-aiigled or riblnsd. 



♦ * Pappus of numerous capillary bristles. 



+■ Receptacle naked. 



2 Eupatorium. Akenes 5-angled. liristles of the pappus scabrous, rather rigid. 



3. Briokellia. Akenes lO-ribbed or striate. Bristles of the pappus about in one senes, scabrous 



or almost plumose, rather rigid. Involucre imbricated, 

 t. Adenostylea. Akenes lO-ribbed. Brisflns of the pappus very copious, hardly scabrous, 

 soft, white. Involucre not imbricated. 



+-+- Receptacle chafTy, at least among the outer flowers. 

 5. Carphephorus § Kuhnioides. Akenes 10-ribbed. Pappus plumose. Involucre imbricated. 

 Tuire 111. ASTEROlDEiE. Heads cither heterogamous or homojiamous, the disk-flowers 

 with regular tubular corolla, the ray-flowers when present liRulate and pistillate only, 

 rarely neutral. Receptacle naked (not chaffy) except sometimes in No. 20. Antlien* 

 nearly entire at base (without tjiils). Branches of the style in perfect flowers flattened, 

 tipped with an appendage. Leaves mostly alternate. 

 Subtribe I. ASTERINE/E. Heads homogamous and the flowers perfect or heteroganious 

 and mostly radiate, yet several are discoid, or with merely filiform corollas to the pistil- 

 late flowers, but none diuecious. 



