4. Inuloide^. 



5. HELIANTHOIDEiE. 

 3. HELENIOIDEiB. 



ANTHEMlDE.fi. 



Senecionide-e. 



COMPOSITiE. 280 



Key to the Tribes in California. 



I TUBULIFLOR^ ; the corollas tubular and 5- (rarely 4-) toothed 

 or cleft in the perfect flowers ; those with ligulate corollas (rays) 

 at the margin either pistillate or neutral. 

 Stvle-branches club-shaped, obtuse, neither hairy nor appendaged : How- 



^ ers aU perfect/never yellow. 2. Eupatouiace.e. 



Stvle-branches of perfect flowers flat and tipped with a distinct flat ap- 



pendac's : anthers without tails : leaves all alternate. 3. Asteuoide^. 



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

 appendage : anthers with tails : heads heterogamous : recep- 

 tacle not°long-bristly : corollas not deeply cleft. 

 Style-branches of perfect flowers truncate-capitate or tipped with an ap- 

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

 opposite. . , ^ . 



Receptacle chaffy, at least next the margin : mvolucre not scanous : 



pappus not capillary. 

 Receptacle not chaff'y : involucre not of imbricated scanous scales : 



pappus not capillary. _ 



Receptacle not chatty or rarely so : involucre of imbricated partly scan- 

 ous scales : pappus a short crown or none. 

 Receptacle not chaify : pappus capillary and copious. 

 Stvle-branches without tips or appendage, more or less concreted to or 

 near the apex : corollas all tubular and very deeply (sometimes 

 irre^ularlv) 5-cleft into long linear lobes : receptacle densely 

 bristly : anthers sagittate or with tails. 9. Cynaroide^. 



II. LABI ATIFLOR^ ; the corollas bilabiate and the flowers perfect. 10. MuTisiACEiE. 



Ill LIGULIFLORJ; ; the corollas all ligulate (and 5-toothed at the 



apex), and the flowers perfect. Juice milky. H- Cichoriace^. 



Key to the Genera. 



Tribe I VERNONIACEJE. Heads homogamous and the flowers all perfect, with tubular 

 corolla, never yellow. Anthers sagittate at base. Branches of the style slender-subulate, 



™ No pLnrof this tribe, as thus defined, is known in California or in the regions north 

 of it The only genus to be expected is EleplMntopios, of which one or two species 

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



Tribe II EUPATORIACEiE. Heads homogamous and the flowers all perfect, with regular 

 tubular corolla, never yellow, or more than cream-color. Anthers nearly entire at base. 

 Branches of the style obtuse, oftener thickened upwards or club-shaped, minutely papUiose- 

 granular or smoothish, the stigmatic lines inconspicuous. 



* Pappus of 2 to 12 stout bristles or awns, alternating with as many scales. 

 1. Hofmeisteria. Involucre and flowers as in 5ric^c?Zia. Akenes 4-5-angled or ribbed. 



* * Pappus of numerous capillary bristles. 

 HH Receptacle naked. 

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

 s! Brickellia. Akenes 10-ribbed or striate. Bristles of the pappus about in one series, scabrous 

 or almost plumose, rather rigid. Involucre imbricated. 



4. Adenostyles. Akenes 10-ribbed. Bristles of the pappus very copious, hardly scabrous, 



soft, white. Involucre not imbricated. 



-i-4- Receptacle chaffy, at least among the outer flowers. 



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

 Tribe III. ASTEROIDE.E. Heads either heterogamous or homogamous, the disk-flowers 



with regular tubular corolla, the ray-flowers when present ligulate and If filiate only. 

 rarely neutral. Receptacle naked (not chaffy) except sometimes in No. 20. An ner^ 

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

 tipped with an appendage. Leaves mostly alternate. 

 Subtribe I. ASTERINEiE. Heads homogamous and the ^P^^i-s Perfect or heterogan^^^^^^ 

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

 late flowers, but none dioecious. 



