Compositae 105 



Tribe 3. Innleae. Leaves spiral. Ray-floivers mostly 

 $ : disc-flowers often 4-merous. Anthers with tails at 

 the base. Pappics mostly of hairs. 



1. Corolla of $ (ray) flowers filiform. Chaffy floral- 

 bracts present. Filago. 



2. As I but floral-bracts absent. 

 Heads dioecious. 



Antennaria (including *Anaphalis). 

 Heads with </ and % flowers. Gnaphalium. 



3. Corolla of % (ray) flowers ligulate. Floral-bracts 

 absent. 



Pappus of scabrid hairs. Inula. 



Pappus of an inner row of scabrid hairs and an outer 



row of scales. Pulicaria. 



Tribe 4. Heliantheae. Leaves usually opposite. 

 Involucral-bracts without broad scarious margin. Disc- 

 flowers actinomorphic. Floral-bracts present. Atithers 

 basifixed with obtuse base. Style with hairs mostly 

 above bifurcation. Pappus never of hairs. 



Subtribe i. Ambrosiinae. Corolla of % flowers 

 reduced or absent. Anthers sometimes quite free. 



Xanthium. 



Subtribe 2. Coreopsidinae. All flowers with perfect 

 corollas. Corolla of ray-flowers early deciduous. Pappus 

 absent or of bristles. Bidens. 



Subtribe 3. Galinsoginae. As above, but pappus of 

 ciliate scales. *Galinsoga. 



Tribe 5. Anthemideae. As Heliatithcae but often 

 aromatic, leaves spiral, and involucral-bracts with broad 

 scarious margins. Pappus minute or absent. 



