COMPOSITE. (COMPOSITE FAMILY.) 



Pappus in the form of an auricle or crown. 

 Akenes with a broad pellucid wing on either 



side Anacyclus 

 Akenes pyramidal-angled or compressed-tetra- 

 gonal Anthemis 

 Pappus composed of both bristles and pales - Postia 

 Pappus 0. 



Heads not more than . 005 broad 



Heads always more than .005 broad, usually 



much broader 



Achillaea 

 Anthemis 



409 



30 



83 

 25 



31 

 33 



Senecio 



Bellis 



Calendula 



Tripteris 



43 



§ 3. Heads radiate. 



Receptacle naked, or chaffy near margin only. 

 Pappus composed of bristles. 



In more than one row, uniform - - - 

 In one row, uniform. 



Anthers entire at base - - - - 

 Anthers sagittate at base - - . 



Of the rays in oo rows, of the disk in 1 

 Outer of pales, inner of plumose bristles 

 Outer of crown-like, toothed bristles, inner 



delicate 

 Outer of crown -like toothed bristles, inner 



thickened 

 Pappus crown-like or 0. 

 Akenes obovate-compressed _ . . 



Akenes of the rays triquetrous, of the disk 



turbinate Chrysanthemum 36 

 Akenes curved, ring-like or inflated - - 

 Akenes 3-winged, 3-angled, tipped with a 



wing. 

 Receptacle chaffy. 

 Pappus crown-like. 



Akenes uniform, turbinate, not winged 

 Akenes of rays triquetrous, 2-winged 

 Pappus 0. 



Akenes tubercled, truncate at tip, hairy 

 Akenes tapering at base, broad at tip 

 Akenes obovate, rounded at tip, 3-ribbed at 



face. 

 Receptacle hirsute. Pappus hairy or 0. - 

 Receptacle bristly. Pappus of pales or bristles. 

 Pappus composed only of pales - - - 

 Pappus composed of bristles and pales. 

 Tip of akene marked by 3 grooves 

 Tip of akene marked by 1 groove 

 55 



44 



46 



