1 04 Compositae 



separate, or sterile, actinomorphic or zygomorphic. 

 Calyx rarely distinctly developed, usually represented 

 by hairs, bristles or scales forming the pappus. Corolla 

 tubular, ligulate, or 2-lipped (in Tribe Mutisieae, not 

 represented in Britain). Stamens inserted on the corolla- 

 tube, filaments usually free. Anthers usually united, 

 forming a tube, dehiscing inwards. Carpels (2), median, 

 but the ovary is i-locular with one ascending, anatropous 

 ovule. Style bifid in the fertile flowers, the two arms 

 stigmatic on their inner surfaces. Fruit a i -seeded, 

 inferior nut. Seeds without endosperm. 



Subfamily i. Ticbuliflorae. No latex present. 

 Corolla of disc-flowers never ligulate. 



Tribe i. Eupatorieae. Leaves usually opposite. 

 Flowers all hermaphrodite and alike. Corolla tubular, 

 never pure yellow. Anthers basifixed, obtuse at base. 

 Style-arms hairy outside, but the style has no ring of 

 hair below the bifurcation. 



Only British genus : Eupatorium. 



Tribe 2. Astereae. Leaves spiral. Heads mostly 

 with % ligulate ray-flowers and ^ tubular disc-flowers. 

 Anthers as in Eupatorieae. Style without ring of hairs 

 below bifurcation, arms thickly hairy above. 



Ray-flowers i -seriate, yellow: disc-flowers yellow. 

 Pappus scabrid. Solidago. 



Ray-flowers I -seriate, white or pink: disc-flowers 

 yellow. Pappus absent. Bellis. 



Ray-flowers i -seriate, white, blue or purple: disc- 

 flowers yellow. Pappus many-seriate, persistent. Aster. 



As Aster, but ray-flowers 2 or more seriate. 



Erigeron. 



