THE dicotylp:dones 



1945 



enclosed in the involucre and often crowned by the persistent calyx. The 

 embryo is straight and lies in a scanty endosperm. 



The commonest genus is Scahiosa (Fig. 1874), several species of which 

 are cultivated in gardens. Three British species were originally included in 



Fig. 1874. — Scabiosa caucasica. Capitulate 

 inflorescence with greatly enlarged 

 marginal flowers. 



this genus but one is now placed in Knautia. Cephalaria tatarica (Fig. 

 187s) is yellow in colour and is often cultivated, but most of the flowers m 

 the family are blue or red in colour. The genus Dipmcus mcludes D. 



p„ iSy^.— Cephalaria tatarica. Two capitula showing en- 



■ larged exterior flowers. Right, flowers in male stage with 



stamens exserted. Left, flowers with exserted styles. 



