WHITE OR nrixH ci,()\i;r 



27 



when the pressurL- is removid, ;iiul tht^ pDllcii Is ilms ucl! covered, 

 or protected from rain or creeping;" insccis. flu- h()iu-\- lies at the base 

 of the ovary near the base of the united stainc-ns, bein^ reached by 

 apertures each side of the free stamen. The insect stands on the 

 two winj^s, thrusting its head beneath the standartl, which it forces 

 up, depressin;^ the \vin<;s and keel and forcini;- the stamens and pistil 

 as^ainst the bees abdomen, and possibly causing cross-pollination on 

 the return of liie parts 

 to their place it the insect 

 has previously visited an- 

 other riovver of the same 

 species. The stigma pro- 

 jects above the anthers, 

 first touching the abdomen 

 ot a visitor. Ihe calyx-tube 

 is short, allowing Andremi 

 and Halictiis to reach the 

 honey. The wings and keel 

 move together or rotate 

 when pressed, ami the 

 tornirr projecting beyond 

 the latter this causes a lever 

 motion. The elasticity of 

 the standard causes the 

 parts to return to their place 

 alter insects' visits, and the 

 other parts also. The 

 visitors are Hymenoptera 



bus pratoniiii, Mcgacliilc 



luilloiighbiclla, Halictus tarsatus, //. iimiiaculatus, A iidrcna fnlvicrus) ; 

 Diptera (Syrphidae, Volucella bombylans, Conopidee, Myopa buccata, M. 

 tcstacca); Lepidoptera (Large White Butterfly [Pieris brassiere)). 



The pods are covered by the corolla not falling in fruit, and these 

 when the head is ripe fall off just rotind the plant. The seed is thus 

 dispersed by the plant itself 



Like the Red Clover, White Clover re(|uires a sand soil, never 

 (or rarely) growing in humus soil as the former does. 



Urophlyclis tj-ifolii and Peronospora trifoliortnii are fungi parasitic 

 upon it. A beetle {Apion flavipcs) and a hymenopterous insect 

 {Collctcs marginata) live on it. 



r.^ 



