f^7 

 J'tQaninjs- .qX floral envQlopfta . 

 V/iijr is a calyx ? 



1. Protection of hnd. 



2. Protosyntliesis. Usefixl for raamifacturing materials for 

 local needs. 



3. Protection of seeds. 



Potentilla Canadensis, an exaxaple of all three. Kooders found in 

 many tropical flower's, hydnthodes in the calyx. 



Wliy is a corolla ? 

 Darwin, Cuhheck, Miller, and others believed the corolla was for the 

 attraction of insects. Plateau published experiments in which he 

 proved that insects were color blind, hence the petals do not attract 

 insects at all. V/ar waged, at present time between the two factionR, 

 though Plateau's theory seems to be not ver^'' tenable but the question 

 still remains -'Open. 



Seeds and Fruits . 

 Nearly every wing of seed is green at first, hence Prof. Lloyd 

 thinks that it loes the work of protosynthesis. 



ProtoQtion. 



A. Mrinc Growth Period. 



B. During Rest Period. 



C. During Period. 



For .-rrowth hairs which are usually stiff, rigid, and dead. 

 Position of hairs often explained conditions. Direction of growth 

 in hairs.. Wliy are hairs so u,su.ally stiff ? A vertical hair is 



