H)G 



PLANT STUDIES 



tluit of the Ijaiiyau tree, whose wide-spreading branches 

 are supported l)y proj) roots, which arc sometimes very 

 numerous (see Fig. 101). The immense banyans usually 



illustrated are 

 especially culti- 

 vated as sacred 

 trees, the i)rop 

 roots being as- 

 sisted in pene- 

 trating tlic soil. 

 There is record 

 of sucli a tree in 

 Ceylon with 350 

 large and 3,000 

 small prop roots, 

 al)le to cover a 

 village of 100 

 huts. 



(;0. Parasites, 

 — Besides roots 

 related to soil, 

 water, air, and 

 various mechani- 

 cal supports, 

 there arc others 

 related to hosts. 

 A host is a liv- 

 ing pla.nt or 

 an i ni a 1 n p o n 

 w h i c h s m e 

 other plant or 

 animal is living 

 as a parasite. 

 The parasite gets its su])})lics from the host, and must be 

 related to it projierly. If the parasite grows ujion the 

 surface of its host, it must penetrate the body to obtain 



Fig. 10'2. a dodder ])l;int ])ariisitic on .a wilktw twifj;. Tlie 

 leatluss dodder twines about the willow, and sends out 

 suclcing processes whicli i)enetrate and al)sorh, — Atter 



STRASBtlROER. 



