122 BRITISH PLANTS 
hygrophytic. It has a special mode of seed-dispersal, 
for the seeds have to be lifted and deposited in places 
far above the ground-level. They are exceedingly small — 
and light, as in orchids, or they are enclosed in fleshy 
and sticky fruits, which birds carry and drop among the 
branches of the trees. 
Climbing plants and epiphytes which use other plants 
for support are said to form guilds with them. Without 
their aid climbers would fail to develop. Epiphytes, on 
the other hand, can and do grow in soil, if there is no 
vegetation around to obscure the light. 
