12 Tansley and Fritsch. 
strong tap-root, as in many seaside and xerophilous plants all over 
the world. Of these Evolvulus alsinoides, Polygala glaucoides, 
Tribulus terrestris and the rather rare Crotalaria nana (Fig. 7) may 
be mentioned. None are exclusively maritime plants. Species of 
Phyllanthus commonly constitute a part of the sand-flora and 
resemble the plants just mentioned in habit, having a very long 
tap-root. 
Fig. 7. Crotalaria nana (Papilionaceae) shewing a typical habit of the inner 
zone plants. 
Several leguminous plants, some shrubby, are common, e.g. 
Canavalia obtusifolia, with thick trifoliate leaves and bright pink 
flowers, a conspicuous feature in some places, even replacing Ipomcea 
biloba, and confined to the seashore, Crotalaria retusa var. maritima , 
and Tephrosia purpurea , Vigna luteola and species of Cassia, C. Tora, 
occidentalis and auriculata. All of these, except the first two and 
