BY MARJORIE I. COLLIXS. 



381 



their coating of glistening salt crystals wiiich are secreted by special complex 

 glands (Solereder, l'J08, 510). During the day, this fine layer of salt is swept 

 away by on-shore breezes. 



Text-fig 5. Pneumatophores of Aviceintia officinalis showing 

 relationship to the general root system. 



The root system of Aegiceras does not extend for such great distances from 

 the plant as does that of Avicetinia. The roots possess no special pneumato- 

 phores but occasionally run for a short distance over the surface of the mud, or 

 rarely, are raised into knee-like projections (Text-fig. 6). In this Aegiceras 

 more closely resembles certain tropical mangroves, e.g. Bruguiera (Schimper, 



Text-iig. 6. Part of root system of Aegiceras viajiis showing knee like projections 

 above mud level. 



1903, p. 401). A special air-storing tissue is developed in the roots, connecting 

 with large pneumathodes. 



Of the viviparous seedlings of Aegiceras, Schimper says (1903, p. 400) 

 "The seedlings of Aegiceras are curved like horns, and are smaller than tho.se oV 

 the Bhizophoraceae; they remain enclosed in the thin pericarp of the fruit." 

 {See Fl. xxviii., Photo 6 of this paper). 



