14] VEGETATIONAL TYPES OF TROPICAL LANDS 455 



Fic. 157. — A typical Manyroxc plant, Rhizaphoni iniuieltiyid, forniinu a char- 

 acteristic marginal ' mangrove ' and showing prominent prop-roots below. 



F'iG. 158. — Interior of Philippine mangrove-swamp forest at low tide, showing, 



below, the aerating prop-roots and the conical erect aerating roots which project 



upwards from the mud. 



