232 



ZONES AND REGIONS 



[Pt. Ill, Sect. I 



different districts, frequently in such a way tliat one of the tree-forms 

 predominates over the others (see Figs. 116 and 121). Besides tree-palms. 

 lianes like Calamus and Desmoncus are rarely absent from the forest, as 

 well as short-stemmed species, like the species of Geonoma, or acaulous 

 forms. Palms also grow scattered over savannahs, for example species of 

 H)-phaene and Copernicia tectorum (Fig. 200). Real formations, pahn- 



FlG. \U). Oreodoxa regi.i. Young specimen in the tropical rain-forest of .Southern 

 Florida. From Garden and Forest. 



t- 



grovcs, appear chiefly on swampy or frequently inundated ground ; the} 

 are formed by Mauritia setigera in Trinidad, by other species of Mauritij 

 in the north of South America, by Phoenix sylvestris in Cisgangetii 

 India (Fig. 120), by Nipa fruticans in the Eastern Asiatic mangrove: 

 (Figs. 326 and 227). 



Next to the palms, the tree-like Gramineac, especially species of Bambus: 

 and Dendrocalamus (Fig. 113), belong to the most characteristic forms 



