394 ^-'^- I'KVOIMIVTA. 



and others which occur include: — 



Dldymodon afcr. Psciidolcskca clavirantCit. 



lintosthodon Bcr<jiaiius. Griminia licklonn. 



Weisia. s])s. Pabrouia f'ilifera. 



Hymoiiostoinum, sps. Stercodon ciiprcssifonnis. 



Physcoiiiitriiim, sps- Cainpylof^iis iiaiio-tcna.w 



J ortiila iiiuralis. Piccia. several si)s. 



Portiila l^iUfcra. Pla</i<>chasiiia. 



Pissidciis, several small sjis. Finihriaria. 



Bryiim. several S])s. J'ossoiiihroiiia. 



J^tychoiiiitritiiii crispafnm. Ccplialozia. 

 Piychoinitriitm ciinillatifoliiim. Lophocolca. 



Forests are absent. Sphagnum is absent, few pleurocarpous 

 mosses are present, few foliose Hepaticre are present, trees are 

 scarce, and consecjuentK- e])iphytes are few, and the usual habi- 

 tats of the Bryo])hyta in this region are either where moisture 

 and shade are obtainal)le under cover of rocks, or oai the banks 

 rising from water-pools. The conditions prevailing are not 

 favourable, consecpientK tlie few s])ecies ])resent are ]H'culiar 

 and interesting. 



V- Northern Rkoion. — This region includes the I'.aslern 

 and Northern Transvaal, the ]\)rtuguese I'last African Trovince, 

 .Swaziland and Soutli Rhodesia, almost all tropical, and all 

 draining intc) the Indian ( )cean north of Natal. 



Coastward it is composed of xerophilous leguminous open 

 forest, very poor in Bryophyta : westward it includes the high 

 dry prairies of Rhodesia, poor in f'ryophyla. except in the few 

 wooded valleys, but between the coast belt and the prairies 

 there extend the mountain ranges separating the Transvaal and 

 [■Rhodesia from Portuguese East Africa, forest-clad on their 

 eastern s1o];l-s. which are still unexplored for Bryophyla; but 

 as the\- are known to contain many ferns, they may be assumed 

 to contain man_\' mosses and liverworts also. 



From Bar'berton and Pretoria m^rthward. including the 

 Woodbush. -jtecies occur which ha\e not been found further 

 south, but which have relations northward. .\mong these are: 



Lct^iodontium. I'liiiaria, several StcrcoplixUum. 



Rhachithcc'ium. species. several si)ecits. 



Tracliyfliylluin. U'cbcra. -everal Prxthrodout'uitu. 



Lcvicrclla. s])ecies. Rania. 



l.iudbcriiia. lirfodinui. several Rigodiiini. 



I'xirhubt. several species. Ifrrbrrta. 



si)ecies. 



Among the most common mosses in the forests, as also ;n 

 the open country, are those common in the Eastern region ; one 

 of the marked features, however, is that Rhacopilum. which, in 

 the Eastern region is usually a .sub-epiphytal tforest species, and 

 <^ften fertile, is here present in many open streams as wide mals 

 on stones frequently submerged, and is seldom fertile. 



