332 BRYOPHYTA OF S. RHODESIA. 



adjoining Natal and Zululand floras. The subsoil varies; the rock 

 at Magude is all lava, while farther up, at Hellet's Concession, 

 where Dr. Sim collected, it is limestone, and this variation no doubt 

 accounts for the disproportionally large number of species com- 

 pared with the number of gatherings made. 



DlCRANACEAE. 



Trematodon aequicollis Ren. and Card. — Antioka (Junod, 

 322), Chicumbane (Junod, 333). 



These agree exactly with the description and figures of T. 

 aequicollis, as given by Roth, differing from T. divaricatus B. and 

 S. in the narrower nerve and denticulate subula of the leaves; from 

 the other peristomate African species in the peristome teeth mostly 

 split through their whole length, not united above. 



General distribution : Belgian Congo. 



Campylopus clavatus (R. Br.) Jaeg. — Magude (Junod, 334) 

 St. 



General distribution: Australasia, St. Paul Island, Cape Pro- 

 vince, Transvaal. 



FlSSIDEXTACEAE. 



Fissidens erosu'lus (CM.) Par. — Magude (Sim, 8995). 

 General distribution : Niam-Niam, Uganda, Southern 

 Rhodesia. 



Fissidens rotundatus sp. nov. Dixon. 



Crispidium. E gracillimis generis; caules 2 mm. ad 3 mm. 

 tantum longi, pulcherrime frondosi, plurijugi, complanati, oblongi, 

 obtusi, pervirides; foliis siccis fortiter faloato-decurvatis, caespitea 

 parvos densos instruentes. Folia conferta, patentia, percomplanata, 

 0.5 mm. longa, breviter oblonga, supeme nullo modo angustata, 

 rotundato-obtusa vel obtusissime apiculata ; marginibus ubique 

 minute sed distinote crenulatis; lamina vaginalis paullo ultra 

 medium folii producta, apud costam terminata, ibidemque rotun- 

 data, nee acuta ; lamina dorsalis ad folii basin attingens, ibiclemoue 

 abrupte desinens. Costa tenuis, ubique, praecipue supeme, pellu- 

 cida, perlongt sub apice dissoluta. Cellulae superiores obscurae, 

 opacae, minutae, 4ju, ad 7/x latae, minute densissime papillosae, 

 parietibus tenuibus pellucidis. 



Habitat: Shirindjen (Junod, 329a). 



A very pretty and quite distinct little species, with gracefully 

 frondose stems, short oblong leaves generally very widely rotundate 

 above and very obtuse, the vaginant lamina ending in a pointed 

 apex and close to the nerve, and the highly pellucid nerve ceasing 

 far below the apex, sometimes reaching only about 3/4ths or 4/5ths 

 of the length of the leaf. 



Since the above was drawn up I have received the same species 

 from Mazoe, Southern Rhodesia, coll. Eyles (v. supra, p. 307), 

 in fruit. The seta is very short, scarcely more than 1 mm.; cap- 



