BllYOPHYTA OF S. RHODESIA. 307 



infra apicem soluta. Cellulae perpellucidae , chlorophyllosae, 9ft 

 ad 1 I/a latae hexagonae, parietibus tenuibus, pellucidis. Folia 

 caulis sterilis remotiuscula, latiora, oblongo-elliptica, acuta. Folia 

 siccitate leniter fleruosa, parum mutata. 



Rhizautoica; planta cf gemmacea, polyphylla. 



Seta brevissima 2 mm. ad 3 mm.; flava ; theca erecta vel 

 inclinata, minuta, plus minusve 0.5 mm. longa, operculo conico- 

 rostellato. 



Habitat: Below the Victoria Falls, alt. 2,500 feet (Sim, 

 8891) c.fr. paucis; Victoria Falls, alt, 3,000 feet (Sim, 8882) St. 



Although one of the smaller species this is by no means an 

 inconspicuous plant, forming fair-sized tufts of a vivid green 

 colour. Dr. Sim remarks that it is a first pioneer on moist bare 

 rocks. 



F. cryptarum CM. Is perhaps the nearest species, but is a 

 much larger plant, with reddish nerve, etc. F. holstii Bioih. 

 has narrower, strongly apieulate leaves. 



Crenularia. 



Fissidens erosulus (CM.) Par. — Zimbabwe, alt. 3,000 feet 

 (Sim, 8883); Victoria Falls, alt. 3,000 feet (Sim, 8887; Wager, 

 912); Matopos, alt, 5000 feet (Sim, 8846). 



This agrees very well with C Mueller's original plant; these 

 three specimens, as in that, show some slight variation in the 

 width of the leaf and the degree of acuteness of the point; they 

 are always, however, wider above and less acuminate than in F. 

 sa/rcophyllus CM., frequently almost obtuse, and sometimes quite 

 so. The leaves are laterally very asymmetric, the nerve being 

 generally much nearer one side than the other. The cells are 

 obscure and very opaque, very densely and minutely, almost 

 invisibly papillose. Traces of an evanescent border are sometimes 

 visible on the vaginant lamina of the uppermost or perichaetial 

 leaves. 



General distribution : Niam-Niam, Uganda, Portuguese East 

 Africa. 



Crtspidium. 



Fissidens rotundatus sp. nov. Dixon (V. infra, p. 332). — 

 Tatagura Valley, Mazce, alt. 4,300 feet fEyles, 653) c.fr. 



Ambeyothallia 



Fissidens prnrrrior Broth, and Bryhn. — Victoria Falls. 

 Recorded by Brotherus (2). The only known locality, except the 

 original one in Zululand (3). 



Serrtdium. 



Fissidens corrugatulus sp. nov. Dixon. 



Eobustt/s, caespites latos, rigidos, atrovirides, aetate fusces- 

 centes instruens. Caulis simplex vel hie illic innovans ; ad 2 cm. 

 .altus, circa 3 mm. latus. Folia conferta complanata, sicca fortiter 



