BRYOPHYTA OF S. RHODESIA. 301 



Var. nanus Welw. and Duby. Syn. Trematodon pechuelii 

 CM. in "Flora," 1886, p. 508. 



On damp earth bank, alt. 4,800 feet, Salisbury (Eyles, 2169). 



I have not been able to see a specimen of T. jiechuelli, but 

 there can be no doubt that it is the same thing as this variety. 

 C Mueller does not. compare it with T. intermedins; the descrip- 

 tion suggests no difference. Roth ("Die Aussereuropaisch. 

 Laubm.," I, pp. 255, sqq.) does not mention the var.' nanus; he 

 does not compare T. pechuelii and T. intermedins specially, but 

 he gives as the one character separating the former from this and 

 other species the excurrent nerve (in T. intermedins almost or 

 quite precurrent). I have examined original specimens of 

 Welwitsch's (Nos. 9 and 20). In the former the nerve usually 

 ceases below the apex, but is occasionally quite distinctly excur- 

 rent. In the latter (var. nanus) it is generally, perhaps normally 

 excurrent. This disposes of the character as giving any value to 

 T. pechuelii. In no other way but the shorter seta does the var. 

 nanus differ from the type, and intermediate forms occur fre- 

 quently. Some plants of Sim, 8836, might be placed here. 



T. intermedins may be quite gymnostomous, or it may have 

 a very rudimentary peristome consisting of fragmentary bases 

 of teeth. This latter condition occurs in the specimen of Eyles, 

 2169. No. 2286 does not show any trace of peristome. 



General distribution : Angola, Belgian Congo, Uganda, Trans- 

 vaal. 



Trematodon mauottensis Besch. — Rua R., near Salisbury, alt. 

 5,000 feet (Eyles, 1343); Matopos, alt, 4,600 feet, on wet sandy 

 bank (Eyles, 935); Acropolis, Zimbabwe (Sim, 8819). New to the 

 African continent. A very distinct species in the very widely 

 pointed, obtuse leaves. No. 935 has the peristome in good con- 

 dition; the teeth are long, undivided , densely vertically striolate; 

 spores 22/i to 25/x. 



General distribution : Mayotte. 



Trematodon flexifolius CM. — Victoria Falls, alt. 3,000 feet 

 (Sim, 8936, 8940). 



Agrees quite well with the description of T. flexifolius. 

 Notable for the extremely long collum, and closely allied to the 

 northern T. longicoltis. New to continental Africa. 



General distribution : Island of St. Thome. 



Trematodon africanus Wager, in " Trans. Roy. Soc. South 

 Africa," IV, 4. — On wet ground under short grass, Rua R., near 

 Salisbury, alt. 5,000 feet (Eyles, 1341, 1342). 



General distribution : Transvaal, Natal. 



Aongstroemia gymnomitrioides sp. nov. Dixon. 



Rupestris. E speciebus generis africanis A . julaceae Hook, 

 proxima, longe tamen aliena ; robustior, caespites densos, siccitate 

 pallide olivaceos madore laete virides, facile dilabiles, efficiens ; 

 habitu omnino specierum nonnullarum Gymnomitrii, e.g., G. 



