314 BRYOPHYTA OF S. RHODESIA. 



Barbula stuhlmannii Broth. — Vertical sides of trench on soft 

 travertine (70 to 90% earbonate of lime), Mazoe, 4,300 feet 

 (Eyles, 711). 



The long peristome shows that this is distinct from B. natalen- 

 sis and that group; it agrees very well with B. stuhlmannii from 

 Zanzibar, the only difference that I can detect being that the cells 

 are very slightly more distinct than in the specimens I have seen 

 of that species. The leaves are much narrower than in B. natalen- 

 sis, the apex more acute, slightly cucullate, and the cells less 

 opaque. 



General distribution : Zanzibar. 



Barbula salisburiensis sp. nov. Dixon. 



B. xanthocarpae CM. affinis, differt foliis angustioribus , ab 

 insertione usque ad apicem sensim angustatis, nee acuminatis, sub- 

 obtusis vel obtusis, costa dorso valde prominente, subpercurrente, 

 margine a basi usque fere ad apicem fortiter revoluto, cellulis 

 omnibus pellucidis, inferioribus breviter rectangularibus, parieti- 

 bus firmis, sensim in superiores subquadratas atgue breviter 

 rectangulares transeuntibus. Folia perichaetialia foliis caulinis 

 similia. Seta 1 cm. alta, pallide rubra. Theca elliptica, 1.5 mm. 

 longa, leptodermica, exotheeii cellulis perlaxis, irregularibus, 

 parietibus tenuibus. Peristomium praelongum, thecae longitu- 

 dinem subaequans, dentibus torquatis, pulchre rubris. 



Habitat: On bank of stream, schist formation, Salisbury, 

 alt. 4,900 feet (Eyles, 596). In small quantity, but apparently 

 quite a good species. B. xanthocarpa CM. has wider, more 

 opaque leaves and very different capsule. I do not know why 

 it is placed under Streblotrichum by Brotherus, as the perichaetial 

 leaves are in no way differentiated from the ordinary ones. 



The form of the leaves, narrowed almost from the point of 

 insertion, and with no differentiated basal part, the strong, promi- 

 nent nerve, pellucid cells, and the structure of the capsule, are 

 marked features in the present plant. Most of the allied African 

 species, of at all similar habit, moreover, have the upper cells 

 obscure and opaque and the nerve scabrous at back above. 



Barbula elongata sp. nov. Dixon. 



Perrobusta, 3 cm. ad 5 cm. alta caespites rigidos olivaceo-virides. 

 laxe cohaerentes formans. Folia patentia, sicca rigide incurvo- 

 flexuosa, 1.5 mm. ad 2 mm. longa, aequalia nee comosa, 

 laxiuscule disposita, e basi latiore sensim ligulato-lanceolata, late 

 acuta, nee acuminata, perconcava, carinata ad margines longitu- 

 dinaliter anguste plicata, marginibus ipsis nunc revolutis nunc 

 erectis. Costa valida, subpercurrens, dorso swperne scabriusrula. 

 Cellulae superiores sat distinctae, chlgrophyllosae 7/ul ad 9/x latae, 

 basilares brevissime rectangulares (vix 1.5 x 1), parietibus firmis, 

 parvae, pellucidae. Cetera ignota. 



Habitat: Danger Point, Victoria Falls, alt. 3,000 feet (Sim, 

 8895); Victoria Falls, alt, 3,000 feet (Sim, 8897, 8898). 



In the stout canaliculate nerve, scabrous above, the form and 

 submarginal plicae of the leaves, this seems to be allied to B. indica 



