NO. 3 BRITISH EAST AFRICAN MOSSES DIXON I5 



erecta. Seta i. 25-1. 5 cm. longa, laevis. Theca snherccta, cylindrica, 

 vix curvata, operculo curvirostro, subaequilongo. 



Hab. : Heath Zone, 12,000 ft., epiphytic; Nos. 3447, 3770. 



It is rather difficult to diagnose the somewhat numerous species of 

 this section; but if habit, length of seta, form of capsule, and leaf 

 outline are taken into account, it will be found that there are no 

 African species very near this plant. R. brachytlicciifonue (C. J\I.) 

 is more robust, with a foliation strikingly like that of Brachythccmui 

 albicans, and a different coloring. R. rivulctonim is smaller, of 

 different habit, greener, with less crowded leaves, and horizontal or 

 subpendulous capsule. 



BRACHYTHECIACEAE 

 PLEUROPUS SERICEUS (Hornsch.) Broth. 

 Heath Zone, 12,000 ft., epiphytic; Nos. 3759b, 3759c; st. 



BRACHYTHECIUM VELLEREUM (Mitt.) Par. 



Heath Zone, 12,000 ft. ; No. 3756c. On tree heaths in crater, 

 13,000 ft.; No. 3441. Both fruiting, I have compared this with 

 Mitten's plant, and there is no doubt of its identity. It is a very 

 striking species, but it is certainly autoicous. Mitten describes his 

 plant as dioicous, and I have found fruiting stems on which I have 

 been unable to detect male flowers, but there is no C[uestion that it 

 is normally autoicous. 



I suspect B. gloriosum (C. M.) Par., of which the sterile plant 

 only w^as described, to be the same thing. 



BRACHYTHECIUM UGANDAE Dixon, sp. nov. 



Subgen. Salebrosium. Robustum ; hitco-aureimn, nifiditni, habitu 

 B. salcbrosi. Caules suberecti, irregulariter distanter ramosi, fiexuosi, 

 subicrctes, acutiusculi. Folia e basi subcordata late ovato-lanceolata, 

 in acumen anguste nee longe tenuiter acuminatum sat cito attenuata, 

 integerrima, profunde plicata, marginibus planis vel supcrnc anguste 

 recurvis ; costa basin versus sat valida, cito multo attenuata, circa 

 dimidian partem folii attingens. Cellulae angustissimae, pellucidae, 

 alares mnltac, majuscidac, subquadratae, inanes vel obscuriusculae, 

 bene notatae. Flores masculi majusculi, turgidi. 



Autoicum. Perichaetia magna, foliis erectis, in acumen filiforme 

 flexuoso-recurvum integrum attenuata. Seta i. 5-1. 75 cm. longa, 

 laevis ; theca badia, suberecta, Icniter curvata, oblonga, operculo 

 brevi, obtuso. 



