NO. 3 BRITISH EAST AFRICAN MOSSES — DIXON 3 



DICRANOWEISIA AFRICANA Dixon, sp. nov. 

 (PI. I, fig. I.) 



Corticola ; densissime caespitulosa, circa i cm. alta, flavo-viridis. 

 Folia coiiferta, madida erecta. sicca crispata. e basi anguste oblonga 

 sensim acuminata, carinata, acuta ; marginibus infcrne vcl medio 

 leniter rcvolutis, supra planis, integris ; costa latiuscula, variabilis, 

 tenuis, indistincte dcHnita. Cellulae superiores majusculae, 6-8 /x 

 latae, breviter rectang'ulares vel isodiametricae, angulis rotundatis, 

 laeves ; basilares omnes laxiores, lineares vel rectangulares, angulos 

 versus saepius dilatatae, numerosae, partem hasilarem niaximam 

 oceupantes. 



Autoica. Bracteae masculae internae perconcavae convolutae, 

 obtusae. Perichaetium parvum, e foliis externis pauUo brevioribus, 

 latius acuminatis, minus acutis, internis hrevibiis, late vaginantihus, 

 obtiisis instructum. Seta brcvis, 5-6 mm. longa, theca (vetusta) 

 parva, anguste elliptica, microstoma. Operculum et peristomium 

 non visa. 



Hab. : On tree heaths, in crater, 13,000 ft.; No. 3396. 



The onl}^ two species of the genus hitherto found in Africa are the 

 widely distributed D. cirrata and D. erispitla. The latter dififers in 

 the plane margins of the leaves. The present species is very near 

 D. cirrata, but appears to be distinct in the denser tufts, smaller size 

 of all its parts, shorter capsule, and distinctly weaker nerve. 



CAMPYLOPUS ACROCAULON (C. M.) Par. 



Heath Zone and moorland, 12,000-14,000 ft.; Nos. 34i2d, 239ie, 

 3398b, 3407d, 3762. I determine these from the description alone, 

 having seen no specimens of the original plant from Kilimanjaro. 

 Sterile only. The color of the plant, length of stem, and evolution 

 of auricles vary considerably. 



CAMPYLOPUS CAGNII Negri 



jMoorland in crater, 13.500 ft.; No. 3425, c. fr. I determine this 

 with some hesitation from Negri's description of the sterile plant 

 from Ruwenzori. It appears to agree with that in every respect but 

 one : the leaves are given as 7.2 mm. in length, while here they are 

 only 4 to 5 mm. long. The crowded, rigid, almost entire leaves, only 

 the comal (fructiferous) ones finely setaceous, are rather character- 

 istic ; the nerve is smooth at back. Capsules aggregate ; calyptra 

 smooth at base. 



