P. DUSEN, MOSSES FROM THE WEST COAST OF AFKICA. 



t- c ,• 18 z ,, , , , 20 ° ,, , • , 200 7 , ,32 



■f ig- a, tona — ; b, cellulre basales — — ;■ c, cellulre apicales — - - ; (/, capsula operculata — ; e, capsula 



32 32 



humiditate — ; /, capsula siccitate — . 



142 



Pl. 00, fig. 34, pars peristomii — — ; tig. 35, planta magn. n 



at, 



Dicranella Cameruniae n. sp. 



Syn. Aongstroemia Camerunice C. Muller in litt. 



Dioica, solitarie crescens vel laxissime ciespitosa, lutescente viridis; cautis gracilis, 

 erectus vel interdum subadscendens, striotiusculus vel plus minusve arcuatus, usque ad 



/ 



2 cm. altus, pleruraque simplex vel superne innovando ramulosus, inferne remotiuscule, 

 superne densius foliosus, basim versus radiculosus; folia inferiora miuora, superiora majora, 

 usque ad 2,7 mm. longa et 0,27 mm. lata, siccitate patula, arcuata vel subcrispata, humidi- 

 tate p<-iteiitia, stricta vel curvatiuscula, e basi elongate triangulari subulate excurrentia, 

 marginibus planis, interdum inferne paullum reflexis, sumino ob cellulas prominentes 

 erosulis, ceterum integris, nervö valido, basi 0,06 mm. crasso, laevissimo, infra summum 

 apicem evanido, cellulis elongatis, rectangulis; bractece perichcetii longiores, e basi lata, 

 vaginante sat subito contractae, dein subulate reflexe elongatss; vaginula cylindrica; seta 

 erecta, stricta vel strictiuscula, circiter 8 mm. älta et medio 0,n mm. crassa, siccitate 

 sinistrorsum torta; theca erecta, stricta, symmetrica, ovalis, circiter 1 mm. longa et 0,5 mm. 



