6 



P. DUSEN, MOSSES FRCM THE WEST COAST OF AEliICA, 



Fissidens (Eufissidens) fluminalis n. sp. 



Syn. Fissidens Duseni C. Muller in litt. 



Caulis suberectus vel decumbens, strictus, usque ad 4 cm. altus, plerumque inferne 



ramosus et dense rufe radiculosus, madidus cura foliis 2 — 3 mm- 

 latus; folia subsecunda, humida arcuata, sicca circinate involuta 

 vel crispata, pallide viridia, patentia, usque ad 4,:. mm. louga et 

 0,63 mm. lata, e basi sensim attenuata, acinaeiformia, acuta, eliin- 

 bata, nervö valido, pallido, superne flcxuoso, excurrente; lamina 

 apicalis superne ob cellulas prominentes minutissime crenulata; 

 lamina rera ad '" :; folii producta, acuminata, margine subintegro 

 vel integro; lamina dorsalis infra basin costse rotundate oriunda, 

 margine ubique minute crenulato; cellulw obscura 1 , prominentes, 

 minutissimse, superiores 0,oo54 mm. diam., inaequales, plerumque 

 rotundae vel rotundate angulatae, basales laminae verae et apicalis 

 costain juxta majores, subpellucidse, rotundate rectangulse, parietibus 

 incrassatis; flores feminei terminales; cetera ignota. 



Habitat in Camerunia in saxis rivalibus, nbi ad Beam pagum 

 m. Julio a. 1891 legi. 



1 8 87 



Fig'. a folium — ; b cellulae apicales — . 



Pl. II. fig. 6 planta 



1,5 



Fissidens (Eufissidens) coriaceifolius C. Muller n. sp. in litt. 



Caulis erectus, simplex, siccitate fiexuosus, humiditate strictus vel strictiusculus, 

 intima basi radiculosus; folia patentia, secunda, remotiuscula, pallide viridia, sicca circi- 

 nata, humida uncinata, usque ad 2,5 mm. longa et 0,47 mm. lata, lanceolata, acuta, nervö 

 tiavo-viridi, basi 0,063 mm. crasso, vix stricto, infra summum apicem evanido, elimbata, 

 marginibus ob cellulas paullura prominentes minutissime crenulatis vel subintegris; cellulw 

 chlorophyllosse, obscuraj, minutissimae, subrotundie, 0,0067 mm. diam., inferiores paullum 

 majores, parietibus incrassatis; lamina veva paullum supra medium folium producta, acu- 

 minata, acutissima ; lamina dorsalis ad vel parum infra basim costa) plus minusve rotun- 

 date oriunda; vaginula subcylindrica, 0,6 mm. älta et 0,3 mm. crassa, aureo-flava, vetusta 

 inferne badia; seta terminalis, erecta vel suberecta, strictiuscula, circiter 5,6 mm. älta et 

 media 0,09 mm. crassa, aureo-flava, la3vissima; theca suberecta, badia, deoperculata 0,82 

 mm. longa et 0,40 mm. crassa, cylindrica, leviter curvata, sicca sub ore parum constrieta, 



