34 P. DUSEN, MOSSES FROM THE WEST OOART OF AFRIOA. 



I 



6-seriatte, vix elongatas, marginales 1 — 2-seriataj, breviores, subovales, paullum prominen- 

 tes, ceterte chlorophyllosae, obscuras, minutissimae, omnino 0,oor> mm. magna 1 , plerumque 

 rotundatae vel subovales, axe majore transverso, parietibus subincrassatis; cetera ignota. 



Habitat in Liberia in saxis, ubi prope Monroviam urbem m. Julio a. 1890 legi. 



Approaehes very near to C. rupestre, but is smaller, witli shorter, more patent and lan- 

 ceolate leaves. 



87 87 87 



Fi»'. a, pars superior folii — ; b, sectio folii ; c, cellulae basales — . 



PJ. 00, fig. 25 et 2G, planta magn. nat. 



Of the species of the genus Calymperes now described, C. rupestre is the only one, which 

 ascends to some height above the level of the sea. All other species, excepting C. asteristylum, 

 are found only in the immediate vicinity of the coast. 



As is well known, propagation by means of genimse is very comraon in this genus. They 

 are produced either around the end of the excurrent nerve or at the points of the leaves on the 

 ventral side of the expanded and eoncave nerve. Both those ways of producing geramai never 

 occur in the same species and, therefore, they are of diagnostic value. 



As described by me in another paper, x ) the rostrum of the operculum is jammed in to the 

 point of the calyptra. The fruit being ripe, the operculum is lifted off, and thus the sporee are 

 liberated. By moist or rainy weather the capsule and the operculum swell and the mouth of the 

 capsule is closed. The diagrams of the capsule of Calymperes megamitrium show the fruit in a 

 dry and in a humid condition. 



Syrrhopodon (Calymperopsis) spurio-disciformis n. sp. 



Laxe pulvinate eaespitosus, ca^spitibus flavescerite viridibns, inferne umbrinis; caulis 

 rigidus, simplex vel plerumque ramosus, plus minusve arcuatus, usque ad 2,5 cm. longus, 

 densifolius, inferne densissime radiculosus; folia sicca rigida, erecta, incurvata, convoluta, 

 humida e basi erecta vaginanteque patula, usque ad 4,5 mm. longa et 0,5 — 0,7 mm. lata, 

 lanceolata, acuta, canaliculata, marginibus plerumque sinuato-undulatis, limbata, limbo 

 flavo, circumducto, in medio folio 0,oi2 mm. lato, remotissime, prope apicem tamen densius 

 serrulato, nervö valido, basi 0,09 mm. crasso, hievi exarata; cellulce basales hyalinae, 12 — 

 16-seriatae, circiter 1 4 longitudinis folii occupantes, rectangulae, laminales chlorophyllosaB, 

 obscune, minutissima j , plerumque 0,oos mm. magnae, rotundate rectangula? vel quadratae, 

 minutissime papillosa'; folia suprema ramoruin sterilium latiora et breviora, dense et imbri- 

 cate in rosulam crateriformem conferta, e basi subcordata in laminam oblongam, attenu- 

 atam, acutam, basi caviusculam, superne planiusculam producta, basi hand limbata, eeterum 



') Dusen, P., Uber die Ausstreuung der Sporen bei den Arten der Moos-Gattung Calymperes. Botaniska Notiser. 1895. 



