Plants epiphytic or occasionally epilithic, of very striking appearance, solitary or in clusters. Rhizome thick, shortly creeping, concealed by roots and fronds; scales large, basifixed to peltate, mostly with a thickened dark central portion, margin ciliate, concolorous or pale brown; fronds clustered, extremely dimorphic; lamina fleshy, leathery, covered with stellate hairs when young; costa none, main veins conspicuous, dichotomously branched, usually several on each lobe or branch, minor veins visible or concealed, much anastomosing with free included veinlets. Basal fronds persistent, base strongly appressed to substrate, entire or forked several times; fertile foliage fronds in pairs, simple to variously dichotomously forked, erect to pendulous. Sori forming large soral patches, paraphyses many, stellate. Spores 64 per sporangium, or 8 (P. ridleyi Christ), monolete, smooth. x = 37. Epiphytes de grande taille, à rhizome rampant. Frondes dimorphes , les unes collectrices d'humus « nest leaves , » arrondies, entières ou lobées, appliquées au substratum , imbriquées, les autres normales, courtement pétiolées, pendantes, bifurquées , à surfaces plus ou moins couvertes de poils stellés. Nervures principales dichotomes, les secondaires anastomosées, formant des aréoles à nervilles incluses. Sporanges recouvrant entièrement, à la face inférieure, des portions spécialisées de la fronde , mélangés de paraphyses stellées. Epiphytes de grande taille, à rhizome rampant. Frondes dimorphes , les unes collectrices d'humus « nest leaves , » arrondies, entières ou lobées, appliquées au substratum , imbriquées, les autres normales, courtement pétiolées, pendantes, bifurquées , à surfaces plus ou moins couvertes de poils stellés. Nervures principales dichotomes, les secondaires anastomosées, formant des aréoles à nervilles incluses. Sporanges recouvrant entièrement, à la face inférieure, des portions spécialisées de la fronde , mélangés de paraphyses stellées. Plants epiphytic or occasionally epilithic, of very striking appearance, solitary or in clusters. Rhizome thick, shortly creeping, concealed by roots and fronds; scales large, basifixed to peltate, mostly with a thickened dark central portion, margin ciliate, concolorous or pale brown; fronds clustered, extremely dimorphic; lamina fleshy, leathery, covered with stellate hairs when young; costa none, main veins conspicuous, dichotomously branched, usually several on each lobe or branch, minor veins visible or concealed, much anastomosing with free included veinlets. Basal fronds persistent, base strongly appressed to substrate, entire or forked several times; fertile foliage fronds in pairs, simple to variously dichotomously forked, erect to pendulous. Sori forming large soral patches, paraphyses many, stellate. Spores 64 per sporangium, or 8 (P. ridleyi Christ), monolete, smooth. x = 37.General Information
Source: [
Morphology
Source: [
Flore du Gabon
MorphologyFlora of China @ efloras.org
General Information
