Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . GRAPHIC MICROSCOPY. By E. T. D. No. XI.—SoRi OF Fern : Makattia HE outward appear-ance of the fruc-tification of fernshas always attract-ed observation,groups and speciesaffording greatvariety of formsvariously situated,united with per-fect symmetry, andin many casesexhibiting beautyand interest of anex t r aor dinarycharacter. The under-sideof a frond, as wellknown, revealsyellow, dust-likespots, lines, or patches, made up of groups, ormasses of receptacles (the sori) conta
Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . GRAPHIC MICROSCOPY. By E. T. D. No. XI.—SoRi OF Fern : Makattia HE outward appear-ance of the fruc-tification of fernshas always attract-ed observation,groups and speciesaffording greatvariety of formsvariously situated,united with per-fect symmetry, andin many casesexhibiting beautyand interest of anex t r aor dinarycharacter. The under-sideof a frond, as wellknown, revealsyellow, dust-likespots, lines, or patches, made up of groups, ormasses of receptacles (the sori) containing, or com-posed of, a number of minute cases (the sporangia).Their positions greatly differ, and they are scat-tered over the under-side of the frond, localised invarious parts, or confined to the very edge ; theyoriginate and are developed in the tissues, in contactwith a vein, beneath the cuticle of the leaf, aportion of which is forced up as the receptacleis developed and presses for room, and oftenremains as a delicate membrane which eventuallyconstitutes a protecting cover, (the indusium). Asmaturity increases, the indusium becomes partlydetached, sometimes entirely, a
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
