. The algae. Algae. EUPHYCOPHYTA I51 erect filament of the macroscopic plant arises. There is thus an alternation of morphologically distinct generations in this species. Chordariaceae : Eudesme (well-binding). Fig. 82 This genus is very closely allied to Castagnea and by some workers the two genera are treated as one. The branched mucila- ginous plants are densely hairy and differ from Mesogloia funda- mentally in the presence of more than one central strand in the medulla, though there are other developmental differences as well. In the young plant^the erect filaments arise from the centre o
. The algae. Algae. EUPHYCOPHYTA I51 erect filament of the macroscopic plant arises. There is thus an alternation of morphologically distinct generations in this species. Chordariaceae : Eudesme (well-binding). Fig. 82 This genus is very closely allied to Castagnea and by some workers the two genera are treated as one. The branched mucila- ginous plants are densely hairy and differ from Mesogloia funda- mentally in the presence of more than one central strand in the medulla, though there are other developmental differences as well. In the young plant^the erect filaments arise from the centre of the. '?N^DULLA- Fig. 82 Eudesme virescens. A, plant. B, diagram to illustrate thallus construction (multiple strand type). = colourless hair, = primary assimilator, 5".^. = secondary assimilator, secondary cortex, — secondary subcortex, ^.Af. = secondary medulla. C, apex ( x i6o). D, thallus with branch and corticating filament ( x 75). E, unilocular sporangia. F, plurilocular sporangia. (A, E, F, after Oltmanns; B-D, after Parke.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Chapman, V. J. (Valentine Jackson), 1910-. London, Macmillan; New York, St. Martin's Press
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Photo credit: © Library Book Collection / Alamy / Afripics
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, booksubjectalgae
