. Dansk botanisk arkiv. Plants; Plants -- Denmark. Fig. 120. Galaxaura occidentalis noy. spec. Transverse section of the peri- pheral tissue shovving the campanulate chromatophores with the large pyre- noid above. Below the nucleus is maid visible by staining, (About 370:1).. these cells and the epidermal ones many and often large intervals are present, here the chalk incrustation especially is found forming a circular belt round the whole thallus. The epidermal cells are closely united ; they are rounded-trigonal when seen in transverse section (Figs. 119,120), 5—7-gonal when seen from above
. Dansk botanisk arkiv. Plants; Plants -- Denmark. Fig. 120. Galaxaura occidentalis noy. spec. Transverse section of the peri- pheral tissue shovving the campanulate chromatophores with the large pyre- noid above. Below the nucleus is maid visible by staining, (About 370:1).. these cells and the epidermal ones many and often large intervals are present, here the chalk incrustation especially is found forming a circular belt round the whole thallus. The epidermal cells are closely united ; they are rounded-trigonal when seen in transverse section (Figs. 119,120), 5—7-gonal when seen from above (Fig. 121). They are about 16/i high and their diameter varies from 18—30/i. They have a well developed, campanulate chromatophore with a central pyrenoid (Figs. 120,121). Also in the cell-layer below the cells have chromatophores but less developed while the innermost cells have no chromatophores at all. Finally growing out from nearly all the surface cells we find the onecelled papillæ, characteristic to the group of Vepreculæ, by means of which the capacity of the assimilating tissue is so highly increased. The Fig. 121. Galaxaura occidentalis Epidermal cells seen from above showing the elegantly shaped chromatophore with the pyrenoid in the middle. (About 500:1).. 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 Dansk botanisk forening. Kbenhavn : Dansk botanisk forening
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Keywords: ., bookcentury1900, bookcollectio, bookdecade1910, booksubjectplants
