. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Borgesen: Rhodophyceæ of the Danish W. Indies. 65 imens was red-brown in contrast to the more dirty yellow-brown in N. Schrammt. As to the anatomical structure, this species consists in the interior of nearly colourless, long-celled, hyphæ-like, thick- walled cells running mostly in a vertical direction, interwoven and from 3—14 ;M thick. Near the periphery they are more richly ramified and bear here the horizontal assimilating filaments which radiate outwards in small bundles and branch dichotomously (Fig. 66 A). Innermost at the transitio
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Borgesen: Rhodophyceæ of the Danish W. Indies. 65 imens was red-brown in contrast to the more dirty yellow-brown in N. Schrammt. As to the anatomical structure, this species consists in the interior of nearly colourless, long-celled, hyphæ-like, thick- walled cells running mostly in a vertical direction, interwoven and from 3—14 ;M thick. Near the periphery they are more richly ramified and bear here the horizontal assimilating filaments which radiate outwards in small bundles and branch dichotomously (Fig. 66 A). Innermost at the transition from the medullary tissue the cells are rather long and nearly cylindrical but they grow soon shorter and at the same time become swollen in the middle in such a way that the cell-threads be- come moniliform, reaching a thickness of about 13— 14;/. Compared with N. Schrammt the cells are somewhat slender. The chromatophore (Fig. 66 C) is stellate and resembles very much that of N. Schrammt though as a general rule it only fills half the cell; of the outer- most ones nearest to the periphery it occurs at the top, while it is found in about the middle of the slender and more cylin- drical cells further in. In the middle of the chromatophore a pyrenoid is present. Having only dried material for examination I have not succeeded in finding the nucleus. In the middle of each of the peripheral bundles of assimil- ating filaments a single cystocarp occurs (Fig. 66 A, B); it is very rarely that a second one develops on a side-branch. While in N. Schrammt nearly all the material was in the stage of development mentioned above, viz. with the trichogynes still present, in Nemalton longtcolle nearly all the material had ripe cystocarps. These are terminally placed on a rather long straight branch, the cells of which are shorter and nearly cylindrical, Dansk Botanisk Arkiv, Bd. 3. Nr. 1 (1915). 6. Fig. ßß. Nemalionlongicolle Børgs. .4, bundle of assimilative filaments in the middl
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