. Dansk botanisk arkiv. Plants; Plants -- Denmark. Dictyopteris Lamx. 1. D. delicatula Lamx. Lamouroux in Journ. Phi- lom., 1809, , , A. Vickers, Phycologia Bar- badensis, part II, pi. III. Haliseris delicatula C. Ag., Species, p. 144. J. Agardh, Spec. Alg., vol. I, p. 116. KüT- zing, Tabulæ Phycologicæ, vol. IX, pi. 56, flg. II. The thailus consists of two layers of cells (Fig. 41 a) with the exception of the ribs in the edges and in middle of the frond where it is composed of several layers of cells. In transverse sections these ribs are seen to contain a string composed of
. Dansk botanisk arkiv. Plants; Plants -- Denmark. Dictyopteris Lamx. 1. D. delicatula Lamx. Lamouroux in Journ. Phi- lom., 1809, , , A. Vickers, Phycologia Bar- badensis, part II, pi. III. Haliseris delicatula C. Ag., Species, p. 144. J. Agardh, Spec. Alg., vol. I, p. 116. KüT- zing, Tabulæ Phycologicæ, vol. IX, pi. 56, flg. II. The thailus consists of two layers of cells (Fig. 41 a) with the exception of the ribs in the edges and in middle of the frond where it is composed of several layers of cells. In transverse sections these ribs are seen to contain a string composed of cells with very thick walls in which pores are present (Fig. 41 b). Of these M1Ie Vickers re- produces figures drawn by Bornet. The wall consists of cellu- lose; it is coloured blue by chlor-zinc-iodine. In a longitudinal section the cells of the strings are found to be long, cylindrical with oblique end-walls. The hairs are only present upon the one side of the thallus; they are placed many together in roundish or oval groups and occur regularly upon both sides of the mid-rib. In the basal part the plant is fastened to the substratum by means of rhizoids. These grow out Fig. 40. Dictyopteris delicatula Lamx. A part of the thallus. (About 3 : 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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