. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 249 Fucus gelatinosus Desfontaine, Flora Atlan- tica, Tomus II, Paris Anno 6, p. 427. Laurencia obtusa var. crucifera Kütz. Tabulæ Phycol., vol. XV, p. 20, tab. 55, figs, c—d. Hauck, Meeresalgen, p. 206. The specimens (Figs. 238—239) referred to tliis variety seem to agree very well with the description of Desfontaine, and furthermore with Hauck's variety cruci- fera, to judge by his description and by the figures of KtJTZiNG, quoted by him. Amongst these figures my plants seem most to resemble
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 249 Fucus gelatinosus Desfontaine, Flora Atlan- tica, Tomus II, Paris Anno 6, p. 427. Laurencia obtusa var. crucifera Kütz. Tabulæ Phycol., vol. XV, p. 20, tab. 55, figs, c—d. Hauck, Meeresalgen, p. 206. The specimens (Figs. 238—239) referred to tliis variety seem to agree very well with the description of Desfontaine, and furthermore with Hauck's variety cruci- fera, to judge by his description and by the figures of KtJTZiNG, quoted by him. Amongst these figures my plants seem most to resemble the plant which Küt- ziNG has called L. cyanosperma (Tab. phycol. vol. XV, pi. 58). Some of my plants also had a no less striking similarily to a spe- cimen in Maze and Schramm's algæ from Guadeloupe called Laurencia intricata. The specimens found in exposed pla- ces are slender and of very firm consi- stency, while those from more sheltered places are larger, broader and more gela- tinous, forming in this way a transition to the typical Laurencia obtusa. Upon a transverse section of the young parts of the thallus the central axis is in general easily distinguishable (Fig. 240); in one speci- men from a very exposed place (my collection no. 1491) the central axis was not visible, the whole tissue being composed, upon a transverse section, of roundish cells, largest in the middle, smaller ^i!?'^^?v/'T''fT^" outwards and all having rather thick walls. obtusa (Huds.) La- ° mour., var. gela- My specimens form mostly rather dense mtosa (Desf.) J. Ag. tufts, reaching a height of about 10 cm or more, plant. (About 3:1). The thallus is slender, pyramidally cylindrical. 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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