. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: List of species. 431 var. uvifera (Turner) J. Ag. var. occidentalis (J. Ag.) Børgs. var. lætevirens (Mont.) Web. v. Bosse, var. Lamourouxii (Turner) Web. v. Bosse. 90. Vaucheria dichotoma (L.) Ag. Phæophyceæ. Pylaiella (Bory) Kjellmann. Subgen. Bachelotia Bornet. 1. Pylaiella fulvcscens (Schousb.) Bornet. Bornet, Ed., Note sur l'Ectocarpus (Pylaiella) fulvescens Thuret (Revue generale bot., tome 1, 1889, p. 5, pi. 1); Les Algues de Schousboe (Mé Cherbourg, t. XXVIII, 1892, p. 247). Sauvageau, C, Note sur l'Ectoca
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: List of species. 431 var. uvifera (Turner) J. Ag. var. occidentalis (J. Ag.) Børgs. var. lætevirens (Mont.) Web. v. Bosse, var. Lamourouxii (Turner) Web. v. Bosse. 90. Vaucheria dichotoma (L.) Ag. Phæophyceæ. Pylaiella (Bory) Kjellmann. Subgen. Bachelotia Bornet. 1. Pylaiella fulvcscens (Schousb.) Bornet. Bornet, Ed., Note sur l'Ectocarpus (Pylaiella) fulvescens Thuret (Revue generale bot., tome 1, 1889, p. 5, pi. 1); Les Algues de Schousboe (Mé Cherbourg, t. XXVIII, 1892, p. 247). Sauvageau, C, Note sur l'Ectocarpus (Pylaiella) fulvescens Thuret (Journ. de Botanique, 1896, p. 47). Conferva fulvescens Schousboe mscr.; Icon, ined., t. 116 in Herb. Thuret. Ectocarpus fulvcscens Thuret in Algæ Schousb. no's 109—110. This peculiar plant has been found twice in two different collections inter- mingled with other algæ. As is well known from Bornet's and, more recently, from Sauvageau's descriptions of this plant it has creeping filaments fixed to the rocks by short haptera; from these creeping filaments the erect ones arise. In the material gathered I have found small fragments of the creeping filaments, but an abundance of the erect filaments, these having been cut over when collected. In most of the erect filaments an inter- calary growing zone was found in about their middle. In this zone the cells are dark coloured, the chromatophores fil- ling up nearly the whole lumen of the cells; these are all short being divided as soon as they reach a length corre- sponding to their breadth or even Fig. 408. Pylaiella fulvescens (Schousb.) Bornet. a, part of a filament with rhizoids. b, part of a filament with spor- angia, a, about 150:1; b, 70:1.). 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 botanis
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