. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Phæophyceæ of the Danish W. Indies. 17 6. Ectocarpus breviarticulatus J. Ag. J. Agardh, Nya alger från Mexico (Öfversigt af K. Forhandl. 15. Jan., 1847, p. 7). Ectocarpus hamatus Cr. in Maze et Schramm, Essai de classification des Algues de la Guadeloupe, 2e Edit. 1870-1877, p. 111. Vickers, A., Phycologia Barbadensis, part II, pi. 29. By means of original specimens collected by Liebmann near St. Augustin in Mexico and determined by J. Agardh I have been able to see that Ectocarpus hamatus of Crouan, so well figured
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Phæophyceæ of the Danish W. Indies. 17 6. Ectocarpus breviarticulatus J. Ag. J. Agardh, Nya alger från Mexico (Öfversigt af K. Forhandl. 15. Jan., 1847, p. 7). Ectocarpus hamatus Cr. in Maze et Schramm, Essai de classification des Algues de la Guadeloupe, 2e Edit. 1870-1877, p. 111. Vickers, A., Phycologia Barbadensis, part II, pi. 29. By means of original specimens collected by Liebmann near St. Augustin in Mexico and determined by J. Agardh I have been able to see that Ectocarpus hamatus of Crouan, so well figured in the "Phycologia" of Mlle Vickers belongs to this species. As the description of J. Agardh is rather deficient and Mlle Vickers in her "Liste" does not give any descrip- tion of it I here men- tion it in a little more detail. The plant forms rather large tufts, 2— 4 cm high or even more, and these tufts are again composed of thinner and thicker rope-like spongy mas- T-v n ,, Fig. 10. Ectocarpus breviarticulatus J. Ag. ses. By means ol the ° t. -xt, i i i • J a, a branch with young plunlocular sporangia. numerous hooks and b, cells with chromatophores and a ripe pluri- short bent ramuli, locular sporangium, c a hookformed ramulus. ' d, a branch with rhizoid-hke apex. spread along the main (a, c and d, about 90 :1; b, about 190 :1). filaments the whole becomes twisted together just as in Ectocarpus tomentosus. The growth takes place at any point in the filaments. These are about 27 fi thick. The length of the cells is usually 1—2 times their own diameter, rarely a little shorter or longer. The plurilocular sporangia are nearly spherical in shape or somewhat ovoid (Fig. 10 b). They are placed nearly at right angles upon the filaments and have a very short stalk consisting only of a single small cell. The length of the sporangia is about 62 [i; the breadth about 57 ft. Unilocular sporangia were not found. Instead of hooks the ramuli sometimes run
Size: 1962px × 1273px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectio, bookdecade1910, booksubjectplants
