. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Phæophyceæ of the Danish W. Indies. 15 ovalia—rectangularia, 33// long, et 22// lat., interdum elongata clavataque usque ad 64 // long., 27// lat. Growing upon an old Pa- dina together with some other Ectocarpi were found a few specimens of a small Ectocarpus. The plant had creeping, irregularly bent, basal filaments from which the erect filaments grow up (Fig. 9 /). The cells in the basal, rhizoidal filaments have rather thick walls and are about three times as long as broad, the diameter being about 8—9 //. The erect filaments h
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Phæophyceæ of the Danish W. Indies. 15 ovalia—rectangularia, 33// long, et 22// lat., interdum elongata clavataque usque ad 64 // long., 27// lat. Growing upon an old Pa- dina together with some other Ectocarpi were found a few specimens of a small Ectocarpus. The plant had creeping, irregularly bent, basal filaments from which the erect filaments grow up (Fig. 9 /). The cells in the basal, rhizoidal filaments have rather thick walls and are about three times as long as broad, the diameter being about 8—9 //. The erect filaments have cylindrical cells, which in the lower part of the filaments are 2—3 times as long as their own diameter, which is about 11//. Higher up the cells can reach a length of up to 150 (j. or nearly 14 times their own breadth. The long cells in the end of the filaments make these hairlike, and are devoid or al- most devoid of chromatophores etc. (Fig. 8). The growth of the filaments takes place by divi- sion of the cells in the middle and lower part of the filament. A marked growing zone is found at times, but not always. The chromatophore is ribbonlike and irregularly rami- fied (Fig. 9 b). From the cells in the middle and lower part of the filaments thin rhizoids are occasionally found growing downwards (Fig. 9 a).. Fig. 8. Ectocarpus nov, spec. Part of a plant. (About 40 :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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