. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 273 ment or sometimes they are substituted by a branch. The tricho- blasts are shed early and are mostly present only at the summit of the filaments. The plant is repeatedly pseudodichotomously rami- fied. The branches are erect, nearly parallel, issuing at acute angles. The tetrasporangia (Fig. 270) occur in the upper ends of the filaments, which are often several times forked. They are placed in a spiral line in long series. They are about 60« in diameter. 00 Fig. 268. Polysiphonia sphærocarp
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 273 ment or sometimes they are substituted by a branch. The tricho- blasts are shed early and are mostly present only at the summit of the filaments. The plant is repeatedly pseudodichotomously rami- fied. The branches are erect, nearly parallel, issuing at acute angles. The tetrasporangia (Fig. 270) occur in the upper ends of the filaments, which are often several times forked. They are placed in a spiral line in long series. They are about 60« in diameter. 00 Fig. 268. Polysiphonia sphærocarpa nov. spec. Part of a female plant. (About 30:1). vmdd DO 1 Fig. 269. Polysiphonia sphærocarpa nov. spec. Part of filament with branch. (About 260:1).. Fig. 270. Polysiphonia sphæ- rocarpa nov. spec. Upper end of filament with tetraspor- angia. (About 60:1). The cystocarps (Fig. 271) are nearly spherical, placed upon a short, thick stalk. They are about 80// long and of nearly the same breadth. This plant seems to show much resemblance to P. feru- lacea but it is in all respects a far more tiny plant. It was. Dansk Botanisk Arkiv, Bd. 3. Nr. 1 (1918). 18. 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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