. Dansk botanisk arkiv. Plants; Plants -- Denmark. 280 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. My specimens agi^ee in the main witli the Mexican plant, only they are much more vigorously and robustly developed. The Mexican plant has more slender filaments and, moreover a taller thallus than mine, and agrees better with Harvey's figure (1. c).. Fig. 279. Polysiphonia ferulacea Suhr, J. Ag. Summit of a plant with antheridial stands. (About 125:1). That the specimens collected by me are so robustly developed is most probably due to the exposed places in which they grew. Thus they were found upon the

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. Dansk botanisk arkiv. Plants; Plants -- Denmark. 280 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. My specimens agi^ee in the main witli the Mexican plant, only they are much more vigorously and robustly developed. The Mexican plant has more slender filaments and, moreover a taller thallus than mine, and agrees better with Harvey's figure (1. c).. Fig. 279. Polysiphonia ferulacea Suhr, J. Ag. Summit of a plant with antheridial stands. (About 125:1). That the specimens collected by me are so robustly developed is most probably due to the exposed places in which they grew. Thus they were found upon the coral reef connecting the Hurri- cane Island with St. Thomas, a locality, and the peculiar algal vegetation of which I have mentioned earlier*). P. ferulacea forms here, together with Caulerpa racemosa, f. reducta, Cladophoropsis membranacea and a few other algæ, low, compact patches which are all the more strongly felted together inasmuch as most of these algæ occurring here are able to develop haptera from nearly every *j Børgesen, F., An ecological and systematic account of the Caulerpas of the Danish West Indies (Kgl. danske Vidensk. Selsk. Skrifter, 7. Rk. Naturv.-Mathem. Afd. IV, 5, 1907, p. 346).. 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 work.. Dansk botanisk forening. Kbenhavn : Dansk botanisk forening