Archive image from page 286 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 F. Børgesen: Rhodophyceæ of the Danish W. Indies. 279 The antheridial stands (Fig. 279) are formed by the first side- branch of the trichoblast. They are rather thick, subcylindrical, with a nearly spherical, thick-walled, sterile, apical cell; sometimes two are found. The fertile part is up to 200 « long and 60« broad. The fertile trichoblasts are found in the summit of the filaments. The antheridial plants are somewhat more slender than those with Fig. 278. Polysi
Archive image from page 286 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 F. Børgesen: Rhodophyceæ of the Danish W. Indies. 279 The antheridial stands (Fig. 279) are formed by the first side- branch of the trichoblast. They are rather thick, subcylindrical, with a nearly spherical, thick-walled, sterile, apical cell; sometimes two are found. The fertile part is up to 200 « long and 60« broad. The fertile trichoblasts are found in the summit of the filaments. The antheridial plants are somewhat more slender than those with Fig. 278. Polysiphonia ferulacea Suhr, J. Ag. a, summit of a filament; of some of the trichoblasts the basal cell is drawn only, b, summit of a plant with tetrasporangia. (About 180:1). tetrasporangia and cystocarps, the diameter of the vegetative filament reaching only about 150//—200 i. The cystocarps (Fig. 280) are large, nearly spherical, with a short stalk. They are about 350// long and broad. I have compared my plants with specimens belonging to the Botanical Museum, Copenhagen, collected by Liebman at Vera Cruz and determined by J. Agardh. Agardh had at first referred these specimens to Polysiphonia breviarticulata but in Species Al- garum, vol. II, pars III, p. 981, he alters this determination and refers Liebman's plant to P. ferulacea.
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