. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 343 which remains vegetative. Gradually, as thetetrasporangium increases in size, the last mentioned cell becomes slender and curved round the tetrasporangia; it gets a semilunar shape and its upper end becomes connected with the cell above. In this way a reticular tissue of vegetative cells is formed connecting the midrib with the not fructiferous margi- nal cells of the thallus. The antheridial stands have previously been found by Cramee. I have come across a few male plants in my material. W
. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 343 which remains vegetative. Gradually, as thetetrasporangium increases in size, the last mentioned cell becomes slender and curved round the tetrasporangia; it gets a semilunar shape and its upper end becomes connected with the cell above. In this way a reticular tissue of vegetative cells is formed connecting the midrib with the not fructiferous margi- nal cells of the thallus. The antheridial stands have previously been found by Cramee. I have come across a few male plants in my material. When Cra- mer remarks that he has foimd the anthe- ridial stands upon "kleinen Ceylonpflänz- chen", my plants were by no means especially diminutive, on the con- trary the thallus of the male plant was even lar- ger than that of the fem- ale, at any case broad- er. In the male plant the breadth of the thal- kis was two mm, in the female only about 1^ mm. The antheridial stands (Fig. 339) occur in the upper parts of the thallus as large coverings upon both sides of the thallus leaving the midrib free and mostly, too, a narrow belt of vegetative cells along the edge of the thallus. The cell-division in the male plant takes place in nearly the same way as that in the vegetative one, only the cells forming the tissue being smaller. From the surface of these cells about 2—4 small cells originate from which the spermatia are cut off. As to the cystocarps I have only found a few. As described by. Fig. 33i'. Caloglossa Leprieurii (Mont.) J. Ag. Part of a male plant with antheridial stands. (About 30:1).. 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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