. Dansk botanisk arkiv. Plants; Plants -- Denmark. 474 Dansk Botanisk Arkiv, Bd. 3. Nr. ]. the same branchlet) are found scattered along the branchlet often one from each segment with the exception of the lower- most. A great number of seg- ments, 10—12 or more, are present in the fructiferous part of this plant, the central cells of which are easily observable (Fig, 430 b); in H. secunda, as men- tioned above, only four to five are present. As to the ramification of the main stem 1 have gene- rally found a single bare seg- ment between those with branch- lets and branches, as shown in the dia
. Dansk botanisk arkiv. Plants; Plants -- Denmark. 474 Dansk Botanisk Arkiv, Bd. 3. Nr. ]. the same branchlet) are found scattered along the branchlet often one from each segment with the exception of the lower- most. A great number of seg- ments, 10—12 or more, are present in the fructiferous part of this plant, the central cells of which are easily observable (Fig, 430 b); in H. secunda, as men- tioned above, only four to five are present. As to the ramification of the main stem 1 have gene- rally found a single bare seg- ment between those with branch- lets and branches, as shown in the diagram (Fig. 429). But modification is often present, compare e. g. Fig. 430 a where two bare segments are found in one case. In this form in the main stem, nine pericentral cells were / present, in the erect branchlets seven only. The diameter of the branchlets was about 50 fi. In a collection af various algæ from shallow water gath- ered at the shore of Water Is- land at St. Thomas, plants with cystocarps were found. How far these plants really belong to H. tenella I dare not say with cer- tainty. The ramification, at any rate, was the common one an- swering to the diagram of it given by Falkenberg, 1. c. p. 303. As described by Falkenberg, 1. c, p. 309, pi. 3, fig. 10 the procarps are formed in the trichoblasts in the upper end of the branchlets. The branchlets, which bear the cystocarps, become. I Fig. 431. Herposiphonia spec, a and b, plants with cystocarps (compare the text), c, part of tetrasporic plant, (a and b, about 22:1; c, about 50:1.). 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
Size: 983px × 2542px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectio, bookdecade1910, booksubjectplants
