. Dansk botanisk arkiv. Plants; Plants -- Denmark. Fig. 253. Acanthophora spicifera (Vahl) Borgs Part of a plant with antheridial stands. (About 10:1). filaments, the branches issuing from no spiny hranchlets, as is the rule Falkenberg, Rhodomelaceen, p. 226). stop their growth, becoming short branchlets. But now and then a single one of these branches grows out to filaments with continuous growth, like the main filaments. The branches and branchlets are arranged spirally with a ^/4 divergency upon the filaments. The spines are found mostly in the upper end of the branchlets. The branches issu
. Dansk botanisk arkiv. Plants; Plants -- Denmark. Fig. 253. Acanthophora spicifera (Vahl) Borgs Part of a plant with antheridial stands. (About 10:1). filaments, the branches issuing from no spiny hranchlets, as is the rule Falkenberg, Rhodomelaceen, p. 226). stop their growth, becoming short branchlets. But now and then a single one of these branches grows out to filaments with continuous growth, like the main filaments. The branches and branchlets are arranged spirally with a ^/4 divergency upon the filaments. The spines are found mostly in the upper end of the branchlets. The branches issue from the ba- sal cell of the trichoblast, just as in the case of Acanthophora orientalis, as pointed out by Falkenberg, 1. c. p. 231. In fig. 255 the summit of a plant is shown in which a great deal of the trichoblasts covering the sum- mit are taken ofY. From the basal cells of the trichoblasts we see a young branch issuing, the beginning of the branchlets or branches. It is As pointed out in my paper quoted above, this species ought to have Vahl's old name, being originally described by him from specimens from St. Croix. For further de- tails as to this matter I refer to my paper. Acanthophora spicifera is fastened to the sub- stratum by means of a lar- ge, irregularly lobed disc, from which often many erect filaments issue. It belongs to the group of species which lack spines upon the main these having at their base in the other group (comp. Most of the branches soon. Fig. 254. Acanthora spicifera (Vahli Børgs. Partof aplantwith tetrasporangia. (About 10:1).. 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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