. Dansk botanisk arkiv. Plants; Plants -- Denmark. i 248 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. altogether absent, and the tissue consists then of roundish cells, larger in the middle, smaller outwards. Some of the specimens were small, often only a few centi- meters high. They often grow like low dense tufts, in which other smaller algæ find protection, e. g., Polysiphonia jerulacea, Ceramiuni etc. Other specimens (Fig. 237) are large, up to 15 cm or even more; they are much hke specimens in Maze & Schramm's collection of algæ from Guadeloupe and by these referred to Laurencia dendroidea. Th
. Dansk botanisk arkiv. Plants; Plants -- Denmark. i 248 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. altogether absent, and the tissue consists then of roundish cells, larger in the middle, smaller outwards. Some of the specimens were small, often only a few centi- meters high. They often grow like low dense tufts, in which other smaller algæ find protection, e. g., Polysiphonia jerulacea, Ceramiuni etc. Other specimens (Fig. 237) are large, up to 15 cm or even more; they are much hke specimens in Maze & Schramm's collection of algæ from Guadeloupe and by these referred to Laurencia dendroidea. They have a terete stem. The branches issue on all sides, but with some tendency to be oppo- site or verticillate. The ra- muH are nearly cylindrical or somewhat clavate. A transverse section of the older part of the thal- lus shows a tissue consisting of roundish cells of different sizes, without any trace of a central axis. In the young parts of the thallus, on the other hand, this is more clearly visible. The tetrasporangia are found in the summit of the ramuli. The cystocarps are pla- ced either upon the ramuh, or upon the branches which bear the ramuli. They are ovate- pyriform in shape, about 230// long and 110 fx broad. They open by a large orifice measuring about 60/i in diameter. var. gelatinosa (Desf.) J. Ag. J. Agardh, Spec. Alg., vol. II, n. Ill, p. 761; Epicrisis, p. Fig. 237. Laurencia obtusa (Huds.) l^amour. Part of the thallus (About 3:1).. 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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