Archive image from page 360 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 Fig. 348. Asparagop- â sis taxifor- mis (Delile) Collins et they bend upwards becoming erect shoots. The branchlets are vigorously developed, conical in shape with a broad base and a more or less acute summit (cp. Fig. 347). They fix the plant to the substratum through numerous recurved rhizoids breaking out from their summits. These rhizoids are often rather long, cylindrical, with transverse walls, and attach themselves to the substra- tum: stones, shells, calcareous
Archive image from page 360 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 Fig. 348. Asparagop- â sis taxifor- mis (Delile) Collins et they bend upwards becoming erect shoots. The branchlets are vigorously developed, conical in shape with a broad base and a more or less acute summit (cp. Fig. 347). They fix the plant to the substratum through numerous recurved rhizoids breaking out from their summits. These rhizoids are often rather long, cylindrical, with transverse walls, and attach themselves to the substra- tum: stones, shells, calcareous algæ etc. The erect shoots reach a height of about 20 cm. They are barren in their basal part; richly pinnately ramified Hervev- ⢠,i . Summit' of m the upper part. the thallus. The thallus increases by means of an apical cell 250-T) from which segments are cut off by obhque walls in vari- ous directions (Fig. 348). From these segments the cen- tral cells originate and the peri- pheral cells, too, which through numerous divisions are divided into the epidermal parenchyma- tic tissue. The branches grow out at an early stage even before the seg- ments are divided. They begin as small roundish outgrowths from the segments, two from each. Of these outgrowths the largest one issues at the broadest side of the oblique segment appearing earlier than the other, smaller one, and this different stage of vigour and size of each pair of branches is kept and clearly seen later on also in the older parts of the plant. Furthermore, besides this different development, the two branches of each pair are not placed exactly opposite to each other, but a little obHquely (cp. Figs. 348, 349a). In the fully developed thallus Dansk Botanisk Arkiv, Bd. 3. Nr. X (1919). Fig. 349. Asparagopsis taxiformis (Delile) Collins et Hervey. a, part of a branch showing the ra- mification, the lowest branchlets to the right with a young cystocarp. b, transverse section of a thin branch- let, (a, about 25
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