Archive image from page 117 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 110 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. Fig. 118. occidentalis nov. spec. Parts of the thailus. The figure to the left from a specimen preserved in alcohol, that to the right from a dried specimen. (About 1,5 :1). fronde juveniliori numerosissimæ, rectæ, clavatæ — subcylin- dricæ, summo mucronatæ, ca. 40/i longæ et 11 pt latæ. The base of the plant is a broad disc by means of which it is fastened to the substratum; it consists of numerous rhizoidal fila-
Archive image from page 117 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark03dans Year: 1913-1981 110 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. Fig. 118. occidentalis nov. spec. Parts of the thailus. The figure to the left from a specimen preserved in alcohol, that to the right from a dried specimen. (About 1,5 :1). fronde juveniliori numerosissimæ, rectæ, clavatæ — subcylin- dricæ, summo mucronatæ, ca. 40/i longæ et 11 pt latæ. The base of the plant is a broad disc by means of which it is fastened to the substratum; it consists of numerous rhizoidal fila- ments. These are dichoto- mously ramified and com- posed of cylindrical, nearly colourless cells, with uneven walls, about 14 u thick. From this basal part the erect shoots (Fig. 118) grow up in all directions. These are much branched and the ramification is more or less regularly dichoto- mous. In the lower part the thallus is terete but it soon grows flat; in the dried plant the edges are mostly prominent the thallus thus getting a ca- naliculate appearance (compare Fig. 118). The branches are about 2—3 mm broad and about 1 mm thick; the internodes taper somewhat below and are often jointed at the base. The plant preserved in spirit is not canaliculated but has broadly rounded edges. The colour of the dried plant has a greyish or dirty olive- brown tinge; in the lower part the sur- face is dull and of a mealy appearance; in the upper young parts often smooth and glossy, sometimes shining like mother of pearl and of a light greyish - yellow colour.
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