. Dansk botanisk arkiv. Plants; Plants -- Denmark. 86 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. several specimens preserved in alcohol; when these are put in water they soon become turgescent and seem to assume quite the habit of the living plant. These specimens have shown themselves quite terete (Fig. 93). As far as I remember the living specimens were also terete. Normally the thallus is not constricted but in the lowermost older part of the plant narrowings are found rather often. These are, however, scarcely quite normal, it seems rather as if they ori- ginated from some kind of damage, parts o
. Dansk botanisk arkiv. Plants; Plants -- Denmark. 86 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. several specimens preserved in alcohol; when these are put in water they soon become turgescent and seem to assume quite the habit of the living plant. These specimens have shown themselves quite terete (Fig. 93). As far as I remember the living specimens were also terete. Normally the thallus is not constricted but in the lowermost older part of the plant narrowings are found rather often. These are, however, scarcely quite normal, it seems rather as if they ori- ginated from some kind of damage, parts of the thallus having been cut off and young thin filaments having grown up from the older and broader ones and in this way giving rise to the constrictions. As to the axial strand this was quite distinct through the whole thal- lus in the specimens preserved in spirit (Fig. 93), with the exception of the lowermost part quite near the base where the tissue of the plant is more compact and less translucent; in the dried specimens on the other hand it was not visible. It consists of about 20—30 broader filaments with propor- tionally tkick walls. The shape of the epidermal cells (compare Fig. 94) seems to agree exactly with the description of Setchell; they are flattened or a little convex at the upper (outer) end, closely packed, 3—Ogonal in surface view, in section quadratic to flattened rect- angular, about 22—3Sju broad and 24—30// high. Below the epidermal cells the cells with chromatophores form together a very loose cell-layer most of the cells being quite free with large open intervals between them. To judge from Setchell's description and figures the cells in my plant seem to be more elongated pyriform than those in his plant (compare Fig. 94 a). The shape and the arrangement of the cystocarps appears to be in good accordance with the description of Setchell; the cystocarps occur scattered over the whole surface of the frond (Fig. 93) and are globular to pyriform
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