. Dansk botanisk arkiv. Plants; Plants -- Denmark. grows upwards, while from the lower endo- phytic filaments growing downwards are produced (Figs. 44, 45 c and d). The last mentioned fdaments grow downwards round the assimilating filaments of the Liagora upon which the spore has germinated. They do not penetrate into the cells of the host plant but only into the mucilage and chalk incrustation found between the filaments. The main filament arising from the germinating spore remains in most of the specimens undivided in the basal part (Fig. 45 a), but specimens were found in which a single or
. Dansk botanisk arkiv. Plants; Plants -- Denmark. grows upwards, while from the lower endo- phytic filaments growing downwards are produced (Figs. 44, 45 c and d). The last mentioned fdaments grow downwards round the assimilating filaments of the Liagora upon which the spore has germinated. They do not penetrate into the cells of the host plant but only into the mucilage and chalk incrustation found between the filaments. The main filament arising from the germinating spore remains in most of the specimens undivided in the basal part (Fig. 45 a), but specimens were found in which a single or few branches were given off from near the base. In some of the more adult specimens erect filaments were found growing up from cells in the des- cending filaments (Fig. 44). On one occa- sion a descending filament was found growing out from a cell near the base of the erect filament (Fig. 44). The cells a, haMt of erect, ramified in these are about 8—11« broad and their ^ament with sporangia •^ 0, part of plant with length about 35//. - - - When the erect filaments have grown long enough to become free of the Liagora they begin to branch more freely. The branches issue from the upper end of each cell mostly in an uniseriate manner; these branches bear again branches arranged secundly. Towards their apex the branches are undivided tapering somewhat becoming about 8 fj. thick, at the same time the chromatophores are not so well developed. The chromatophore is parietal (Figs. 44, 46) with a large pyrenoid. The sporangia are broad oval and mostly pedicellate (Figs. 45 a, b, Fig. 46), placed upon æ- g^ort secund branchlets beins: seriately arranged liuin comptum o j » nov. spec. Part upon the upper, inner side of the branches. The °^.,,^ ^'^^'"^•'^* branchlets are as a rule one-celled and bear with sporangia. (About 4(1(1:1). mostly a single sometimes two sporangia. Sessile Fig. 45. Acrochætium comptum nov. spec. sporangia, c and d, bases of plants, (a,
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Keywords: ., bookcentury1900, bookcollectio, bookdecade1910, booksubjectplants
