. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 139. Fig. 144. Peyssonnelia Boergesenii no v. spec. Section through dried margin of thallus. t. topcell. (380:1). cells higher than broad, di- minishing regularly towards the periphery, the peripheral ones being the shortest of all: height 10fi, breadth 20«. This succession is, however, not always so striking as told here. The frond can easily attain a thickness of 500//, even more, for my sections do not run through the thickest part of the frond. The cells contain much gra- nules, that take a
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. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Rhodophyceæ of the Danish W. Indies. 139. Fig. 144. Peyssonnelia Boergesenii no v. spec. Section through dried margin of thallus. t. topcell. (380:1). cells higher than broad, di- minishing regularly towards the periphery, the peripheral ones being the shortest of all: height 10fi, breadth 20«. This succession is, however, not always so striking as told here. The frond can easily attain a thickness of 500//, even more, for my sections do not run through the thickest part of the frond. The cells contain much gra- nules, that take at first a golden brown colour by hydrochloric zink- iodine and become almost black under long influence of the reagens. I have only seen one nemathecium with carpospores. It had a darker colour than the frond, was ele- vated above its sur- face and irregular in form; it had a height of 240/i and the qua- dripartite, zonate car- pospores of IQOfjt, but these looked as if they were not yet quite ripe. The paraphyses ended in a short, round cell, not in a broad blunt one (Fig. 145, a). Nemathecia with antheridia were more frequent; I found them on the same plant as the carpo- spores (Fig. 145 c). This Peyssonnelia resembles P. Harvey- ana very much with. 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 work.. Dansk botanisk forening. Kbenhavn : Dansk botanisk forening