<研究報告>エゾヤハズ Dictyopteris divaricata (ODAM.) OKAM. の生殖器官の構造

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Sporophytes, male and female gametophytes of Dictyopteris divaricata (OKAM.) OKAM. occurred simultaneously in natural population in the northern part of Japan. Gametophytes uncommonly occur in the present localities. Female gametophyte is reported for the first time. The structure of reproductive organs and their distribution on the thallus of this alga is uncommon among the species of Dictyopteris. All kinds of reproductive organs, tetrasporangia, oogonia and antheridia, are aggregated into sori which are produced on both sides of a midrib at the upperpart of a blade. Tetrasporangia are spherical and project on the cortex with a few flat stalk cells at the base. They divided tetrahedrally to form four spores, but occasionally remain undivided. Oogonia are ovoid and project on the cortex with one stalk cell at the base. Undivided tetrasporangium can be distinguished from oogonium by its shape and larger size. Antheridia stand on a few stalk cells and project on the cortex.
国立科学博物館の論文
1992-03-22