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The vegetative anatomy of jaumea carnosa asteraceae a salt marsh species


, : The vegetative anatomy of jaumea carnosa asteraceae a salt marsh species. American Journal of Botany 68(3): 312-319

Certain anatomical characters of J. carnosa, a salt marsh plant, which are diagnostic, adaptive or otherwise important for an ecological anatomy study are described. The plant has a sympodial construction forming an extensively branched rhizome system and erect lateral shoots which eventually become prostrate. The leaves have few and only moderately developed succulent characters, such as, poorly defined palisade tissue, central mesophyll cells which are slightly enlarged anticlinally and a complete lack of sclerification in the mesophyll. A continuous schizogenous canal system lined with epithelial cells lies in the ground tissues of all stem forms and leaves. The phellem is composed of thin-walled, only lightly suberized cells. Very broad parenchymatous areas develop in the secondary tissues of the rhizome, associated with a slowing of vascular cambial activity which creates depressions in the axis. Adventitious roots arise from ground tissues close to the primary xylem and from interfascicular regions close to the primary phloem in the rhizomes.

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