Original Research

Smodirignium dermatitis: the intercellular secretory canals of the aerial axis and their relationship to this toxicity

R. P. Ellis
Bothalia | Vol 11, No 3 | a1456 | DOI: https://doi.org/10.4102/abc.v11i3.1456 | © 1974 R. P. Ellis | This work is licensed under CC Attribution 4.0
Submitted: 12 November 1974 | Published: 04 December 1974

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R. P. Ellis, Botanical Research Institute, Department of Agricultural Technical Services, South Africa

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Abstract

Smodingium argutum E. Mey. ex Sond., closely related to the American poison-ivy,  Toxicodendron radicans (L.) Kuntze, is the only known indigenous member of the Anacardiaceae in South Africa
causing dermatitis. The sap of the intercellular secretory canals of the stem, petiole and leaf of both plants, is responsible for this toxicity. These secretary canals are described, illustrated and compared
for both species, and their formation and the function of the canals and sap, are briefly discussed.

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