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Introduction and Floral and General Anatomy
W. R. Philipson and B. C. Stone
Vol. 29, No. 4 (Aug., 1980), pp. 391-403
Published by: International Association for Plant Taxonomy (IAPT)
Stable URL: http://www.jstor.org/stable/1220622
Page Count: 13
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The monotypic genus Aralidium Miq. of the West Malesian floristic region has been assigned by different authors to both the Araliaceae and the Cornaceae. A renewed investigation of floral, stem, and leaf anatomy, and some other features of the genus, confirmed the absence of secretory canals, the dorsal position of the raphe and the peripheral origin of the ventral bundles; these characters preclude the assignment of Aralidium to the Araliaceae. The genus also possesses some features discordant in the Cornaceae, having lobed palisade cells, multilacunar nodes, and fibre-pits without borders. Additionally, the anisocytic stomata and glandular hairs of Aralidium are rarely found in either Araliaceae or Cornaceae. Of the possible relatives, only Griselinia, a genus of the Cornales found in South America and New Zealand, appears to be moderately close, but the two genera differ nonetheless sufficiently to favour the erection of a separate family Aralidiaceae, established herein.
Taxon © 1980 International Association for Plant Taxonomy (IAPT)