Abstract
Two types of foliar trichomes, both T-shaped with a uniseriate stalk and a single transverse cell, are used to document natural hybridization betweenVernonia lindheimeri Engelm. & Gray andV. interior Small in central Texas. The putative hybrid, known asV. guadalupensis Heller, has the same type of foliar trichomes but their stalks are neither as long as those ofV. interior nor as short as those ofV. lindheimeri. The transverse cells of the more conspicuous trichome type are also of intermediate size.
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Supported by National Science Foundation Grants GE-6939 (to the senior author) and GE-3069 (Research Participation for College Teachers Program to the Department of Botany, The University of Texas).
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Hunter, G.E., Austin, D.F. Evidence from trichome morphology of interspecific hybridization in Vernoma: Compositae. Brittonia 19, 38–41 (1967). https://doi.org/10.2307/2805081
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DOI: https://doi.org/10.2307/2805081