Leaf anatomy ofDombeya andNesogordonia (Sterculiaceae), emphasizing epidermal and internal idioblasts |
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Authors: | Nels R. Lersten John D. Curtis |
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Affiliation: | (1) Department of Botany, Iowa State University, 50011-1020 Ames, IA, USA;(2) Department of Biology, University of Wisconsin, 54481-3897 Stevens Point, WI, USA |
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Abstract: | We studied leaf anatomy, using clearings, resin sections, and scanning electron microscopy, from mostly herbarium specimens of 123 species ofDombeya and 11 species ofNesogordonia (Sterculiaceae). Species were placed in seven idioblast categories, ranging from those without any to single and bicelled epidermal forms to multicelled nodules and single mesophyll idioblasts. Idioblast contents are possibly mucilaginous, but were not identified. In these two genera the range of foliar idioblast morphology surpasses that known previously for the entire family. Leaves are dorsiventral with mostly abaxial anomocytic stomata and typical palisade and spongy layers; paraveinal mesophyll is lacking. Miniature glandular (clavates, capitates) and nonglandular (mostly stellate) trichomes occur. Prismatic crystals predominate; epidermal prismatics and mesophyll druses are rare. |
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Keywords: | Sterculiaceae Dombeyeae Dombeya Nesogordonia Leaf anatomy epidermis stomata trichomes crystals idioblasts |
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