Abstract
Leaflets of 65 species ofCaesalpinia s.l. and seven species ofHoffmannseggia were studied in clearings supplemented by resin sections and scanning electron microscopy. Three types of secretory structure occurred among 46 species; in 43 species they were distributed mutually exclusively (external glands: 8 species; internal cavities: 5 species; idioblastic cells: 30 species); three other species each had two types. Species with secretory structures conform mostly to proposed subgenera and informal “groups.” Other unusual features were external glands with internal spaces, thickened walls or conspicuous localized wall thickenings in epidermal cells or mesophyll cells of certain species, and differentially stained epidermal cells surrounding stomata. Prismatic crystals predominate but druse crystals also occur.
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Lersten, N.R., Curtis, J.D. Leaf anatomy inCaesalpinia andHoffmannseggia (Leguminosae, Caesalpinioideae) with emphasis on secretory structures. Pl Syst Evol 192, 231–255 (1994). https://doi.org/10.1007/BF00986254
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DOI: https://doi.org/10.1007/BF00986254