Taxonomic value of stamen structure in the family Ranunculaceae

doi:10.11686/cyxb20150317

Abstract

Abstract: The stamen structure of 18 genera, 37 species, and 5 varieties in the Ranunculaceae was studied in detail using morphological observation and glycol methacrylate (GMA) section methods. The surfaces of stamens were glabrous or with glandular or non-glandular hairs. The filament morphology was filiform, strap-like, clavate, long triangular or short columnar, and the intercellular space of the parenchyma was inconspicuous or substantial. The anthers in lateral view were bi-cylindrical (∞), elliptical, near circular, or strap shaped. The young anthers in transverse section were various shapes, including V, Λ, elliptical, square, bi-cylindrical, or butterfly shaped. The parenchyma cells between pollen sacs were arranged in a V shape, Λ shape, or in a line, and the parenchyma disappeared when the anthers became mature. Some anthers had a bi-cylindrical cross sectional shape in early development but became elliptical at maturity, or were had butterfly or square cross sectional shape in early development but a bi-cylindrical shape at maturity. These morphological features of the anthers and filaments were found to be stable within genera and species. This study enhances knowledge of flower morphology in the Ranunculaceae, and provides additional taxonomic criteria for use in classifying members of the Ranunculaceae.

CHENG Xinyu, LIU Mei, GUO Mengqiao. Taxonomic value of stamen structure in the family Ranunculaceae[J]. Acta Prataculturae Sinica, 2015, 24(3): 168-176.

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