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Webster 1913 Edition


Obdiplostemonous

Ob-dipˊlo-stem′o-nous

,
Adj.
[Pref.
ob-
+
diplostemonous
.]
(Bot.)
Having twice as many stamens as petals, those of the outer set being opposite the petals; – said of flowers.
Gray.

Definition 2024


obdiplostemonous

obdiplostemonous

English

Adjective

obdiplostemonous (not comparable)

  1. (botany, of flowers) Having two sets of stamens in alternating whorls, with the outer whorl opposite the petals.
    • 1978 Hsüan Keng & Ro-Siu Ling Keng, Orders and families of Malayan seed plants: synopsis of orders and families of Malayan gymnosperms, dicotyledons, and monocotyledons, NUS Press, p173
      [...] the stamens, which are definite in number, normally obdiplostemonous (namely, the stamens are in two alternating whorls, those of the outer whorl opposite the petals – see Fig. 102) [...]
    • 1990 Klaus Kubitzki, Karl Ulrich Kramer, P. S. Green, Jens G. Rohwer & Volker Bittrich, The Families and genera of vascular plants, Volume 6, Springer, p435
      This arrangement led van Steenis (1932) to hypothesize an obdiplostemonous ancestor for the family.
    • 1996 Peter K. Endress, Diversity and evolutionary biology of tropical flowers, Cambridge University Press, p96
      Diplostemonous and obdiplostemonous flowers may also occur in the same family (e.g. Rutaceae); Zygophyllaceae are obdiplostemonous, Liliaceae are diplostemonous.
    • 2010 Louis P. Ronse De Craene, Floral Diagrams: An Aid to Understanding Flower Morphology and Evolution, Cambridge University Press, p203
      In the genus Mitella the androecium can exceptionally be more variable, ranging from obdiplostemonous to (ob)haplostemonous arrangements.