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.