obdiplostemonous
adj1
Biology, Botany, Natural sciences Of flowers Having two sets of stamens in alternating whorls, with the outer whorl opposite the petals.
- […] 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) […]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, page 173:
- This arrangement led van Steenis (1932) to hypothesize an obdiplostemonous ancestor for the family.1990, Klaus Kubitzki, Karl Ulrich Kramer, P. S. Green, Jens G. Rohwer, Volker Bittrich, The Families and genera of vascular plants, volume 6, Springer, page 435:
2 more examples
- Diplostemonous and obdiplostemonous flowers may also occur in the same family (e.g. Rutaceae); Zygophyllaceae are obdiplostemonous, Liliaceae are diplostemonous.1996, Peter K. Endress, Diversity and evolutionary biology of tropical flowers, Cambridge University Press, page 96:
- In the genus Mitella the androecium can exceptionally be more variable, ranging from obdiplostemonous to (ob)haplostemonous arrangements.2010, Louis P. Ronse De Craene, Floral Diagrams: An Aid to Understanding Flower Morphology and Evolution, Cambridge University Press, page 203: