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Whorl vs Obdiplostemonous - What's the difference?

whorl | obdiplostemonous |

As a noun whorl

is a pattern of concentric circles.

As a verb whorl

is to form a pattern of concentric circles.

As an adjective obdiplostemonous is

having two sets of stamens in alternating whorls, with the outer whorl opposite the petals.

whorl

English

(wikipedia whorl)

Noun

(en noun)
  • A pattern of concentric circles.
  • (botany) A circle of three or more leaves, flowers, or other organs, about the same part or joint of a stem.
  • (zoology) A volution, or turn, of the spire of a univalve shell.
  • (archaic) A flywheel, a weight attached to a spindle, compare 1460.

    • Verb

    (en verb)
  • To form a pattern of concentric circles.
  • * {{quote-news, year=2008, date=February 12, author=Jennifer Dunning, title=Modern Style, Old-Fashioned Virtues, work=New York Times citation
    • , passage=“Waves Against the Sand,” to music by Martinu, which opened the program, filled the stage space with whorling patterns of dancers surging with the gentle but ceaseless momentum of the sea. }}

    References

    * * * whorl, Glossary of Terms, American Rhododendron Society English terms with homophones

    obdiplostemonous

    English

    Adjective

    (-)
  • 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.