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Doubled sepals?
editThe article says that doubling is due to multiple petals, but in such plants as double flowered tulips and narcissus with a showy perianth rather than just a showy corolla, it may well be due to double sepals as well. Imc (talk) 19:45, 3 February 2009 (UTC)
New book (2018)
editNew (2018) book ... haven't yet read it.
- Double flowers : the remarkable story of extra-petalled blooms.
- Author: Nicola Ferguson; Charles Quest-Ritson
- Publisher: [London] : Pimpernel Press Ltd, [2018].
- http://www.worldcat.org/title/double-flowers-the-remarkable-story-of-extra-petalled-blooms/oclc/986738980&referer=brief_results
Double-flowered is not a frequent topic of literature. WorldCat lists a few recent articles, but the above appears to be the first new book specific to the topic since 1983 (below):
- Double flowers : a scientific study
- Author: Joan Reynolds John Tampion
- Publisher: New York [u.a.] Scientific and Acad. Ed. ©1983
- http://www.worldcat.org/title/double-flowers-a-scientific-study/
Double / sterile flowers are gaining topical interest as a factor impacting pollinators.