Some observations on the homology of the daffodil corona
© The Systematics Association 2013. Flowers of the genus Narcissus (the daffodils) contain a corona, a cup-shaped structure, positioned between the stamens and tepals (Fig 12.1a). The identity and homology of this structure has been a source of debate and confusion for more than a century (Doell, 1857; Masters, 1865; Smith, 1866; Eichler, 1875; Pax, 1888; Celakovsky, 1898; Velenovsky, 1907, 1910; Goebel, 1933; Arber, 1937; Singh, 1972). Here I provide a short review of this issue, which explains the context for an ongoing developmental genetics research study attempting to ascertain the homology of the daffodil corona.