flower_perianth_phyllotaxis

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• Label: Perianth phyllotaxis
• Entity URI: https://w3id.org/APD/traits/trait_0012465
• Type: categorical
• Definition: A perianth morphology trait [TO:0000275] which is the phyllotaxy [TO:0006014] of the perianth [PO:0009058] parts (petals [PO:0009032], sepals [PO:0009031], and tepals [PO:0009033]), at anthesis [PO:0009068];Perianth phyllotaxis at anthesis.
• Additional comments: Perianth parts may be organised in one or more whorls or along a continuous spiral, usually with wide divergence angles more or less equal to 137.5 degrees. Less frequently, perianth phyllotaxis may be irregular. Perianth phyllotaxis at anthesis may differ from phyllotaxis of perianth part primordia at their inception and it is not uncommon that spirally initiated perianths become whorled later through development. Definition and trait values derived from Schoenenberger et al. (2020) for their character '230. Perianth phyllotaxy (D1)', with more information of differentiating between trait values in this manuscript.
• Allowed values:

  value	description
  irregular	Perianth parts lacking any symmetrical organisation.
  spiral	Perianth parts organised along a continuous spiral, usually with wide divergence angles more or less equal to 137.5 degrees, the Fibonacci 'golden angle'.
  whorled	Perianth parts organised in one or more whorls.

See the AusTraits Plant Dictionary (https://w3id.org/APD/traits/trait_0012465) for additional information about this trait.

Coverage

For this trait, AusTraits includes a total of 1,554 records. This includes:

• data for 1,480 species.
• data for 220 families.
• data from 2 datasets (see the portal Citations tab for a list of sources)