Layia

Layia is a genus of flowering plants in the family Asteraceae known generally as tidy tips, native to western North America. Several are California endemics.[4][5]

This article is about the genus of tidy tips. For the defunct legume genus, see Ormosia.

Layia
Layia glandulosa
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Madieae
Subtribe: Madiinae
Genus: Layia
Hook. & Arn. ex DC. 1838, conserved name, not Hook. & Arn. 183 (syn of Ormosia in Fabaceae)[1][2]
Synonyms[3]
  • Callichroa Fisch. & C.A.Mey.
  • Eriopappus Arn.
  • Oxyura DC.
  • Madaroglossa DC.
  • Tollatia Endl.
  • Calliachyris Torr. & A.Gray ex Torr. & A.Gray
  • Calliglossa Hook. & Arn.

These are erect daisylike annual herbs with dark glandular stems. The flower heads usually contain white or yellow ray florets; some species have yellow florets tipped sharply in white which give the flowers their common name. The genus is named for naturalist George Tradescant Lay, who was one of the discoverers of Layia gaillardioides.[6]

Species[3][7]

References
  1. Tropicos search for Layia
  2. The Plant List, Ormosia emarginata (Hook. & Arn.) Benth.
  3. Flann, C (ed) 2009+ Global Compositae Checklist
  4. Candolle, Augustin Pyramus de. 1838. Prodromus Systematis Naturalis Regni Vegetabilis 7(1): 294 in Latin
  5. Tropicos, Layia Hook. & Arn. ex DC.
  6. Flora of North America Vol. 21 Page 262 Layia Hooker & Arnott ex de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
  7. Biota of North America Program 2013 county distribution maps
  8. Baldwin, B. G. A new species of Layia (Compositae) from the Central Coast of California. Madroño 69(1), 88-94. 21 April 2022.
  9. Wildflowers of the Southwestern Deserts


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