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.Candolle, Augustin Pyramus de. 1838. Prodromus Systematis Naturalis Regni Vegetabilis 7(1): 294 in LatinTropicos, Layia Hook. & Arn. ex DC.
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.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
Species Sources:Biota of North America Program 2013 county distribution maps
References
External links CalFlora Database: Layia — with species images and links. Jepson Manual Treatment — Layia USDA Plants Profile: Layia