Layia

{{Short description|Genus of flowering plants}} {{about|the genus of tidy tips|the defunct legume genus|Ormosia}} {{Automatic taxobox |image = Layia_glandulosa_white_layia_flower_bud.png |image_caption = ''Layia glandulosa'' |display_parents = 3 |taxon = Layia |authority = Hook. & Arn. ex DC. 1838, conserved name, not Hook. & Arn. 183 (syn of ''Ormosia'' in Fabaceae)<ref>[http://www.tropicos.org/NameSearch.aspx?name=Layia&commonname= Tropicos search for Layia]</ref><ref>[http://www.theplantlist.org/tpl1.1/record/ild-31868 The Plant List, ''Ormosia emarginata'' (Hook. & Arn.) Benth.]</ref> |synonyms_ref = <ref name=u/> |synonyms = * ''Callichroa'' Fisch. & C.A.Mey. * ''Eriopappus'' Arn. * ''Oxyura'' DC. * ''Madaroglossa'' DC. * ''Tollatia'' Endl. * ''Calliachyris'' Torr. & A.Gray ex Torr. & A.Gray * ''Calliglossa'' Hook. & Arn. }}

'''''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.<ref>[https://www.biodiversitylibrary.org/item/7156#page/299/mode/1up Candolle, Augustin Pyramus de. 1838. Prodromus Systematis Naturalis Regni Vegetabilis 7(1): 294] in Latin</ref><ref>[http://www.tropicos.org/Name/40002846 Tropicos, ''Layia'' Hook. & Arn. ex DC.]</ref>

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''.<ref>[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=117774 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]</ref>

== Species== Sources:<ref name=u>[https://archive.today/20141212233707/http://dixon.iplantcollaborative.org/CompositaeWeb/default.aspx?Page=NameDetails&TabNum=0&NameId=244f26b6-0b81-49b7-b966-f3a27029ace3 Flann, C (ed) 2009+ Global Compositae Checklist ]</ref><ref>[http://bonap.net/NAPA/TaxonMaps/Genus/County/Layia Biota of North America Program 2013 county distribution maps]</ref> {{columns-list|colwidth=30em| * ''Layia calliglossa'' - CA * ''Layia carnosa'' - beach tidytips - CA * ''Layia chrysanthemoides'' - smooth tidytips - CA * ''Layia discoidea'' - rayless tidytips - CA * ''Layia douglasii'' - OR WA * ''Layia elegans'' - CA * ''Layia erubescens'' - CA<ref>Baldwin, B. G. [https://bioone.org/journals/madro%c3%b1o/volume-69/issue-1/0024-9637-69.1.88/A-NEW-SPECIES-OF-LAYIA-COMPOSITAE-FROM-THE-CENTRAL-COAST/10.3120/0024-9637-69.1.88.short A new species of ''Layia'' (Compositae) from the Central Coast of California.] ''Madroño'' 69(1), 88-94. 21 April 2022.</ref> * ''Layia fremontii'' - Frémont's tidytips - CA * ''Layia gaillardioides'' - woodland tidytips - CA * ''Layia glandulosa'' - white daisy tidytips - CA AZ NM NV UT ID OR WA, Baja California<ref>[http://www.wildflower.org/clearinghouse/slide_shows/Southwestern_Desert/13_JPG.html Wildflowers of the Southwestern Deserts]</ref> * ''Layia heterotricha'' - pale yellow tidytips - CA * ''Layia hieracioides'' - tall tidytips - CA * ''Layia hispida'' - CA * ''Layia jonesii'' - Jones' tidytips - CA * ''Layia leucopappa'' - Comanche Point tidytips - CA * ''Layia munzii'' - Munz' tidytips - CA * ''Layia nemorosa'' - CA * ''Layia pentachaeta'' - Sierra tidytips - CA * ''Layia platyglossa'' - common tidytips - CA AZ UT * ''Layia septentrionalis'' - Colusa tidytips - CA }}

==References== {{Reflist}}

==External links== * [http://www.calflora.org/cgi-bin/specieslist.cgi?where-genus=Layia CalFlora Database: ''Layia''] — ''with species images and links''. * [http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,1504 Jepson Manual Treatment — ''Layia''] * [https://plants.usda.gov/java/profile?symbol=LAYIA USDA Plants Profile: ''Layia''] * {{Commons category-inline|Layia}}

Category:Layia Category:Asteraceae genera Category:Flora of Northern America