Leptosyne maritima

{{Short description|Species of flowering plant}} {{Speciesbox |image = Coreopsis_maritima_head_2003-03-11.jpg |genus = Leptosyne |species = maritima |authority = (Nutt.) A.Gray |synonyms_ref = <ref name = powo>{{cite web |title=''Leptosyne maritima'' (Nutt.) A.Gray |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:229865-1 |website=Plants of the World Online |publisher=Royal Botanic Gardens, Kew |access-date=14 March 2025}}</ref> |synonyms = *''Coreopsis maritima'' <small>(Nutt.) Hook.f.</small> *''Tuckermannia maritima'' <small>Nutt.</small> | status = G2 | status_system = TNC | status_ref = <ref name="TNC status 15 may 2022">{{cite web | url=https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.154108 | title=NatureServe Explorer 2.0 }}</ref> }}

'''''Leptosyne maritima''''', the '''sea dahlia''',<ref name=constanza/> is a species of tickseed in the sunflower family.<ref>[https://www.biodiversitylibrary.org/page/436231#page/139/mode/1up Hooker, Joseph Dalton 1876. Curtis's botanical magazine plate 6241 plus two subsequent text pages] full-page color illustration, diagnosis in Latin, description and commentary in English</ref>

''Leptosyne maritima'' is native to Southern California and Baja California, primarily in coastal California chaparral and woodlands habitats. It grows on mainland ocean bluffs in San Diego County and in northern Baja California, with a few isolated populations reported from just west of Malibu in Los Angeles County, Santa Cruz Island in Santa Barbara County, and Stoddard Canyon north of Rancho Cucamonga in extreme southwestern San Bernardino County.<ref>Proceedings of the American Academy of Arts and Sciences v.49 (1913) pg. 340</ref><ref name=constanza>[http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=10954 Calflora taxon report, University of California, ''Leptosyne maritima'' (Nutt.) A. Gray, sea dahlia ]</ref>

==Description== ''Leptosyne maritima'' is a perennial that grows 10–40 cm tall but sometimes to 80 cm (4 to 32 inches). The plant has foliage that is lobed and mostly linear in shape, with lobes that are 5–30 mm long and 1–2 mm wide. The 12–20 mm long flower phyllaries number 12–13, sometimes more, and they are lanceolate.<ref name="efloras">[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066429 ''Coreopsis maritima'' in Flora of North America]</ref>

Plants bloom in late winter to early summer, with normally one or two flower heads per stem, on 15 to 30 cm long peduncles, but sometimes 4 or more heads can be found per stem. Flower heads have 16-21 ray florets with laminae 20–35+ mm long.<ref name="efloras"/>

The disc corollas are 5.5–7 mm long.<ref name="efloras"/>

Cypselae or fruits are 6–7 mm long and oblong-rectangular.<ref name="efloras"/>

==References== {{Reflist}}

==External links== *{{Commons category-inline|Coreopsis maritima}} *Upper Taxa: Coreopsis Linnaeus sect. Tuckermannia<ref>[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=316935 eflora.org]</ref> also written as C. sect. Tuckermannia<ref>Wikispecies</ref> and Coreopsis sect. Tuckermannia *[http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?609,1008,1016 Jepson Manual Treatment: ''Coreopsis maritima''] *[https://plants.usda.gov/java/profile?symbol=COMA10 United States Department of Agriculture Plants Profile: ''Coreopsis maritima'' (Sea dahlia)] *[http://calphotos.berkeley.edu/cgi/img_query?query_src=photos_index&where-taxon=Coreopsis+maritima ''Coreopsis maritima'' — Calphotos Photo gallery, University of California]

maritima Category:Flora of Baja California Category:Flora of California Category:Plants described in 1841 Category:Taxa named by Thomas Nuttall