{{Short description|Genus of flowering plants}} {{Automatic taxobox |image = Eriophyllum confertiflorum 2003-04-07.jpg |image_caption = ''Eriophyllum confertiflorum'' <br />Voorhis Ecological Reserve <br />California State Polytechnic University, Pomona |display_parents = 3 |taxon = Eriophyllum |authority = Lag. |type_species = ''Eriophyllum staechadifolium'' |type_species_authority = Lag.<ref>lectotype designated by Constance, Univ. Calif. Publ. Bot. 18: 69. 2 Apr 1937.</ref> |synonyms = *''Actinolepis'' <small>DC.</small> *''Antheropeas'' {{small|Rydb.}} *''Bahia'' {{small|Lag.}} *''Eremonanus'' <small>I.M.Johnst.</small> *''Phialis'' {{small|Spreng.}} *''Stylesia'' {{small|Nutt.}} *''Trichophyllum'' <small>Nutt.</small> |synonyms_ref = <ref name=powo>{{cite web |title=''Eriophyllum'' Lag. |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30008830-2 |website=Plants of the World Online |publisher=Royal Botanic Gardens, Kew |access-date=11 September 2025}}</ref> }}

'''''Eriophyllum''''', commonly known as the '''woolly sunflower''', is a North American genus of plants in the family Asteraceae. The genus is native to western North America (USA, Canada, northwestern Mexico), with a concentration of narrow endemics in California.<ref>Lagasca y Segura, Mariano. 1816. Genera et species plantarum 28</ref><ref>[http://www.tropicos.org/Name/40005392 Tropicos, ''Eriophyllum'' Lag.]</ref><ref>[http://bonap.net/NAPA/TaxonMaps/Genus/County/Eriophyllum Biota of North America Program 2013 county distribution maps]</ref>

''Eriophyllum'' species are used as food plants by the larvae of some Lepidoptera species including ''Phymatopus californicus''.

==Description== ''Eriophyllum'' is an annual or perennial shrub or subshrub, some species growing to a height of 200&nbsp;cm (6.7 feet). Leaves present generally alternate and entire to nearly compound, with woolly hairs on some of the species. The inflorescence contains numerous yellow flower heads in flat-topped clusters. The involucre structure is obconic to hemispheric. Phyllaries are either free or more or less fused; the receptacle presents typically flat, but naked. The ray flowers are present in some species but not in others. Fruits are angled in the outer flowers, but are generally club-shaped for the inner flowers; the pappus is somewhat jagged.<ref>Mooring, Madroño 38:213–226, (1991)</ref><ref>[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=112066 Flora of North America ''Eriophyllum'' Lagasca]</ref>

==Species== 14 species are accepted.<ref name = powo/> {{Columns-list|colwidth=30em| *''Eriophyllum ambiguum'' <small>(A.Gray) A.Gray</small> – California, Arizona, Nevada *''Eriophyllum ambrosiodes'' {{small|(Lag.) Kuntze}} – northern and central Chile and Juan Fernández Islands *''Eriophyllum confertiflorum'' <small>(DC.) A.Gray </small> – California, Baja California *''Eriophyllum congdonii'' {{small|Brandegee}} – California *''Eriophyllum jepsonii'' {{small|Greene}} – California *''Eriophyllum lanatum'' <small>(Pursh) J.Forbes</small> – British Columbia, western USA *''Eriophyllum lanosum'' <small>(A.Gray) A.Gray</small> – Baja California, southwestern USA *''Eriophyllum latilobum'' {{small|Rydb.}} – California *''Eriophyllum mohavense'' <small>(I.M.Johnst.) Jeps.</small> – California *''Eriophyllum multicaule'' <small>(DC.) A.Gray</small> – California, Arizona *''Eriophyllum nubigenum'' <small>Greene ex A.Gray</small> – California *''Eriophyllum pringlei'' <small>A.Gray</small> – Baja California, California, Arizona, Nevada *''Eriophyllum staechadifolium'' <small>Lag.</small> – California, Oregon *''Eriophyllum wallacei'' <small>(A.Gray) A.Gray</small> – Arizona, Baja California, California, Nevada, and Utah }}

==References== {{Reflist}}

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Category:Eriophyllum Category:Asteraceae genera Category:Flora of the Americas Category:Taxa described in 1816 Category:Taxa named by Mariano Lagasca