Heliopsis is a genus of herbaceous flowering plants in the family Asteraceae,Persoon, Christiaan Hendrik. 1807. Synopsis plantarum,seu Enchiridium botanicum, complectens enumerationem systematicam specierum hucusque cognitarum 2: 473 in LatinSunset Western Garden Book, 1995:606–607 native to dry prairies in North and South America.Tropicos, Heliopsis Pers. The sunflower-like composite flowerheads are usually yellow, up to in diameter, and are borne in summer. Species are commonly called ox-eye or oxeye.
The name Heliopsis (pronounced , from Greek helios for "sun" and opsis for "appearance") refers to the bright yellow color of the flowers.
Species are found widely in cultivation in temperate climates, notably varieties of H. helianthoides.
Species There are about 18 species, including: Heliopsis annua – Zacatecas, Oaxaca, Coahuila, Michoacán, Querétaro, Guanajuato, Nuevo León, Puebla, México State, Hidalgo, San Luis Potosí Heliopsis anomala – Baja California Sur Heliopsis buphthalmoides (synonym Heliopsis canescens) – Chiapas, Oaxaca, Panama, Honduras, Costa Rica, Guatemala, Colombia, Ecuador, Venezuela, Peru, Bolivia Heliopsis decumbens – Peru Heliopsis filifolia – Coahuila Heliopsis gracilis – smooth oxeye, pinewoods oxeye – southeastern and south-central United States Heliopsis helianthoides – smooth oxeye, false sunflower, oxeye, rough oxeye – most of eastern and central USA and Canada Heliopsis lanceolata – Colombia Heliopsis longipes – gold root – San Luis Potosí Heliopsis novogaliciana – Jalisco, Durango, Sinaloa Heliopsis parviceps – Guerrero Heliopsis parvifolia – mountain oxeye – northern Mexico, southwestern United States Heliopsis procumbens – Durango, Jalisco, Mexico State, Distrito Federal, Sinaloa Heliopsis sinaloensis – Sinaloa Heliopsis suffruticosa – Zacatecas
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