Ox-Eye (Sunflower Heliopsis; False Sunflower)

Media
Photo of three ox-eye or false sunflower flowerheads
Scientific Name
Heliopsis helianthoides
Family
Asteraceae (daisies, sunflowers)
Description

A clump-forming, spreading, branched, sunflower-like, short-lived perennial of variable height. Flowerheads about 2 inches across, distinctly orange-yellow when young, fading to light yellow; rays 8–15, usually 10. Blooms May–September. Leaves opposite on long petioles, broadly ovate to nearly triangular, without hair; with large, regular teeth. Seeds angular, while those of Helianthus species are flat.

Similar species: This is the only species of Heliopsis in Missouri. You can distinguish it from the many closely related true sunflowers (genus Helianthus) by its conical central disk and by its ray flowers, which dry out but persist, instead of withering and falling off.

Size
Height: 2–5 feet.
Where To Find
image of Ox-Eye Sunflower Heliopsis False Sunflower distribution map
Statewide, but apparently absent from the Southeast Lowlands.
Occurs in dry areas, edges of woods, roadsides, railroads, fields, and waste places. Also prairies, thickets, and open woodlands.
Ox-eye is a good native plant for sunny Missouri gardens. It tolerates dry spells, erosion, and poor soils, and its showy, butterfly-attracting flowers can be cut and used in arrangements. Several cultivars are available. Heliopsis is Greek for “sun-eye,” and helianthoides means “like a sunflower.”
Butterflies, skippers, and other insects visit the flowers for nectar, and birds, such as finches, and rodents eat the seeds.
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Similar Species

Where to See Species

This 337-acre conservation area in the middle of beautiful Crawford County, offers a sample of Ozark country that's not too far away from St. Louis. It' also the remnant of a celestial calamity.
About Wildflowers, Grasses and Other Nonwoody Plants in Missouri
A very simple way of thinking about the green world is to divide the vascular plants into two groups: woody and nonwoody (or herbaceous). But this is an artificial division; many plant families include some species that are woody and some that are not. The diversity of nonwoody vascular plants is staggering! Think of all the ferns, grasses, sedges, lilies, peas, sunflowers, nightshades, milkweeds, mustards, mints, and mallows — weeds and wildflowers — and many more!