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Erigeron annuus   (L. ) Pers.
Konza Prairie, Riley County, Kansas
Height: 2-5 feet
Family: Asteraceae - Sunflower Family
Flowering Period:   May, June, July, August
Also Called: White-top.
Stems: Erect, branched, firm, usually round in cross-section, sparingly to densely bristly-hairy.
Leaves: Alternate, simple; lower leaves more or less bristly-hairy, elliptic to broadly ovate, up to 4 inches long, .5 to 2.8 inches wide, (rarely larger); margins coarsely toothed; blade tapering into long stalk; stem leaves numerous, broadly lanceolate; margins mostly toothed or rarely nearly entire, conspicuously bristly-hairy near base.
Inflorescences: Corymb of several to numerous heads, broad, open, bracted.
Flowers: Involucral bracts nearly equal, glandular or long-hairy, tips tapering to points; ray florets 80-125, ligule white or rarely light blue, up to 2/5 inch long; disk florets numerous, yellow.
Fruits: Achene, egg-shaped, flattened, straw-colored, pubescent; pappus of ray florets only short scales; pappus of disk florets both hair-like bristles and short scales.
Habitat: Disturbed areas, prairies, waste ground, roadsides, and fields; open, moist or drying sites.
Distribution: East 1/2 of Kansas.
Forage Value: Sheep readily consume this weedy species and will control it through grazing. White-tailed deer eat the foliage.
 See also daisy fleabane (Erigeron strigosus) and Philadelphia fleabane (Erigeron philadelphicus).

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