This section is from the book "A Manual Of Weeds", by Ada E. Georgia. Also available from Amazon: A Manual Of Weeds.
Introduced. Perennial. Propagates by seeds.
Time of bloom: April to June.
Seed-lime: May to July.
Range: Maine to Virginia, westward to Michigan and Illinois.
Habitat: Lawns, grasslands, waste places.
Smaller than the preceding species, the leaves very slender, deeply pinnatifid, the backward-turning lobes very narrow and acute. Flower-heads about an inch broad, sulfur yellow, the outer row of rays purple on the under side; bracts of the involucre glaucous, the outer ones lance-shaped, spreading or ascending, the inner row linear and usually with a small horny appendage just below the tips. Achenes bright brownish red, the upper part very spinulose, the beak less than twice the length of the achene; pappus grayish white, very fine.