Achillea asplenifolia Vent.

Achillea asplenifolia Vent. Descr. PI. Cels pi. 95. 1803
Achillea rosea Desf. Tabl. 105. 1804.
Achillea Millefolium cruslala Rochel, PI. Banat. 71. 1828.
Achillea crispa Lam.; DC. Prodr. 6: 26. as synonym. 1837.
? Achillea Millefolium rosea Rand & Redf. Fl. Mt. Desert 118 1894.
Achillea Millefolium asplenifolia Farwell, Asa Gray Bull. 3: 21. 1895.
A perennial, with a creeping cylindric rootstock ; stem erect, 3-6 dm. high, sparingly silkyvillous to nearly glabrous, simple or branched above; leaves glabrous and conspicuously punctate above, sparingly villous beneath, bior tri-pirmatifid, 4-15 cm. long, the lower petioled, oblanceolate, the upper sessile, linear, 1-1.5 cm. wide; primary divisions ovate in outline, spreading, the secondary ones lanceolate or ovate, entire or few-lobed, the segments or lobes with callous lanceolate tips; heads in rather open, round-topped, corymbiform panicles; involucre campanulate, 4—4.5 mm. high, 3-4.5 mm. broad; bracts in about 4 series, nearly glabrous, keeled, the outer ovate, half as long as the oblong acute inner ones ; margins lightbrown; ray-flowers about 5; ligules nearly orbicular, rose or purple, rarely white, about 2.5 mm. long; disk-flowers 20 or more; corollas yellowish-white, 2.5 mm. long, nearly glabrous; achenes 2 mm. long, with thick margins.
Type locality: Garden of J. M. Cels, Paris, from seed supposed to come from North America.
Distribution: Nova Scotia to South Dakota and North Carolina; escaped from cultivation.