This 1–3-foot tall invasive garden daisy forms dense clumps and aggressively spreads by rhizomes along streams, meadows, and roadsides, and crowds out native species. Note the large flower head with white rays and a yellow disk. It was introduced from Eurasia as an ornamental plant and has spread across every state and into Canada.

FLOWER: June–August. Flowers 1 1/4–2 inches wide (3–5 cm) with 15–35 white rays with notched tips, and a yellow disk.

LEAVES: Basal; alternate on stem. Blades spatula to lance- shaped, or linear, 1–5 inches long (3–12 cm) with small, irregular teeth.

HABITAT: Moist to dry sandy, loamy soils of meadows, stream sides, seeps, prairies, fields, disturbed areas; pinyon-juniper, ponderosa, spruce-fir forests.

ELEVATION: 4,000–9,500 feet.

RANGE: Widespread throughout Rocky Mountains, Pacific northwest, Southwest, Midwest, Northeast U. S.

SIMILAR SPECIES: Native white, daisy-like flowers are much smaller in diameter. Spreading Fleabane, Erigeron divergens, Plains Fleabane, Erigeron modestus, and Baby Aster, Chaetopappa ericoides, have 1/2–1-inch wide flowers, and hairy stems.

NM COUNTIES: Northern and scattered in southern NM in mid- to high-elevation habitats: Bernalillo, Catron, Colfax, Lincoln, Los Alamos, Mora, Otero, Rio Arriba, Roosevelt, San Juan, San Miguel, Sandoval, Taos.