This introduced wildflower is a summer annual about ½2' tall that is sparingly to abundantly branched. The stems have spreading hairs; pairs of opposite leaves occur along these stems. The blades of the leaves are up to 3" long and 2" across; they are medium to dark green, dentate along their margins, and lanceolate to oval-ovate in shape. The upper surfaces of the blades are sparsely to moderately covered with appressed hairs. The slender petioles are up to 1½" long and hairy. Both terminal and axillary cymes of flowerheads are produced from the stems. These small cymes are sparingly branched. Individual flowerheads are about ¼" in across; each flowerhead has 4-6 white ray florets along its margins and numerous yellow disk florets in its center. The ray florets are very short and 3-toothed at their tips. The base of each flowerhead is surrounded by scale-like bracts that are green and oval-ovate in shape; there are approximately 2 outer bracts and several inner bracts per flowerhead. The blooming period occurs during the summer and fall and up to 3 generations of plants can be produced before winter. Both the disk and ray florets are fertile, producing oblanceoloid achenes. At the apex of each achene (whether from a disk or ray floret), there is a pappus of several membranous scales that are usually shorter than the achene. These scales spread outward as the achenes mature and assist in their distribution by wind and water. The scales of the ray florets are a little smaller than those of the disk florets, but nonetheless well-developed. The root system is very fibrous. Peruvian Daisy spreads by reseeding itself. It often forms colonies.