Balsamorhiza sagittata (Pursh) Nutt.

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Balsamorhiza sagittata is a North American species of flowering plant in the tribe Heliantheae of the family Asteraceae known by the common name Arrowleaf Balsamroot. It is widespread across western Canada and much of the western United States.

This is a taprooted perennial herb growing a hairy, glandular stem 20 to 60 centimetres (7+3⁄4 to 23+1⁄2 inches) tall, with the plant's total height up to 80 cm (31 in). The branching, barky root may extend over 2 metres (6+1⁄2 feet) deep into the soil. The silvery-gray basal leaves are generally triangular in shape and large, approaching 50 cm (20 in) in maximum length. Leaves farther up the stem are linear to narrowly oval in shape and smaller. The leaves have untoothed edges and are coated in fine to rough hairs, especially on the undersides.

The inflorescence bears one or more flower head, sometimes more than one on the same stem, blooming from May to July. Each head has a center of long yellowish tubular disc florets and a fringe of 8–25 bright yellow ray florets, each up to 4 cm (1+1⁄2 in) long. The fruit is a hairless achene about 8 millimetres (3⁄8 in) long.

B. deltoidea is similar but is greener, less hairy, and does not retain its ray flowers for long.

The plant's native range extends from British Columbia and Alberta in the north, southward as far as northern Arizona and the Mojave Desert of California, and as far east as the Black Hills of South Dakota. It grows in many types of habitat from mountain forests to grassland to desert scrub. It is drought tolerant.

Balsamorhiza sagittata - Wikipedia

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