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FNA | Family List | FNA Vol. 21 | Asteraceae | Balsamorhiza

8. Balsamorhiza lanata (W. M. Sharp) W. A. Weber, Phytologia. 85: 20. 1999.

Balsamorhiza hookeri Nuttall var. lanata W. M. Sharp, Ann. Missouri Bot. Gard. 22: 130. 1935

Plants 10–20(–30) cm. Basal leaves: blades white to grayish, lanceolate to linear-oblong, 10–20 × 3–6(–8) cm (1–2-pinnatifid, primary lobes lance-linear to oblong, mostly 5–40 × 1–10 mm, secondary lobes or teeth antrorse, divergent), bases cuneate to truncate, ultimate margins mostly entire (± revolute), apices rounded to acute, faces densely lanate-tomentose to villous. Heads borne singly. Involucres ± hemispheric, 12–20 mm diam. Outer phyllaries lanceolate to linear, 10–20 mm, sometimes surpassing inner, apices acute to attenuate. Ray laminae (10–)15–20 mm (abaxially puberulent or glabrous).

Flowering Apr–May(–Jun). Roadsides, grassy slopes; of conservation concern; 700–1500 m; Calif., Oreg.

Balsamorhiza lanata is known from a relatively restricted area in northern California and southern Oregon. No hybrids between it and other species have been noted.


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