Wyethia Angustifolia (DC.) Nutt

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Wyethia angustifolia (DC.) Nutt. California compassplant Asteraceae - aster family status: State Sensitive rank: G4 / SU General Description: Adapted from Flora of North America (1993+): Taprooted perennial plants 15-60 cm tall. Basal leaf blades dark green, nearly triangular to broadly lanceolate, 15-35 cm long, margins entire or irregularly serrate, upper sides with stiff hairs. Stem leaves alternate. Floral Characteristics: Heads large, radiate, usually solitary (sometimes 2-3). Involucres hemispheric, (1.5) 2-3 cm diameter. Involucral bracts conspicuously ciliate, outer faces hairy. Ray flowers yellow, (8) 12-14; petal 15-25 mm. Disc flowers many, corollas yellow, 5-lobed. Flowers May to July. Fruits: Achenes 7-8 mm, bearing small stiff hairs. Illustration by Jeanne R. Janish, Identification Tips: The genus Balsamorhiza is similar, but ©1959 University of Washington has mostly basal leaves; flowering stems are leafless or have Press a few opposite, strongly reduced leaves. In contrast, the stem leaves of Wyethia are alternate and generally larger. Wyethia amplexicaulis grows on the east side of the Cascades in WA, has hairless or gland-dotted leaf blades, involucral bracts lacking marginal cilia, and hairless achenes. Range: WA, OR, CA, west of the Cascades and historically in the Columbia River Gorge. Habitat/Ecology: Dry or seasonally wet open ground, grassy slopes, meadows, prairies, and openings in oak and pine-oak forests; found at elevations up to 2100 m (6900 ft) throughout photo by Joe Arnett its range. Populations in WA grow in moist or dry native prairie habitats and roadside prairie remnants, at about 65 m (200 ft) elevation. Associated species include tall oatgrass (Arrhenatherum elatius), Roemer's fescue (Festuca roemeri), upland larkspur (Delphinium nuttallii), tansy ragwort (Senecio jacobaea), Queen Anne's lace (Daucus carota), oxeye daisy (Leucanthemum vulgare), and camas (Camassia quamash). Comments: Threats include mowing and competition from invasive weeds (particularly tall oatgrass). References: Flora of North America 1993+, vol. 21. photo by Joe Arnett Adapted from Field Guide to the Rare Plants of Washington http://www.washington.edu/uwpress/search/books/CAMFIE.html.

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