Plants shrubs, spreading to rounded, 5–15 (20) dm tall, 5–20 dm across; aerial flowering stems erect, 1.5–3 dm long, mostly tomentose, without one or more foliaceous bracts about mid-length; leaves in loose rosettes, the blades elliptic to ovate, 1–3 cm long, 0.5–2.5 cm wide, densely gray-lanate to tomentose abaxially, floccose or glabrous and green adaxially, the margins plane; inflorescences compound-umbellate, branched 2–4 times, the branches tomentose, without a whorl of bracts about midlength; involucral tubes 4–6 mm long, the lobes 3–5 mm long; flowers 7–10 (12) mm long, the perianth bright yellow.

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Plants herbs, usually spreading mats, 1–3 dm tall, 5–15 dm across; aerial flowering stems erect, (0.8) 1–2 dm long, thinly tomentose to floccose or glabrous, often with single foliaceous bract about mid-length; leaves in loose rosettes, the blades oblanceolate to elliptic, (0.7) 1–2 (2.5) cm long, 0.4–1 cm wide, mostly thinly tomentose abaxially, floccose or glabrous adaxially, the margins often finely wavy; inflorescences umbellate or compound-umbellate, branched 2–4 times, the branches usually floccose or glabrous, without a whorl of bracts about mid-length; involucral tubes 2–3 mm long, the lobes 2–3 (4) mm long; flowers 3–8 mm long, the perianth bright yellow.

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Plants herbs, spreading mats, 0.8–2 (2.5) dm tall, 3–6 dm across; aerial flowering stems erect, usually 0.5–1.5 dm long, tomentose, without one or more foliaceous bracts about midlength; leaves in rather compact rosettes, the blades elliptic to oval, 0.5–1.5 (1.7) cm long, 0.3–0.7 cm wide, densely white- to gray-lanate on both surfaces, the margins plane; inflorescences compound-umbellate, branched 2–5 times, the branches tomentose, without a whorl of bracts about midlength; involucral tubes 2–3 mm long, the lobes 2–3.5 (4) mm long; flowers 5–8 mm long, the perianth bright yellow.

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Plants herbs, spreading mats, 1–3 dm tall, 3–10 dm across; aerial flowering stems erect, 1–2 dm long, tomentose, without one or more foliaceous bracts about midlength; leaves in rather loose rosettes, the blades broadly elliptic, (1) 1.5–4 cm long, (0.5) 0.8–1.8 (2) cm wide, densely white-tomentose to lanate abaxially, white-tomentose and greenish, rarely some floccose or even glabrous and green adaxially, the margins plane; inflorescences compound-umbellate, 3–10 (12) cm long, the branches tomentose, without a whorl of bracts about midlength; involucral tubes (3) 3.5–5 mm long, the lobes (3) 4–6 mm long; flowers 4–7 mm long, the perianth bright yellow. Continue reading →

Plants herbs, spreading to prostrate mats, 1–4.5 (5) dm tall, 4–7 dm across; aerial flowering stems erect, 1–2.5 (4) dm long, floccose, without one or more foliaceous bracts about midlength; leaves in mostly loose rosettes, the blades elliptic to ovate, 0.5–2 (3.5) cm long, 0.5–1 (1.5) cm wide, densely lanate abaxially, tomentose to rarely floccose adaxially, the margins plane; inflorescences umbellate, the branches (2.5) 3–5 (8) cm long, floccose, without a whorl of bracts about midlength; involucral tubes 2–3 mm long, the lobes 2.5–4 mm long; flowers 6–8 (9) mm long, the perianth bright yellow.

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Plants herbs, often rather compact mats, 1–3.5 dm tall, 2–6 dm across; aerial flowering stems erect, 1–2 (3) dm long, thinly floccose or glabrous, without one or more foliaceous bracts about midlength; leaves in loose rosettes, the blades usually elliptic, 1–2 cm long, 0.5–1.5 cm wide, glabrous on both surfaces (except in central Idaho, where sparsely floccose even at full maturity), the margins plane; inflorescences umbellate, the branches 0.3–2 (2.5) cm long, without a whorl of bracts about midlength; involucral tubes 1.8–3 mm long, the lobes 1–3 mm long; flowers 4–7 mm long, the perianth bright yellow. Continue reading →

Plants herbs, mats, 1–3.5 (4) dm tall, 1–3 (5) dm across; aerial flowering stems erect, 0.7–2.5 dm long, usually tomentose, without one or more foliaceous bracts about midlength; leaves in somewhat compact rosettes, the blades usually elliptic, (0.3) 1–1.5 (2) cm long, 0.1–1 (1.2) cm wide, densely tomentose abaxially, mostly glabrous and green adaxially, the margins plane; inflorescences umbellate, the branches 3–10 (15) cm long, usually tomentose, without a whorl of bracts about midlength; involucral tubes 2–3 mm long, the lobes 2–3 mm long; flowers 4–8 mm long, the perianth bright yellow.

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Plants herbs, prostrate mats, 0.7–2 dm tall, 1–3 dm across; aerial flowering stems erect or nearly so, 0.5–1.5 dm long, floccose, without one or more foliaceous bracts about midlength; leaves in rather compact rosettes, the blades broadly elliptic, 0.5–1 (1.5) cm long, 0.5–1 cm wide, densely white-tomentose on both surfaces or slightly less so adaxially; inflorescences umbellate, the branches (2) 2.5–5 cm long, floccose, without a whorl of bracts about midlength; involucral tubes 1.5–2 mm long, the lobes 1.5–3 mm long; flowers 3–6 mm long, the perianth bright yellow.

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Plants subshrubs or herbs, spreading, 1–2.5 dm tall, 2–7 dm across; aerial flowering stems erect, 1–2 dm long, thinly floccose, without one or more foliaceous bracts about midlength; leaves in rather loose rosettes, the blades elliptic to oblong, (0.5) 1–1.5 (2) cm long, 0.4–0.8 cm wide, densely white-tomentose to lanate abaxially, white-tomentose to floccose or rarely glabrate and greenish adaxially, the margins plane; inflorescences umbellate, 1–3 cm long, the branches 1–2 cm long, thinly floccose, without a whorl of bracts about midlength; involucral tubes 3–4 mm long, the lobes 2–4 mm long; flowers (5) 6–7 mm long, the perianth bright yellow.

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