Eriogonum umbellatum var. haussknechtii

Plants herbs, typically prostrate, sprawling mats, 0.5–1.5 dm tall, 1–4 dm across; aerial flowering stems spreading to erect, 0.3–0.6 (1.5) dm long, thinly tomentose, without one or more foliaceous bracts about midlength; leaves typically in tight rosettes, the blades usually broadly elliptic, 0.5–1.5 (2.5) cm long, 0.5–1.2 (1.5) cm wide, tannish-tomentose abaxially, thinly tomentose or glabrous and olive green adaxially, the margins plane; inflorescences compact-umbellate, the branches 0.1–1.5 (2) cm long, thinly tomentose, without a whorl of bracts about midlength; involucral tubes 1.5–3.5 mm long, the lobes 1–4 mm long; flowers 2–6 mm long, the perianth bright yellow.

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Eriogonum umbellatum var. glaberrimum

Plants herbs, compact mats, 1–2.5 (3) dm tall, 3–8 dm across; aerial flowering stems erect, 1–2 dm long, glabrous, without one or more foliaceous bracts about midlength; leaves in loose rosettes, the blades narrowly elliptic to elliptic, 1–2 cm long, 0.3–1 cm wide, glabrous and green on both surfaces, the margins plane; inflorescences umbellate, the branches 3–8 cm long, glabrous, with a whorl of bracts about midlength; involucral tubes 4–5 mm long, the lobes 1–3.5 (4) mm long; flowers 4–7 mm long, the perianth cream or whitish.

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Eriogonum umbellatum var. nevadense

Plants subshrubs, mostly spreading, 1–5 dm tall, 2–6 dm across; aerial flowering stems erect, 1–3 dm long, thinly tomentose to nearly glabrous, without one or more foliaceous bracts about midlength; leaves in rather open rosettes, the blades usually elliptic, 1–2 (2.5) cm long, 0.5–1.5 cm wide, thinly tomentose to floccose abaxially, less so to thinly floccose or glabrous and green adaxially, the margins plane; inflorescences umbellate, the branches 0.3–3 (5) cm long, thinly tomentose to subglabrous, without a whorl of bracts about midlength; involucral tubes 2–3.5 mm long, the lobes 1.5–3.5 mm long; flowers 4–7 mm long, the perianth bright yellow. 2n = 80.

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Eriogonum umbellatum var. subaridum

Plants subshrubs or shrubs, spreading to erect, sometimes round, 2–7 dm tall, 3–9 (12) dm across; aerial flowering stems erect, (0.5) 1–3 dm long, floccose or glabrous, without one or more foliaceous bracts about midlength; leaves in rather loose rosettes, the blades elliptic, 1–3 cm long, 0.5–2 cm wide, thinly floccose on both surfaces or glabrous and green adaxially (glabrous on both surfaces in southern Utah, rarely tomentose abaxially in southeastern Utah), the margins plane; inflorescences compound-umbellate, branched 2–5 times, the branches floccose or glabrous, without a whorl of bracts about midlength; involucral tubes 2–3 (3.5) mm long, the lobes 1–3 mm long; flowers 3–7 mm long, the perianth bright yellow. Continue reading

Eriogonum umbellatum var. versicolor

Plants herbs, spreading to somewhat prostrate mats, 1–3 dm tall, 1–4 dm across; aerial flowering stems usually erect, 0.5–1.5 dm long, floccose, without one or more foliaceous bracts about mid-length; leaves mostly in loose rosettes, the blades usually elliptic, 0.5–1.5 cm long, 0.3–1 cm wide, thinly tomentose on both surfaces, sometimes nearly or quite glabrous and green or becoming reddish adaxially, the margins plane; inflorescences umbellate or compound-umbellate, the branches 0.5–1 dm long, without a whorl of bracts about mid-length, floccose; involucral tubes 2–3 mm long, the lobes 1–2 mm long; flowers 3–6 mm long, the perianth yellow, becoming reddish-brown to rose or pink, with large reddish spot on each midrib.

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Eriogonum umbellatum var. chlorothamnus

Plants subshrubs or shrubs, erect to rounded, (4) 5–10 (12) dm tall, 5–12 dm across; aerial flowering stems erect, 1–2.5 dm long, glabrous, without one or more foliaceous bracts about mid-length; leaves in rather loose rosettes, the blades oblanceolate to narrowly elliptic, 0.5–2 cm long, 0.3–1 cm wide, glabrous on both surfaces, the margins plane; inflorescences compound-umbellate, branched 2–5 times, the branches glabrous, without a whorl of bracts about mid-length; involucral tubes 2–2.5 mm long, the lobes 1–1.5 mm long; flowers 3–6 mm long, the perianth bright yellow.

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