Eriogonum umbellatum var. majus

(Sub-alpine Sulphur-flower)

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Eriogonum umbellatum var. majus, Lower Cataract Lake, Summit Co. 0848/0864

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Eriogonum umbellatum var. majus, Frisco Peninsula, Summit Co. 1627

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Eriogonum umbellatum var. majus, North Swan Valley, Summit Co. 6019

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Eriogonum umbellatum var. majus, Frisco Peninsula, Summit Co. 5475

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Eriogonum umbellatum var. majus, Breckenridge, Summit Co. 1201

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Eriogonum umbellatum var. majus, Frisco Peninsula, Summit Co. 1620

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Upper leaf surface, Eriogonum umbellatum var. majus, Frisco Peninsula, Summit Co. 1633

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Lower leaf surface, Eriogonum umbellatum var. majus, Frisco Peninsula, Summit Co. 1631

Scientific Name Eriogonum umbellatum var. majus USDA PLANTS Symbol ERUMM
Common Name Sub-alpine Sulphur-flower, Sulphur-flower Buckwheat ITIS Taxonomic Serial No. 528020
Family Polygonaceae (Buckwheat) SEINet
Reference
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Description Life zones and habitat: Foothills to alpine (6500 to 12800 ft); dry slopes, sagebush meadows, forests or tundra.
Plant: Mat-forming perennial with erect stems 6 to 12 inches tall; stems hairy to smooth, leafless.
Leaves: Basal leaves oblanceolate to elliptic, lower surface grayish, densely covered with fine hairs; upper surfaces green, smooth or somewhat hairy; 3/8 to 3/4-inch long and up to 5/8-inch wide.
Inflorescence: Clusters of tiny, sometimes red-tinted, buds becoming creamy-white flowers, each less than 1/4-inch across, in large umbels with a single whorl of green, leafy bracts just below.
Bloom Period: June to September.
References: "Flora of Colorado" by Jennifer Ackerfield and Flora of North America.
BONAP Distribution Map

Colorado Status:
Native

© Tom Lebsack 2022

Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County