Eriogonum species

Click on the images below to see larger versions. 

Scientific Name Eriogonum arcuatum var. xanthum (Eriogonum jamesii var. xanthum, Eriogonum flavum var. xanthum) USDA PLANTS Symbol
ERFL4
Common Name Ivy League Buckwheat ITIS Taxonomic Serial No.
823877
Family Polygonaceae (Buckwheat) SEINet
Reference
Click Here
Description Life zones and habitat: Montane to alpine (9500 to 13500); sandy, gravelly soils, in grasslands, sagebrush meadow, rocky or talus slopes, conifer woodlands and tundra.
Plant: Usually mat-forming, short perennial with stout hairy stems; up to 3 inches tall.
Leaves: Basal, oblanceolate to elliptic leaves, 1/4 to 1-1/4 inches long and 1/4 to 5/8-inch wide; grayish lower surface covered with short, matted hairs (tomentose), greenish upper has tufts of woolly hairs (floccose).
Inflorescence: Single clusters of tiny golden yellow flowers (not umbels) atop unbranched stems; each flower less than 1/4-inch across with densely hairy tepals; protruding stamens.
Bloom Period: July to September.
References: "Flora of Colorado" by Jennifer Ackerfield and Flora of North America.
BONAP Distribution Map Colorado Status:
Native
Scientific Name Eriogonum umbellatum var. umbellatum USDA PLANTS Symbol
ERUMU2
Common Name Sulfur-flower Buckwheat ITIS Taxonomic Serial No.
195595
Family Polygonaceae (Buckwheat) SEINet
Reference
Click Here
Description Life zones and habitat: Foothills to subalpine (5500 to 10000 ft); dry slopes, sagebush meadows, forests.
Plant: Mat-forming perennial with erect stems up to to 10 inches tall; stems hairy and leafless.
Leaves: Basal elliptic to ovate leaves; lower surface grayish, densely covered with fine hairs; upper surfaces green, smooth or slightly hairy; 3/8 to 1 inch long and up to 5/8-inch wide.
Inflorescence: Clusters of tiny, sometimes red-tinted, buds becoming bright yellow flowers, each less than 1/4-inch across, forming large umbels with a single whorl of green, leafy bracts just below.
Bloom Period: June to October.
References: "Flora of Colorado" by Jennifer Ackerfield, www.swcoloradowildflowers.com and Flora of North America.
BONAP Distribution Map Colorado Status:
Native

Click here for other Eriogonum species.


© Tom Lebsack 2019