Burke: Eriogonum strictum vs. Eriogonum douglasii

	Eriogonum strictum	Eriogonum douglasii
	strict buckwheat	Douglas's buckwheat
Habit	Perennial with woody stems up to 1 dm. long, the several flowering stems to 3 dm. tall, usually white-woolly throughout and more or less freely branched.	Low, matted subshrubs 5 to 15 cm. in height.
Leaves	Mostly basal, the blades elliptic to ovate, 5-25 mm. long, usually white-woolly on the lower surface and less so on the top, on petioles as long to 4 times as along as the blades.	Numerous, linear to linear-spatulate, 5 to 20 mm. long, gray- or white-woolly on both surfaces, especially the lower.
Flowers	Flowering stems leafless, the inflorescence from open and freely branched with the involucres single at the branch tips to umbellate and the involucres somewhat clustered; with small, linear bracts at the forks of the branches; involucres narrowly cup-shaped, with 5 triangular, erect, short teeth; tepals white or cream to pinkish or yellow, 3-4 mm. long, divided nearly to the non-stipitate base, the segments oblong, the outer twice as broad as the inner.	Flowering stems 5-10 cm. long, with a whorl of bracts at mid-length, and generally a single, terminal cup-shaped involucre of 6-10 oblong, white-wooly lobes about 3 mm. long. Flower buds blood-red, opening to cream-colored or slightly pinkish or yellowish tepals, 6-8 mm. long with a stipe-like base 1-2 mm. long

	Eriogonum strictum	Eriogonum douglasii
Identification notes	Eriogonum strictum plants with the branched inflorescence may be separated from the similar E. niveum by the bracts at the branch joints, which are small and thread-like in E. strictum and leaf-like in E. niveum. The E. strictum plants with umbellate and somewhat compressed flower clusters may be confused with E. ovalifolium when the tight, head-like flower clusters of the latter are in umbels instead of single.	Separate from the similar Eriogonum thymoides by the involucre lobes; E. thymoides has erect lobes, E. douglasii, reflexed to spreading lobes.
Flowering time	May-July	May-July
Habitat	Sandy or rocky soils, sagebrush desert to ponderosa pine forests.	Sagebrush or juniper flats to ponderosa pine forests, often on lithosol.
Distribution	Occurring east of the Cascades crest in Washington; Washington to California, east to Montana, Idaho, and Nevada. [WildflowerSearch map] [BONAP county map]	Occurring east of the Cascades crest in Washington, chiefly in the central region; Washington to California, east to Idaho and Nevada. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Not of concern
Sibling taxa	E. baileyi, E. cernuum, E. codium, E. compositum, E. douglasii, E. elatum, E. flavum, E. heracleoides, E. maculatum, E. marifolium, E. microtheca, E. niveum, E. nudum, E. ovalifolium, E. pyrolifolium, E. sphaerocephalum, E. thymoides, E. umbellatum, E. vimineum	E. baileyi, E. cernuum, E. codium, E. compositum, E. elatum, E. flavum, E. heracleoides, E. maculatum, E. marifolium, E. microtheca, E. niveum, E. nudum, E. ovalifolium, E. pyrolifolium, E. sphaerocephalum, E. strictum, E. thymoides, E. umbellatum, E. vimineum
Subordinate taxa	E. strictum var. anserinum, E. strictum var. proliferum, E. strictum var. strictum	E. douglasii var. douglasii
Web links	Local floras: CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Eriogonum douglasii

strict buckwheat

Douglas's buckwheat

Habit

Perennial with woody stems up to 1 dm. long, the several flowering stems to 3 dm. tall, usually white-woolly throughout and more or less freely branched.

Low, matted subshrubs 5 to 15 cm. in height.

Leaves

Mostly basal, the blades elliptic to ovate, 5-25 mm. long, usually white-woolly on the lower surface and less so on the top, on petioles as long to 4 times as along as the blades.

Numerous, linear to linear-spatulate, 5 to 20 mm. long, gray- or white-woolly on both surfaces, especially the lower.

Flowers

Flowering stems leafless, the inflorescence from open and freely branched with the involucres single at the branch tips to umbellate and the involucres somewhat clustered; with small, linear bracts at the forks of the branches;

involucres narrowly cup-shaped, with 5 triangular, erect, short teeth;

tepals white or cream to pinkish or yellow, 3-4 mm. long, divided nearly to the non-stipitate base, the segments oblong, the outer twice as broad as the inner.

Flowering stems 5-10 cm. long, with a whorl of bracts at mid-length, and generally a single, terminal cup-shaped involucre of 6-10 oblong, white-wooly lobes about 3 mm. long. Flower buds blood-red, opening to cream-colored or slightly pinkish or yellowish tepals, 6-8 mm. long with a stipe-like base 1-2 mm. long

Eriogonum strictum

Eriogonum douglasii

Identification notes

Eriogonum strictum plants with the branched inflorescence may be separated from the similar E. niveum by the bracts at the branch joints, which are small and thread-like in E. strictum and leaf-like in E. niveum. The E. strictum plants with umbellate and somewhat compressed flower clusters may be confused with E. ovalifolium when the tight, head-like flower clusters of the latter are in umbels instead of single.

Separate from the similar Eriogonum thymoides by the involucre lobes; E. thymoides has erect lobes, E. douglasii, reflexed to spreading lobes.

Flowering time

May-July

Habitat

Sandy or rocky soils, sagebrush desert to ponderosa pine forests.

Sagebrush or juniper flats to ponderosa pine forests, often on lithosol.

Distribution