Burke: Eriogonum maculatum vs. Eriogonum flavum

	Eriogonum maculatum	Eriogonum flavum
	spotted buckwheat	yellow buckwheat
Habit		Tufted perennial with several woody branches coming from a stout taproot and covered with dead leaves, and several simple stems to 2 dm. tall top with a compact, multi-rayed umbel and ball-shaped flower clusters.
Leaves		Basal, closely crowded, usually more or less gray-woolly, especially below, linear to narrowly oblanceolate, 3-7 cm. long with a petiole about the same length.
Flowers		Flowering stems leafless, 5-20 cm. long; inflorescence a simple umbel, rays up to 3 cm. long, subtended by 4-6 somewhat leafy bracts; involucre covered with soft hairs, cone-shaped, 4-7 mm. long with 4-5 shallow lobes; tepals 4-6 mm. long, usually pale to deep yellow but sometimes rose-tinged, covered with soft, silky hairs, and with a short, stipitate base.

	Eriogonum maculatum	Eriogonum flavum
Flowering time	May-June	June-August
Habitat	Sand, gravel or clay slopes and flats, grassland, and shrub-steppe.	Open knolls in grasslands to alpine ridges and scree.
Distribution	Collected once (1884) in Yakima County in Washington and now considered extirpated; southeastern Oregon to southwestern Idaho, south to Baja California, Mexioca and east to New Mexico. [WildflowerSearch map] [BONAP county map]	Occurring east of the Cascades crest in southeastern Washington; Alaska to northeastern Oregon, east to the northern Great Plains. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Presumed extirpated in Washington (WANHP)	Not of concern
Sibling taxa	E. baileyi, E. cernuum, E. codium, E. compositum, E. douglasii, E. elatum, E. flavum, E. heracleoides, E. marifolium, E. microtheca, E. niveum, E. nudum, E. ovalifolium, E. pyrolifolium, E. sphaerocephalum, E. strictum, E. thymoides, E. umbellatum, E. vimineum	E. baileyi, E. cernuum, E. codium, E. compositum, E. douglasii, E. elatum, 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. flavum var. piperi
Web links	Local floras: CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, OR, WA Local Web sites: Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Tufted perennial with several woody branches coming from a stout taproot and covered with dead leaves, and several simple stems to 2 dm. tall top with a compact, multi-rayed umbel and ball-shaped flower clusters.

Leaves

Basal, closely crowded, usually more or less gray-woolly, especially below, linear to narrowly oblanceolate, 3-7 cm. long with a petiole about the same length.

Flowers

Flowering stems leafless, 5-20 cm. long; inflorescence a simple umbel, rays up to 3 cm. long, subtended by 4-6 somewhat leafy bracts;

involucre covered with soft hairs, cone-shaped, 4-7 mm. long with 4-5 shallow lobes;

tepals 4-6 mm. long, usually pale to deep yellow but sometimes rose-tinged, covered with soft, silky hairs, and with a short, stipitate base.

Eriogonum maculatum

Eriogonum flavum

Flowering time

May-June

June-August

Habitat

Sand, gravel or clay slopes and flats, grassland, and shrub-steppe.

Open knolls in grasslands to alpine ridges and scree.

Distribution

Collected once (1884) in Yakima County in Washington and now considered extirpated; southeastern Oregon to southwestern Idaho, south to Baja California, Mexioca and east to New Mexico.

[WildflowerSearch map]

[BONAP county map]