Burke: Eriogonum angulosum vs. Eriogonum compositum

	Eriogonum angulosum	Eriogonum compositum
		arrow-leaf buckwheat, northern buckwheat
Habit		Stout perennial from a woody taproot, the broad crown somewhat shrubby, the several stems and leaves forming a plant to 5 cm. high and broad.
Leaves		Basal, lanceolate to deltoid, more or less cordate-based, white-woolly beneath and green above, on petioles as long to several times as long as the blade.
Flowers		Flowering stems stout and naked, the inflorescence a compound umbel 2-20 cm. broad, with linear bracts at the base of both primary and secondary umbels; involucres 6-10 mm. long, lobed about half their length, the lobes usually reflexed: tepals either creamy-white or lemon-yellow, about 5 mm. long, with a stipe-like base about 1 mm. long.

	Eriogonum angulosum	Eriogonum compositum
Identification notes		The usually large, heart-shaped leaves that are green on top and woolly white beneath will usually identify this species.
Flowering time		May-July
Habitat		Dry, open areas, rocky slopes and cliffs from low elevations nearly to the subalpine.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring chiefly east of the Cascades crest in Washington; Washington to California, east to Idaho. [WildflowerSearch map] [BONAP county map]
Origin		Native
Conservation status		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. strictum, E. thymoides, E. umbellatum, E. vimineum	E. baileyi, E. cernuum, E. codium, 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. strictum, E. thymoides, E. umbellatum, E. vimineum
Subordinate taxa		E. compositum var. compositum, E. compositum var. lancifolium, E. compositum var. leianthum
Web links	Local floras: CA, OR 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: OR, WA Local Web sites: 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 angulosum

Eriogonum compositum

arrow-leaf buckwheat, northern buckwheat

Habit

Stout perennial from a woody taproot, the broad crown somewhat shrubby, the several stems and leaves forming a plant to 5 cm. high and broad.

Leaves

Basal, lanceolate to deltoid, more or less cordate-based, white-woolly beneath and green above, on petioles as long to several times as long as the blade.

Flowers

Flowering stems stout and naked, the inflorescence a compound umbel 2-20 cm. broad, with linear bracts at the base of both primary and secondary umbels;

involucres 6-10 mm. long, lobed about half their length, the lobes usually reflexed: tepals either creamy-white or lemon-yellow, about 5 mm. long, with a stipe-like base about 1 mm. long.