Burke: Erythronium oregonum vs. Erythronium revolutum

	Erythronium oregonum	Erythronium revolutum
	deer's tongue, giant fawn-lily, wild easter lily	coast fawn lily, pink fawn lily, mahogany fawn lily
Habit	Perennial herb from a deep corm; flowering stems to 30 cm tall.	Herbaceous, scapose perennial from a deep-seated corm, the scape 1.5-3 dm. tall.
Leaves	All basal, usually paired; lanceolate; strongly mottled with brown.	Leaves 2, basal, strongly mottled, oblong-lanceolate, 12-18 cm. long, gradually narrowed to a short, broad petiole.
Flowers	Showy white blooms with 6 tepals to 5 cm long; 1-3 at stem tips.	Flowers usually single, occasionally more, nodding; tepals 6, distinct, narrowly lanceolate, deep pink, 3.5-4 cm. long, reflexed; filaments 6, lanceolate, broadened at the base and concealing the ovary; anthers yellow, style slender, stigma lobes 2-3 mm. long.
Fruits	Erect capsules 3-5 cm long.	Capsule narrowly club-shaped, 3-4 cm. long.

	Erythronium oregonum	Erythronium revolutum
Identification notes	The mottled leaves and low-elevation habitat separate this species from E. montanum, which also has white flowers; our other Erythronium species have pink or yellow flowers.
Flowering time	March-May	April-May
Habitat	Prairies, rocky balds, moist woods; at low elevations.	Along river banks and the edge of woods, in open or in moderate shade.
Distribution	Occurring west of the Cascades crest in the Puget Sound lowlands and east in the Columbia River Gorge in Washington; British Columbia to California. [WildflowerSearch map] [BONAP county map]	Occurring west of the Cascades crest in Washington; southern British Columbia to northwest California. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Sensitive in Washington (WANHP)
Sibling taxa	E. grandiflorum, E. idahoense, E. montanum, E. quinaultense, E. revolutum	E. grandiflorum, E. idahoense, E. montanum, E. oregonum, E. quinaultense
Subordinate taxa	E. oregonum ssp. oregonum
Web links	Local floras: BC, 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: BC, 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

Erythronium oregonum

Erythronium revolutum

deer's tongue, giant fawn-lily, wild easter lily

coast fawn lily, pink fawn lily, mahogany fawn lily

Habit

Perennial herb from a deep corm; flowering stems to 30 cm tall.

Herbaceous, scapose perennial from a deep-seated corm, the scape 1.5-3 dm. tall.

Leaves

All basal, usually paired; lanceolate; strongly mottled with brown.

Leaves 2, basal, strongly mottled, oblong-lanceolate, 12-18 cm. long, gradually narrowed to a short, broad petiole.

Flowers

Showy white blooms with 6 tepals to 5 cm long; 1-3 at stem tips.

Flowers usually single, occasionally more, nodding;

tepals 6, distinct, narrowly lanceolate, deep pink, 3.5-4 cm. long, reflexed;

filaments 6, lanceolate, broadened at the base and concealing the ovary;

anthers yellow, style slender, stigma lobes 2-3 mm. long.

Fruits

Erect capsules 3-5 cm long.

Capsule narrowly club-shaped, 3-4 cm. long.

Erythronium oregonum

Erythronium revolutum

Identification notes

The mottled leaves and low-elevation habitat separate this species from E. montanum, which also has white flowers; our other Erythronium species have pink or yellow flowers.

Flowering time

March-May

April-May

Habitat

Prairies, rocky balds, moist woods; at low elevations.

Along river banks and the edge of woods, in open or in moderate shade.

Distribution