Erythronium montanum, the avalanche lily or white avalanche lily, is a member of the lily family native to coastal British Columbia and the alpine and subalpine Olympic and Cascade Ranges of the Pacific Northwest of Washington and Oregon. Erythronium montanum flowers shortly after the snow melts in late spring, in damp subalpine woodlands and alpine meadows, often in extensive patches. Distinguishing characteristics of this species are the oblong-lanceolate unmottled leaves and tepals that are white with a yellow base. Except for flower color, it is similar to Erythronium grandiflorum, which has a range that includes that of E. montanum. Plant at appropriate depth in well-drained soil.

Erythronium montanum, commonly known as the avalanche lily, belongs to the Liliaceae family. This bulbous perennial features two broad leaves and a leafless stem that supports one or more nodding, star-shaped flowers with petals that elegantly curve backward.

https://en.wikipedia.org/wiki/Erythronium_montanum

Erythronium montanum

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Erythronium montanum size, habit and characteristics