Erythronium montanum, commonly known as Avalanche Lily or White Avalanche Lily, is a perennial herb that is deciduous in nature. It is native to the alpine and subalpine zones of the Pacific Northwest, specifically coastal British Columbia and the Olympic and Cascade Ranges of Washington and Oregon. This plant typically grows to a height of 10-20 centimeters and is characterized by its oblong-lanceolate unmottled leaves and striking white tepals with a yellow base that bloom in late spring, shortly after the snow melts. The flowers are showy and attract pollinators, blooming from April to July depending on elevation and snowmelt timing.

Avalanche Lily is appreciated for its delicate, nodding flowers that can brighten up rock gardens and woodland settings. It is often used in native plant gardens and restoration projects within its range. In cultivation, Erythronium montanum requires moist, well-drained soil rich in organic matter and thrives in part shade conditions, mimicking its native damp subalpine woodlands and alpine meadows. It is generally low-maintenance once established but may require protection from slugs and snails. This species is not known for aggressive roots or significant disease problems, but it can be sensitive to drought and excessive heat.CC BY-SA 4.0