Lewisia longipetala, commonly known as Truckee lewisia or long-petalled lewisia, is a rare perennial herb endemic to the high-elevation rocky outcrops and talus slopes of the Sierra Nevada in California, particularly near Lake Tahoe. It is adapted to subalpine and alpine climates, often found in moist, rocky habitats with persistent snow patches. This plant typically forms a basal rosette of fleshy, evergreen leaves and produces showy pinkish to white flowers with long petals, each up to 1 inch long, and tipped with distinctive resin glands. The flowering season occurs in late spring to early summer, depending on snowmelt timing.

Truckee lewisia is valued for its striking flowers and resilience to cold, making it a choice plant for rock gardens, alpine collections, and as a ground cover in suitable climates. It requires excellent drainage and prefers a gritty, rocky substrate, mimicking its native talus habitats. While it can tolerate high moisture levels during the snowmelt period, it is important to avoid waterlogged conditions during the growing season. Full sun to part shade is ideal for this species. In cultivation, it is also appreciated for its low maintenance needs and its ability to withstand cold temperatures. However, it can be susceptible to root rot if drainage is inadequate.CC BY-SA 4.0