Mineral Wildflower Festival

Technical Name

• Lathyrus nevadensis

Informal Names

• Sierra pea

• Sierra peavine

• Nevada pea

• Purple peavine

Key Characteristics

• Foliage: Features distinct, bright green, pinnately compound leaves usually bearing 4 to 10 broad, oval-shaped leaflets arranged in opposite or near-opposite pairs.

• The Stems: Slender, angled, and slightly sprawling or erect, navigating across rocky ground and forest duff. Unlike many other climbing peas, its tendrils at the leaf tips are often reduced to a small, straight bristle or are completely non-functional.

• The Flowers: Though this specific specimen is mostly showing its lush foliage, it produces small, elegant pea-like blossoms in late spring. The flowers typically range from pinkish-purple to reddish-purple or cream-white with soft pink veining.

Notable Significance

• Nitrogen Fixer: As a proud member of the pea and legume family (Fabaceae), its root system works in tandem with specialized Rhizobium bacteria. This symbiosis allows it to take nitrogen gas from the air and convert it into a nutrient form that naturally fertilizes the lean volcanic soils of the region.

• Wildlife Forage: The tender, protein-rich leaves and seed pods serve as excellent early-summer forage for native mule deer and small mountain mammals.

• Ecosystem Partner: It shares its sunny, gravelly habitats directly with other subalpine survivors—seen here tightly interlaced with Erigeron daisies and low-growing wild buckwheats (Eriogonum).

Locations Found

• Habitat: Thrives beautifully in open conifer woodlands, forest clearings, gravelly mountain flats, and transitioning slopes where it gets a mix of afternoon sun and dappled shade.

• Elevation Range: A quintessential native of the Pacific Northwest and California mountains, it is commonly encountered in the montane zone of the southern Cascades and Sierra Nevada between 3,000 and 7,000 feet, making it a staple on the forest floor around Mineral.