Helianthella quinquenervis, commonly known as the fivenerve helianthella, is a perennial herb native to montane meadows, open coniferous forests, and grassy slopes in the mountains of the western United States and northern Mexico. This includes the Rocky Mountains, the Black Hills, the ranges of the Great Basin, and the northern Sierra Madre. It typically grows to a height of up to 4.9 feet tall, with lanceolate leaves that can reach up to 20 inches long, each featuring 3 or 5 prominent veins, which is a distinctive characteristic of the species. During the flowering season, which occurs from late spring to early fall, fivenerve helianthella produces a single nodding yellow flower head per stem, containing 8-21 bright yellow ray flowers surrounding numerous yellow disc flowers. The flowers are moderately showy and attract a variety of pollinators.

Fivenerve helianthella is valued for its naturalistic appeal in wildflower gardens and meadow plantings, where it contributes to a prairie-style aesthetic. It is relatively low maintenance, requiring minimal care once established. In cultivation, it prefers full sun to partial shade, and it thrives in well-drained soils. It can become drought-tolerant once established. This plant is not commonly associated with serious diseases or pests, but it can be susceptible to root rot in poorly drained soils. Gardeners should always monitor their plants and manage them responsibly to prevent unwanted spread.CC BY-SA 4.0