Bluntseed Sweetroot

(Osmorhiza depauperata)

Bluntseed Sweetroot (Osmorhiza depauperata)

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Climate Requirements

Precipitation 16" - 33"
High Temp. 66°F - 82°F
Low Temp. 2°F - 18°F

Summary

Osmorhiza depauperata, commonly known as bluntseed sweetroot or blunt-fruited sweet-cicely, is a perennial herb that is native to the understory of temperate forests, particularly those with rich, moist soils in western and North America. It typically grows to a height of up to 31 inches. This plant features compound leaves with blades up to 5 inches wide, which are divided into toothed or deeply lobed leaflets, giving it a delicate, fern-like appearance. The inflorescence consists of a compound umbel of tiny white flowers that bloom at the tip of a stem-like peduncle, followed by distinctive club-shaped, ribbed, and bristly fruits measuring 0 to 1 inch long.

Bluntseed sweetroot is appreciated for its subtle charm in woodland gardens and naturalized areas, where it can provide texture and interest without overwhelming other plantings. It is relatively low-maintenance, requiring minimal care once established in a suitable location. It thrives in partial to full shade and prefers consistently moist, well-drained soils rich in organic matter. While not commonly used for culinary or medicinal purposes, it is a valuable addition to native plant gardens and restoration projects. Gardeners should note that it may self-seed in optimal conditions, but it is not typically aggressive.CC BY-SA 4.0

Plant Description

  • Plant Type: Herb
  • Height: 1-2.5 feet
  • Width: 0.5-1 feet
  • Growth Rate: Moderate
  • Flower Color: White
  • Flowering Season: Spring, Summer
  • Leaf Retention: Deciduous

Growth Requirements

  • Sun: Part Shade, Full Shade
  • Drainage: Medium, Slow

Common Uses

Bee Garden, Bird Garden, Low Maintenance

Natural Habitat

Understory of temperate forests with rich, moist soils

Other Names

Common Names: Bluntseed Sweetroot, Blunt-Fruited Sweet Cicely, Lesser Sweet-Cicely, Blunt-Seed Sweet Cicely

Scientific Names: Osmorhiza depauperata, Osmorhiza chilensis var. cupressimontana, Osmorhiza obtusa, Osmorhiza obtusa var. cupressimontana, Washingtonia obtusa

GBIF Accepted Name: Osmorhiza depauperata