Western Sweetroot

Osmorhiza occidentalis (Nutt. ex Torr. & A. Gray) Torr. - Carrot family

Size

Mature Height: Up to around 4.0 feet

Plant Type: Forb/herb

Root Depth: 16 inches

Growth Form: Single Crown

Growth Rate: Slow

Features

Flower Color: Yellow

Conspicuous Flowers: Yes

Bloom Time: Spring

Seasonal Growth: Spring and Summer

Evergreen: No

Fall Colors: No

Conditions

Shade Tolerance: Tolerant

Clay Soil Tolerance: Yes

Sandy Soil Tolerance: Yes

Drought Tolerance: High

Flood Tolerance: None

Fire Tolerance: High

Salt Tolerance: Low

Ecosystem Interactions

Pollinators: Larval Host (Moth)

Larval Species depending on Western Sweetroot: Agonopterix rosaciliella, Greya variata

Native Range

  • CAN:  Alberta, British Columbia
  • USA:  California, Colorado, Idaho, Montana, Nevada, Oregon, Utah, Washington, Wyoming
Regional Native Status: L48 (N), CAN (N)

State-level native status is based on data available through Plants of the World Online. Regional Native Status comes from the USDA Plants Database. For more detailed native status information, please refer to BONAP.