Queen'S Cup
Clintonia uniflora
Last reviewed: June 2026
Queen'S Cup (Clintonia uniflora) is not on the ASPCA Animal Poison Control Center toxic plant list for dogs or cats (aspca.org (opens in new tab), last reviewed 2026-05-21). If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
part shade
Water
medium
Size
4"–12" H × 6"–12" W
Bloom
May, Jun, Jul
Native to
CA, ID, MT, OR and 1 more states
Pollinators
bees, beetles
Browse plants for this ecoregion
Clintonia uniflora is a charming woodland perennial native to mountain forests, featuring glossy green leaves and delicate white star-shaped flowers. This low-growing plant thrives in shaded areas with consistent moisture, making it ideal for woodland gardens and naturalized settings. The flowers bloom from late spring through summer, followed by attractive blue berries.
In an HOA neighborhood
Queen'S Cup takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Appears too wild and woodland-like for formal landscapes
- May go dormant or look sparse outside ideal conditions
- Unfamiliar appearance may be seen as weedy by HOA boards
Wildlife value
The flowers attract native bees and beetles during the spring and summer blooming period. The berries provide food for small wildlife and birds in late summer.
Common questions
- How much sun does Queen'S Cup need?
- Queen'S Cup grows best in part shade conditions.
- When does Queen'S Cup bloom?
- Queen'S Cup blooms in May, June, and July.
- Where is Queen'S Cup native?
- Queen'S Cup (Clintonia uniflora) is native to CA, ID, MT, OR and 1 more states, per the USDA PLANTS Database and regional native plant society lists.
- Is Queen'S Cup toxic to dogs?
- Queen'S Cup is not on the ASPCA Animal Poison Control Center toxic plant list for dogs (aspca.org).
- Is Queen'S Cup toxic to cats?
- Queen'S Cup is not on the ASPCA Animal Poison Control Center toxic plant list for cats (aspca.org).
- What pollinators does Queen'S Cup attract?
- Queen'S Cup draws bees and beetles.
- Is Queen'S Cup HOA-friendly?
- Queen'S Cup takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Ready to grow Queen'S Cup? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz