Image of Osmorhiza longistylis
Source: Soug McGrady
image of Flowering plant
Osmorhiza longistylis
Smooth Sweet Cicely
Osmorhize à long style

Obsolete Names

anise-root
long-style sweet cicely
long-style sweetroot
No seeds available for this plant.
We currently accept seeds for this plant
Bloom colour: White Bloom period: May - Jun
Max Height: 3.0 feet
Max Width: 2.0 feet (spreads by rhizome)
Light condition:
Part shade More than 2 or 3 hours but less than 6 hours of direct sun a day
Soil conditions:
Moisture medium Tolerates medium soil condition
Lifespan: Perennial plants that will that come back year after year
Gardener Experience:
does not spread Does not spread uncontrollably
plant self seeding Self-seeding
Landscape uses: No landscape information available.
Ecological Benefits: No ecological benefits information available.
Tolerates:
Deer Resistant Deer resistant
rabbit resistant Rabbit resistant
transplantation Tolerant Tolerates transplantation
Special Features and Considerations:

Plant Location

Native to Ottawa region: Yes

Distribution according to VASCAN

Distribution: Osmorhiza longistylis
Ephemeral Native Introduced Excluded Extirpated Doubtful Absent
View taxonomy on Canadensys

View on iNaturalist

Thrives in Ecozones

  • Atlantic Maritime
  • Boreal Plains
  • Montane Cordillera
  • Boreal Shield
  • Mixed Wood Plains

Ecological Benefits

Butterflies Supported by Osmorhiza longistylis

No butterfly data available for this plant.

Specialized Bees Supported by Osmorhiza longistylis

No bee data available for this plant.

Plants that grow in similar conditions, that bloom at the same time.

Complementary Plants

Substitute For Non-Native Plants

  • Sorbaria sorbifolia (False spirea)
  • Hydrangea (Hydrangea)
  • Aegopodium podagraria (Goutweed)

Sowing Information

Download Sowing Label (PDF)
  • Sowing depth: Surface sow
  • Sow by February
  • Stratification duration: 60 days
  • Self-seeding

Harvesting and Seed Sharing

  • Harvest start month: July
  • Harvesting indicator: Seeds easily fall off when you gently pull them off
  • Harvesting mean: Use hand to detach from main stem
  • Seed viability test: No test needed before donating
  • Packaging measure: 1 rounded 1/8 teaspoon
  • Seed storage: Air dry in paper bag or open container, for a few days until crisp, shaking seeds to move them once in a while to prevent molding
  • At least one cultivar: No, you can donate without knowing the source as there are only straight species
  • No harvesting video available at this time.

Toxicity Notes

Inadequate information on toxicity found.