Index / Search / Olsynium douglasii var. douglasii
§1 Plant
Olsynium douglasii (A. Dietr.) E.P. Bicknell var. douglasii
vernacular Douglas' grasswidow — variety · Iridaceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Perennial
- Group
- Monocot
- Family
- Iridaceae Juss.
- Genus
- Olsynium
§2a
Native status, by region
- CAN Canada Native
- L48 Lower 48 States Native
§2b
County-level range
· 28 counties across 3 states/territories§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- Medium
- Shade
- High
- Moisture use
- Medium
- Fire
- Medium
- Salinity
- None
- Anaerobic
- None
- CaCO₃
- Low
- Hedging
- None
§3b
Climate & soil
- Cold tolerance
- -23 °F minimum
- Frost-free days
- 120 min.
- Precipitation
- 14–20 in/yr
- pH range
- 6–7.8
- Root depth
- 8 in min.
- Fertility need
- Medium
- Soil texture
- coarse, medium
§3c
Form & growth
- Growth form
- Bunch
- Growth rate
- Moderate
- Lifespan
- Moderate
- Mature height
- 1 ft
- Foliage texture
- Fine
- Foliage colour
- Gray-Green
- Porosity (summer)
- Porous
- Porosity (winter)
- Porous
- Flower colour
- Red
- Fruit colour
- Brown
- Fire resistant
- No
- N fixation
- None
- Toxicity
- None
§3d
Reproduction
- Bloom period
- Early Spring
- Seed abundance
- Low
- Seed begins
- Spring
- Seed ends
- Summer
- Spread rate
- None
- Stratify
- No
- Seeds / lb
- 500,000
- Propagation
- seed, bare root, bulb
§3e
Use & availability
- Commercial availability
- Contracting Only
- Nursery stock
- No
- Browse palatability
- Low
- Graze palatability
- Low
- Palatable, human
- No
- Lumber
- No
- Christmas tree
- No
§4Counties, by state
Recorded in 28 counties across 3 states/territories.
California view state ↗ 4 N ▾
Oregon view state ↗ 14 N ▾
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/OLDOD ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/7228017 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T20:46:58Z