Index / Search / Iris missouriensis
§1 Plant
Iris missouriensis Nutt.
vernacular Rocky Mountain iris — species · Iridaceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Perennial
- Group
- Monocot
- Family
- Iridaceae Juss.
- Genus
- Iris
§2a
Native status, by region
- CAN Canada Native
- L48 Lower 48 States Native
§2b
County-level range
· 13 counties across 6 states/territories§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- Low
- Shade
- Medium
- Moisture use
- High
- Fire
- High
- Salinity
- None
- Anaerobic
- High
- CaCO₃
- High
- Hedging
- Low
§3b
Climate & soil
- Cold tolerance
- -28 °F minimum
- Frost-free days
- 115 min.
- Precipitation
- 24–35 in/yr
- pH range
- 7–8.5
- Root depth
- 6 in min.
- Fertility need
- Low
- Soil texture
- coarse, medium, fine
§3c
Form & growth
- Growth form
- Colonizing
- Growth rate
- Rapid
- Lifespan
- Short
- Mature height
- 1 ft
- Foliage texture
- Medium
- Foliage colour
- Green
- Porosity (summer)
- Porous
- Porosity (winter)
- Porous
- Flower colour
- Purple
- Fruit colour
- Black
- Fire resistant
- No
- N fixation
- None
- Toxicity
- None
§3d
Reproduction
- Bloom period
- Spring
- Seed abundance
- Medium
- Seed begins
- Summer
- Seed ends
- Spring
- Spread rate
- Moderate
- Stratify
- No
- Seeds / lb
- 19,958
- Propagation
- seed, bare root, bulb, corm
§3e
Use & availability
- Commercial availability
- Routinely Available
- Nursery stock
- No
- Browse palatability
- Low
- Graze palatability
- Low
- Palatable, human
- No
- Protein potential
- Low
- Lumber
- No
- Christmas tree
- No
§4Counties, by state
Recorded in 13 counties across 6 states/territories.
Arizona view state ↗ 5 N ▾
Minnesota view state ↗ 1 N ▾
Montana view state ↗ 1 N ▾
Nebraska view state ↗ 1 N ▾
North Dakota view state ↗ 2 N ▾
South Dakota view state ↗ 3 N ▾
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/IRMI ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/5298923 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T08:39:52Z