Iris missouriensis (Rocky Mountain iris)
Also called Western blue flag. Native perennial evergreen forb spreading by tuberous rhizomes with showy large pale blue to blue-violet flowers and dark violet veins, blooming May to September. Occurs in wetlands and riparian areas of streambanks, moist meadows and forest openings; up to 11,500 ft. elevation. Use for restoration or in wet to saturated landscaping. Attracts insects and hummingbirds.
DISTRIBUTION / ADAPTATION
INFORMATION & ATTRIBUTES
Family: Iridaceae
Duration: Perennial
Growth Habit: Forb/herb
Native Status: Native
Growth Form: Colonizing
Mature Height: 12 in.
Bloom Color: Purple
Bloom Period: Spring
Annual Precipitation: 24-35 in.
Drought Tolerance: Low
Shade Tolerance: Intermediate
Elevation:
Wetland Indicator Status: FACW
Fire Resistance: No
Fire Tolerance: High
Nitrogen fixation:
SOIL ADAPTATION
Coarse Texture: Yes
Medium Texture: Yes
Fine Texture: Yes
Salinity Tolerance: None
CaCO3 Tolerance: High
pH Range: 7.0-8.5
SEEDING NOTES
Seeds per Pound: 19,900
Seeding Rate: 2-3 PLS lbs/acre
Season:
Days to Germination:
VARIETIES & LOCAL ACCESSIONS
None