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Bransford, W.D. and Dolphia
Iris hartwegii Baker
Rainbow iris, Sierra iris
USDA Symbol: IRHA
USDA Native Status: L48 (N)
This variable species usually has narrow, pale-green leaves and light-yellow flowers with golden or purple veins. The flower stem in slender, from 6 in.-1 ft. tall, and bears 1-2 flowers.
A member of the iris family (family Iridaceae) which consists of herbs growing from rhizomes, bulbs, or corms, with narrow basal leaves and showy clusters at the tips of long stalks. There are about 60 genera and 1,500 species, distributed in temperate and tropical regions. Among them, Iris, Freesia, Gladiolus, Bugle Lily, and Montbretia are popular ornamentals. Saffron dye is obtained from Crocus, and essence of violets, used in perfumes, is extracted from the rhizomes of Iris.
Plant CharacteristicsDuration: Perennial Habit: Herb Fruit: Size Class:
Bloom InformationBloom Color: Yellow
Bloom Time: May , Jun
DistributionUSA: CA Native Distribution:
W. base of Sierras from Butte to Kern Cos., CA Native Habitat:
Wooded slopes from 2000-6000 ft.
Growing ConditionsLight Requirement: Shade
Soil Moisture: Moist
Soil Description: Moist, humus-rich soil.
Conditions Comments: Hybridizes readily with I. macrosiphon.
BenefitConspicuous Flowers: yes
PropagationSeed Collection: Easily collected from the large capsules.
Seed Treatment: Not Available
Commercially Avail: yes
National Wetland Indicator Status
|Status:|| FACU || OBL |
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
From the National Suppliers Directory
According to the inventory provided by Associate Suppliers, this plant is available at the following locations:
Oregon Native Plant Nursery
- Woodburn, OR
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Santa Barbara Botanic Garden
- Santa Barbara, CANative Seed Network
- Corvallis, OR
Record Last Modified: 2007-08-19
Research By: TWC Staff