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Iris douglasiana
Also called Marin Iris, Pacific Coast Iris, Mountain Iris
Douglas iris is a native wildflower of the Pacific coast from southern Oregon to central California, with purplish-blue flowers in spring. It is grown easily in gardens, and it spreads by rhizomes over time.
Iris douglasiana, the Douglas iris, is a common wildflower of the coastal regions of Northern and Central California and southern Oregon in the United States. It grows mainly at lower elevations and is most common in grasslands near the coast. The plant is commonly cultivated outside of its native range, and has been used by humans for its strong fibers and medicinal properties.
I. douglasiana is frequently cultivated, both within its native range and beyond. Notably, this plant has gained the Royal Horticultural Society's Award of Garden Merit, indicating its suitability for gardening in the United Kingdom. New plants can be propagated from seeds or by separating growth connected by rhizomes. Left unattended, irises will spread in the immediate area through both of these methods. I. douglasiana can become infected by moth larvae of the species Macronoctua onusta (iris borer) and Amphipoea americana var. pacifica.
I. douglasiana can be found in the wild in mainland coastal areas, ranging from southern Oregon to central California. It prefers sunny areas, usually found in grasslands and occasionally forests. It tolerates a range of soil types and can spread quickly after disturbances. It is usually found below 100 meters (330 ft) elevation.
Iris acutiloba subsp. lineolata · Iris acutiloba · Iris adriatica · Iris afghanica · Iris alberti · Iris albomarginata · Iris alexeenkoi · Single Bract Iris · Iris antilibanotica · Stool iris · Iris arenaria · Iris assadiana
Text excerpted from the Wikipedia article Iris douglasiana by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
