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Romneya trichocalyx
Also called Hairy Matilija Poppy
Romneya trichocalyx is a rhizomatous shrub of the poppy family from dry canyons of southern California and Baja California, grown for its large white, crepe-paper flowers. It thrives in full sun and well-drained soil, and is best kept from spreading too far.
Romneya trichocalyx, the bristly Matilija poppy or hairy Matilija poppy, is a species of flowering plant in the poppy family. This poppy is native to San Diego, Ventura, and Santa Barbara counties in California, as well as Baja California, Mexico, where it grows in dry canyons in chaparral and coastal sage scrub plant communities. Like its relative Romneya coulteri, it is used as an ornamental plant, kept for its large, showy flowers.
It is a shrub 1 to 2.5 meters (3 ft 3 in to 8 ft 2 in) tall, growing from a network of rhizomes. The gray-green leaves are each divided into a few lance-shaped lobes. The inflorescence is a large, solitary flower with six white petals each 4–8 cm (1.6–3.1 in) long. At the center of the flower is a cluster of many yellow stamens. The fruit is a bristly capsule 2.5–3.5 cm (0.98–1.38 in) long containing many tiny seeds.
Text excerpted from the Wikipedia article Romneya trichocalyx 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.
