Dudleya cymosa subsp. agourensis
Agoura hills dudleya, Agoura Hills Dudleya
(c) Ken-ichi Ueda, some rights reserved (CC BY) · licence
Family: Crassulaceae · Type: Herb · Native
Conservation status: CNPS 1B.2 · Threatened
Dudleya cymosa subsp. agourensis (Agoura hills dudleya) is a native California herb in the Crassulaceae family, recognized by volcanic habitat and gray-purple color diagnostic.
Agoura hills dudleya is a rare (CNPS 1B.2) California native perennial found in the southern Santa Monica Mountains in open, rocky volcanic slopes at elevations below 460 meters. Flowering from May to June, this succulent produces bright yellow flowers in clusters emerging from rosettes 5 to 10 centimeters wide. Growing with clustered rosettes and short stems generally 1 to 2 centimeters wide, it forms dense, compact groupings. Its leaves are 3 to 10 centimeters long, oblong to lanceolate, with a distinctive gray-purple coloration and occasionally twisted appearance when dry. The plant's base may have a subtle purple-red tinge, adding to its distinctive rocky slope adaptation.
Identification and appearance
Key characters: 10 sympatric species, volcanic habitat and gray-purple color diagnostic
Habitat and range
Habitat: Open, rocky volcanic slopes
Elevation: < 460 m
Bloom period
Dudleya cymosa subsp. agourensis blooms May-Jun.
Conservation status
CNPS 1B.2 · Threatened
How to tell it apart
vs Curio: Dudleya has thick succulent leaves in rosettes; Curio has thin, cylindrical or string-like leaves.; vs Echeveria: Dudleya flower stalks emerge from leaf axils; Echeveria flowers emerge from rosette center.; vs Sedum: Dudleya forms distinct basal rosettes; Sedum grows as spreading mats or upright stems without rosettes.; vs Aeonium: Dudleya has smooth leaf edges; Aeonium has tiny hairs along leaf margins.; vs Carpobrotus: Dudleya has rosettes under 30cm; Carpobrotus has sprawling succulent stems over 1m long.
Frequently asked questions
Is Dudleya cymosa subsp. agourensis native to California?
Yes. Dudleya cymosa subsp. agourensis is native to California (recorded as native).
When does Dudleya cymosa subsp. agourensis bloom?
Dudleya cymosa subsp. agourensis blooms May-Jun.
What plant family does Dudleya cymosa subsp. agourensis belong to?
Dudleya cymosa subsp. agourensis is in the Crassulaceae family, genus Dudleya.
Is Dudleya cymosa subsp. agourensis rare or endangered?
Dudleya cymosa subsp. agourensis carries California Rare Plant Rank 1B.2, state rank S1.
What habitat does Dudleya cymosa subsp. agourensis grow in?
Dudleya cymosa subsp. agourensis grows in Open, rocky volcanic slopes.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CalPhotos · CDFW CNDDB
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.