Dudleya cymosa (Lem.) Britton & Rose
Canyon Liveforever / Cymose Dudleya
Dudleya cymosa, Canyon Liveforever, is one of the most variable and polymorphic Dudleya in the genus, with multiple recognized subspecies spanning from Pacific coastal cliffs to interior slopes of the California Sierra Nevada. It is the species with the widest distribution range in the genus in California, colonizing from sea level to over 3,000 m elevation.
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© Stan Shebs
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Overview
| Category | Classification |
|---|---|
| Family | Crassulaceae |
| Genus | Dudleya |
| Growth Habit | Compact rosette 5–20 cm diameter depending on subspecies; short to moderate caudex; produces offsets more frequently than other large Dudleya species. |
| Conservation Status | The species is generally Least Concern; several subspecies (ssp. agourensis, ssp. marcescens) have pinpoint distributions and are listed as Endangered (EN) by the CNPS (California Native Plant Society). |
| pH Target | 5.5 – 7.5 |
| Type | Highly variable — from granite to gabbro, sandstone to serpentine; always well-drained; pH 5.5–7.5. |
Origin & Habitat
Morphology
Spatulate to lanceolate leaves 3–15 cm long (highly variable by subspecies); grey-green to intense green with moderate to sparse farina; acute to obtuse apex; entire margin; some mountain subspecies have narrower, elongated leaves.
ecoShort caudex, occasionally branched; mountain plants have more robust, buried caudices than coastal ecotypes.
ecoInflorescences 15–40 cm; tubular flowers bright red to orange-red, 1–1.5 cm; April to July flowering depending on elevation.
ecoHighly variable root system: fibrous-shallow in coastal rock ecotypes; deeper and more branched in Sierra Nevada granite subspecies.
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Requirements
Soil & Substrate
Type
Highly variable — from granite to gabbro, sandstone to serpentine; always well-drained; pH 5.5–7.5.
groups Beneficial Associations
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Propagation Strategy
- 1 Collect ripe seeds in summer; store dry and cool until autumn.
- 2 Surface-sow on mineral substrate (sand + pumice), uncovered.
- 3 Maintain at 15–20 °C with moderate capillary moisture.
- 4 Germination occurs in 2–4 weeks; leave seedlings undisturbed through the first winter.
- 5 Transplant in spring once roots are established.
- 1 Detach basal offsets during autumn–spring with a sterile blade.
- 2 Allow to callus for 5–7 days in a well-aerated spot.
- 3 Plant in draining mineral mix; water lightly after 1 week.
- 1 Select healthy mature basal leaves; remove with a clean lever motion to preserve the base.
- 2 Allow to callus for 3–5 days lying horizontally in a dry, dimly lit spot.
- 3 Place on moist mineral substrate (not buried); ensure base contacts the substrate.
- 4 Maintain at 18–22 °C with indirect light; mist lightly every 4–5 days.
- 5 Tiny roots and emerging rosette visible in 6–10 weeks; do not transplant until the rosette is ≥ 1 cm.
D. cymosa is morphologically very variable; respect the Mediterranean cycle (water autumn–spring, dry in summer).
Watering in summer: even though it tolerates slightly more, excess moisture in this season still causes rot.
Every 3–4 years in autumn, coinciding with the start of active growth.
Fertilizer diluted to 25% (low nitrogen, e.g. 5-10-10) in autumn and mid-winter. No fertilization in summer.
Uses & Applications
Precautions / Toxicity
No documented toxicity for humans or wildlife; historically consumed occasionally by California indigenous peoples.
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"The polymorphism of D. cymosa is so extreme that some taxonomists have proposed up to 12 valid subspecies; subspecies agourensis is restricted to the Santa Monica Mountains National Recreation Area in Los Angeles, with a single known population of fewer than 300 individuals, making it one of the plants with the fewest wild individuals in California."
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Scientific Integrity
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Sources
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Discussion
Disclaimer
This species record is provided for educational and informational purposes only. Jardín Roca Negra does not guarantee the accuracy or completeness of the data. Content is community-curated and may be subject to revision; it should not replace advice from a qualified botanist. This species may be toxic, invasive, or subject to legal restrictions — verify before handling or cultivating. Jardín Roca Negra accepts no liability for any harm arising from reliance on this information. Images are reproduced under Creative Commons or equivalent free licenses; credits are noted below each image.