Dudleya pulverulenta aka Chalk Dudleya

Dudleya pulverulenta is a succulent in the stonecrop family. Gardeners call it chalk dudleya or chalk lettuce. Kew places its native range in southern California and northern Baja California. It grows on rocky cliffs, canyon walls, and steep banks. Its habitats include coastal sage scrub and chaparral. Wild plants grow from sea level to 4,920 feet [1,500 metres]. Winter rain and coastal fog supply water in these dry sites.

The plant forms one large rosette rather than a clump. Rosettes span about 0.8–2 feet [0.25–0.6 metres]. Each holds roughly 30–80 thick leaves with pointed tips. A white wax coat gives the leaves their pale look. This coat also covers stems and parts of the flowers. Touching the leaves can leave lasting marks on this surface. The thick stem tends to lean as it grows. Old, dry leaves cover it, and it seldom branches.

Flower stalks rise above the leaves from late spring onward. They reach about 1–3.3 feet [0.3–1 metre]. Some reach 4.9 feet [1.5 metres], beyond the usual range. The stalks branch and bear smaller leaves that turn red. Red, bell-shaped flowers bloom from May through August. They hang down or tilt outward, then turn upright. Hummingbirds visit the flowers for their rich nectar. The fruit consists of upright follicles with slender brown seeds.

Chalk dudleya grows slowly and needs care with drainage. It suits garden beds where winters stay mild and summers dry. It also grows in pots, where plants stay smaller. Use sandy or gravelly soil that drains well. A porous potting mix serves the same purpose in containers. The species tolerates summer heat and drought and prefers cool, moist winters. PFAF lists USDA zones 7–11 for this species. Its pale leaves suit rock gardens and dry native plantings.

PFAF lists the leaves as edible, with limited food value. It advises against casual gathering because of conservation concerns. Its records also describe past uses by Indigenous groups. People applied fleshy leaves to corns and calluses. They used boiled root preparations as an asthma remedy. These records describe traditional use, not proven medical effects. The supplied evidence does not establish toxicity or pet safety. It also gives no species-specific account of pests or diseases.