Adromischus maculatus (Salm-Dyck) Lem.
Calico Hearts, Chocolate Drop, Spotted Adromischus
Adromischus rhombifolius, Cotyledon alternans, Cotyledon maculata, Cotyledon rhombifolia, Echeveria rhombifolia
This species is native to South Africa. It is restricted to the Langeberg Mountains, from near Worcester to north of George in the Western Cape province, where it grows on sandstone slopes.
Adromischus maculatus is a small, sparsely branched succulent with short, decumbent to erect stems and green, grey-green to greyish brown leaves, usually with dark purple spots. It grows up to 4 inches (10 cm) tall, forming small clusters or mats. Branches are green at first, becoming grey-green with peeling bark. They grow up to 6 inches (15 cm) long and up to 0.5 inches (1.2 cm) in diameter. Leaves are obovate to oblanceolate, sometimes almost orbicular, with horny margins, flat to convex upper surface, and convex lower surface. They are up to 2.8 inches (7 cm) long and 1.4 inches (3.5 cm) wide. The leaves of the young plants are often without spots. Flowers are tubular and appear on an up to 14 inches (35 cm) long thyrse with 1- to 2-flowered cymes in summer. The tube is pale yellowish-green and up to 0.45 inches (1.1 cm) long. Petals are lanceolate-triangular, white or tinged pale pink with mauve margins.
The specific epithet "maculatus (mak-yuh-LAH-tus)" means "stained, spotted" and refers to the spotted leaves. It is the perfect passive participle of the Latin verb "maculo."
USDA hardiness zones 9b to 11b: from 25 °F (−3.9 °C) to 50 °F (+10 °C).
How to Grow and Care
Many species are easy to grow in any free-draining, gritty compost. Their compact habit allows a collection to be maintained in a small space, and they grow well on any sunny window ledge or the top shelf of the greenhouse. Water mostly from spring to fall and let them dry out between waterings. Adromischus tolerates cool, frost-free conditions during the winter if kept dry. It is as well to keep water off the foliage during the winter. Mealybugs and vine weevils can be discouraged with a systemic insecticide.
Adromischus can be propagated from a single leaf, which should be placed against the side of the pot so that the stem end is just touching the compost. Some species drop their leaves easily, and although each leaf will form a new plant, it can be a challenge to grow a large specimen. In other cases, leaves for propagation must be carefully detached with a sharp knife.
See more at How to Grow and Care for Adromischus.
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