Adromischus cristatus var. clavifolius (Haw.) Toelken
Adromischus clavifolius, Cotyledon clavifolia
Adromischus cristatus var. clavifolius is a small succulent that forms a dense clump of short stems with long, narrow leaves with horny, usually undulate apical margins. The stems are up to 1.6 inches (4 cm) long, often much branched and moderately covered with aerial roots. Leaves are very variable in shape and size. They are light green to grey-green, sometimes reddish at the tips, and usually with few glandular hairs, at least when young.
The flowers are up to 0.5 inches (1.2 cm) long, with a grey-green corolla tube and white to pinkish petals, and appear on up to 12 inches (30 cm) long stalk in mid-summer. The inflorescence and flowers are usually hairy.
Adromischus cristatus var. clavifolius is native to South Africa. It occurs between Alexandria, Grahamstown, and East London in the Eastern Cape province, usually growing on shallow soil on rock outcrops.
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.
Learn more at How to Grow and Care for Adromischus.
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