Family: Cactaceae
Common Name: Turk's Cap

Originating from tropical coastal areas of northern South America, Mexico and the West Indies, these cactuses are mostly barrel-shaped, with sharp ribs, strong, deep green spines, and a densely spined crown from which the flowers and fruit appear. The small, violet to red flowers are diurnal and open at the crown centre. The pink fruit is generally more visible. All of these cactuses look quite similar when young. Once the bristly head has been produced, they cease to grow in height.

Species

M. bahiensis, a small, free-flowering plant, is the most widely grown species.

M. communis (Synonym: M. intortus) grows to l m (3 ft) in ideal conditions.

M. matanzanus, to 30 cm (12 in), has a bright orange-red head and bright pink to red flowers, followed by pink seed pods.

Cultivation

Grow in a warm greenhouse or conservatory in pots of well-drained cactus compost. Ensure maximum light. Water in moderation during the growing season but apply very little in winter. Too much water will cause plants to rot. Propagate from seed in spring. Germinate at 21°C (70°F).

Climate

Warmest parts of zone 10.