Delosperma Has Obvious Seeds

Introduction

Delosperma is a genus of succulent plants native mainly to southern Africa. The name comes from Greek: delos, meaning “obvious,” and sperma, meaning “seed”—a reference to how the seeds become visible when the fruit opens.

The Details

In dry weather, the seed capsule opens and folds back like an upside-down umbrella. The seeds sit on top of thin membranes, so they are clearly visible when conditions are dry. When moisture returns, the capsule can close again. This dry-open/wet-closed behavior aids short-distance dispersal and protects the seeds during rain.

There are more than 100 species of Delosperma. Many are easy in cultivation if given fast-draining soil and careful watering. Flowers can be pink, lavender, yellow, white, or orange, with many narrow petals and numerous stamens typical of the Aizoaceae (formerly Mesembryanthemaceae). Growth forms vary: many species form low mats that run over gravel and rock, some are used as groundcovers, some stay compact for rock gardens, and a few become small shrubs.

A handful of species tolerate significant cold; for example, Delosperma cooperi can handle about −10 °F when drainage is excellent. Overall, these plants prefer bright light, lean soils, and periodic drying between waterings. In warm, arid areas with good drainage, they flower well and maintain tight, tidy growth.