Euphorbia guillauminiana WYSWYG

Origin

Euphorbia guillauminiana is a rare and highly prized succulent endemic to Northwestern Madagascar. It is specifically found in the Sofia region, near Analalava. Named after the French botanist André Guillaumin, it is a protected species listed under CITES Appendix II due to its extremely slow growth rate and limited geographical range in the wild.

Habitat

In its natural environment, this species inhabits dry, deciduous forests and rocky shrublands. It typically grows on basaltic rocks or in well-drained, silty soils at low altitudes (near sea level to 200 meters). The habitat is characterized by a long, harsh dry season and a short monsoon period. The plant has evolved to withstand intense heat and drought by storing moisture in its thick, woody stems.

Description

Euphorbia guillauminiana is often referred to as a "living sculpture" due to its dense, crown-like branching and formidable spination.

• Growth Habit (Cutting): While seed-grown specimens naturally develop a thick, globose basal caudex, cuttings of this species typically grow into a branched, shrubby form. Over time, the base of the cutting will lignify (become woody), creating a rugged, miniature tree-like aesthetic that is highly favored for "Mame" or "Shohin" bonsai styles.

• Stems & Spines: The stems are thick, cylindrical, and grayish-brown. They are densely covered with persistent, sharp, and stiff stipular spines. These spines are arranged in an orderly fashion, giving the branches a "corny" or armored appearance.

• Foliage: During the growing season, a lush cluster of bright green, oval leaves emerges at the very tips of the branches. The contrast between the delicate green leaves and the fierce, woody spines is the plant's most striking feature.

• Flowers (Cyathia): It produces small, attractive yellowish-green flowers (cyathia) that are nestled among the leaves at the branch apices.

• Cultivation: This is a slow-growing species that requires patience. It thrives in full sun to bright indirect light, which helps maintain its compact, "short-leaf" form. It requires a highly mineralized, fast-draining substrate and must be kept warm and dry during its winter dormancy.