deltoidi

Deltoidi is a genus of small, spiny shrubs belonging to the family Euphorbiaceae. These plants are native to Madagascar and are known for their succulent stems and sharp, thorn-like structures. The genus name "deltoidi" refers to the triangular shape of the leaves when present, though in many species the leaves are ephemeral and fall off quickly.

Deltoidi species are adapted to arid and semi-arid environments, exhibiting drought tolerance. Their stems are typically green and photosynthetic, serving as the primary site for energy production. The spines, which are modified stipules, provide protection from herbivores. The flowers are small and often inconspicuous, usually found in cymes or clusters. Following pollination, the plants produce small capsules containing seeds.

Reproduction in Deltoidi can occur both sexually through seeds and asexually through vegetative propagation. The specific habitat preferences vary among species, but they are generally found in rocky outcrops, sandy soils, and dry scrublands. Due to their unique morphology and restricted distribution, some Deltoidi species are considered rare and may be of conservation concern. Further research is ongoing to understand their ecological roles and evolutionary relationships within the Euphorbiaceae family.