Astrophytum Myriostigma Tricostatum

A Euphorbia parvimedusae hybrid is a cultivated succulent variety developed by crossing Euphorbia parvimedusae—a rare and unusual species from South Africa—with another Euphorbia species, often to enhance certain traits such as size, growth habit, or ease of cultivation. These hybrids typically retain the unique, medusoid appearance of the parent species, characterized by a central caudex (swollen stem base) from which numerous cylindrical arms or branches radiate, resembling a sea anemone or the mythological head of Medusa.

Depending on the hybrid cross, the plant may show variations in:

• Branch density – more compact or sprawling arms

• Caudex shape – larger, more prominent, or more textured

• Color – shades of green, grey-green, or even reddish tones

• Spines – some hybrids may have more or fewer spines

Like most Euphorbias, these hybrids exude a white, toxic latex when damaged and should be handled with care. They prefer well-draining soil, minimal watering, and bright light—making them excellent candidates for collectors or enthusiasts interested in rare succulents.

Gymnocalycium mihanovichii is a small, globular cactus species native to the semi-arid regions of Paraguay and parts of northern Argentina. It belongs to the Cactaceae family and is part of a genus known for its relatively easy care, compact size, and attractive flowers.

This species typically grows to about 5–6 cm in height and 4–5 cm in diameter. It has a flattened, spherical body with 8–14 broad ribs and a grayish-green to dark green color. The stem is often slightly wrinkled and marked by low tubercles. It bears short, slightly curved spines that vary in number but are generally not aggressive, making the plant user-friendly for handling.

Flowers appear from the crown of the plant during late spring to summer. They are funnel-shaped and range in color from pale pink to light purple, occasionally white. The blooms are relatively large compared to the size of the plant and open during the day.

This species prefers well-draining cactus soil, moderate watering (allowing the soil to dry completely between waterings), and bright, indirect sunlight. Direct sun in hot climates can cause sunburn on the plant’s surface. It tolerates mild cold but should be protected from frost.

In cultivation, Gymnocalycium mihanovichii is often the parent of colorful grafted hybrids like the “Moon Cactus” (var. friedrichii), which lacks chlorophyll and must be grafted onto a host plant to survive.