How adaptable is the Bishop's Cap Cactus (Astrophytum myriostigma)? A complete guide

Morphological characteristics of the Bishop's Cap Cactus

Astrophytum genus. The plant is spherical, with older plants becoming slender and cylindrical. The body is 10-20 cm in diameter, with 3-9 distinct ribs, mostly 5 ribs. The areoles on the ribs have no spines, but bear brownish wool. The body is grayish-white, densely covered with white stellate hairs or small scales. The flowers grow from the areoles at the top of the body, funnel-shaped, yellow or with a red center. The three-ribbed "Triangular Bishop's Cap Cactus" is relatively rare and prized, and the four-ribbed "Four-angled Bishop's Cap Cactus," also called Square Jade, has four broad ribs that are evenly symmetrical and is also quite interesting.

The plant is solitary, initially spherical, later growing into a cylindrical shape, 16-18 cm in diameter.

Up to 50-60 cm tall, with 5 ribs bearing relatively high ridges, the body taking on a symmetrical five-pointed star shape; large plants can increase to 6-8 ribs. The grayish-blue-green body is densely covered with tiny white star dots. From spring to summer, funnel-shaped orange-yellow flowers are borne at the top, 4-5 cm in flower diameter.

Growing environment of the Bishop's Cap Cactus

Native to Mexico. It prefers a cool, sunny environment, and needs plenty of light in summer as well. It requires well-drained, sandy soil rich in lime.

Variety classification of the Bishop's Cap Cactus

The Bishop's Cap Cactus is a famous representative species of the Astrophytum genus in the Cactaceae family, native to Texas in the United States. The Bishop's Cap Cactus can undergo a certain degree of intergeneric hybridization, and the original species has many variant types. Some countries have done a great deal of work in breeding these two varieties, such as Japan's selected "Super Kabuto, Yamamoto Kabuto, Turtle Shell Kabuto, Garden Kabuto" as well as "Onzuka Bishop's Cap Cactus, Red-leaf Bishop's Cap Cactus" and so on, and China's selected "Kabuto Brocade, Wall Square Jade" and others.

Main value of the Bishop's Cap Cactus

From this it can be seen that its horticultural value is relatively high, and its ornamental value is equally high; it is a treasure that botanical gardens and succulent plant enthusiasts are keen to collect. Because these plants have a very low propagation rate and relatively great variability, it is very difficult to preserve the various horticultural varieties. Using tissue culture methods may be an effective way to solve the propagation and germplasm preservation of the various horticultural varieties of Astrophytum and the Bishop's Cap Cactus, and it also has significance for the protection of endangered plants. No report of successful tissue culture of this plant has been seen in China or abroad.