Fat plants

Bishop's cap - Astrophytum myriostigma


plant native to northern Mexico, globular in shape, which tends to lengthen over time. The name astrophytum
derives from the Greek astron (star) and phyton (plant) and refers to the shape of the plant seen from above. It has 4-8 ribs, quite evident, in some varieties it tends to develop in a spiral; often the stem is covered with very fine white patches of bloom. There are 6 species of Astrophytum in addition to numerous varieties and hybrids, in general the stem is greyish-green in color, and has thorns of large size, gathered in small roundish areoles. The flowers are a lot
beautiful and bloom in groups, or isolated, on the top of the plant. Their color is yellow and some varieties have a red center. They last 4-5 days, although the plant can also flower all summer long.


they are grown in a sunny, or partially shaded place, repairing the plants during the hottest hours of the day in areas with very hot summers; they can withstand temperatures close to zero, but only if in a completely dry place, so in winter they shelter in the apartment or in a cold greenhouse.


from March to October water the soil, but only when it is perfectly dry; during the cold season water only the specimens grown at home, sporadically moistening the soil once every 30-45 days. During the vegetative season, provide fertilizer for succulent plants, every 20-30 days.


cultivate in a succulent substratum, consisting of a part of peat, a part of river sand and a part of lapillus or pozzolan; every 3-4 years repot into containers a few centimeters wider than the original vase.


it happens by seed, since it is difficult to find them Astrophytums produce basal shoots.

Pests and diseases

they fear the attack of aphids, mites and cochineal; poor drainage of the soil or excessive watering can favor the development of root rot.


Originally from Mexico it is 3 to 4 cm high and has a diameter of about 7 cm. The stem is light green, has a slightly flattened ball shape, with 8 broad and rounded ribs. The flowers, about 3 cm long, open in summer, are yellow and tinged with red in the center. This species never produces shoots.


Originally from Mexico, on average it becomes about 15 cm high, but some specimens reach up to 25 cm. The stem is spherical in shape, with a diameter of about 8 cm and a light green color. This species can present 7 or 8 angular ribs covered with small white scales. The areolas are light brown in color and support black, gray or reddish spines. The flowers are reddish on the outside and on the inner base but are yellow on the inside more visible. They are about 6 cm wide and open in summer.


Originally from Mexico, it has a globose stem (although it tends to grow longer over time), from 10 to 20 cm wide. It is covered with white scales and is divided by 5 or 6 ribs usually without thorns. The flowers resemble daisies, are about 4 cm long and are yellow with a red center. The flowering period is summer.

Astrophytum quadricostatum

Similar to the astrophytum myriostigma, characterized by having only 4 ribs.

Bishop's cap - Astrophytum myriostigma: Ornatum mirbelli

Similar to the Ornatum but with yellow spines.
It has a cylindrical stem High up to 30 cm, with a diameter of 15. This species has eight ribs, with areoles at the edges with 5-11 spines about 3 cm long. The flowers are about 8 cm wide and light yellow in color.