May 8, 2018 0 Commentsadmin
The young plant has a low, globose stem, that becomes columnar in age, attaining a height of up to 60 cm. The skin is green with grey-white felted spots. Some varieties are so thickly covered with these spots that they completely hide the green of the skin. There are usually 5 ribs, rarely 7 to 8, measuring 4.5 cm in height. The areoles are rouad or elliptic with brown wool, which later disappears. The flowers arise on the crown, often several at a time, measure’ 4 to 6 cm in diameter and are a pale yellow colour. The style and 7 lobed stigma are yellow. The ovary is green and opens in the shape of a star; the seed is large, boat shaped and brown.
The specific name myriostigma means multispotted. Many varieties are to be found in collections. One that is of particular interest is the four-ribbed variety ‘quadricostata’ of Tamaulipas which bears a small yellow flower. Coahuile is the home of the taller myriostigma, thickly covered with grey-white scales. The shape and profusion of flowers which it bears throughout the whole summer make Astrophytum myriostigma, including all its varieties, one of the favourite Mexican cacti.
Astrophytum myriostigma does well wherever there is adequate sunlight, heat and, in the growth period water. In winter it requires a dry environment, light and a temperature of about 10°C. It is propagated from the seed which germinates soon at a temperature of 25°C.