Astrophytum myriostigma tricostatum
(This plant comes in a 3.5 inch pot. All of our plants are grown under the same conditions, although not all the plants are the same. You will receive a similar plant in size and shape to the ones in the pictures. Our plants are hand-picked and carefully selected to bring you the best quality possible. Please allow us up to 3 business days to process your order. If you wish to receive your order on a specific date, or have special instructions, please add a note at the checkout . The plant is shipped in its pot to prevent any damage to the roots).
This species is a nursery cultivated cacti, a strikingly pretty, old cultivar with only three ribs with light or dense white flecks that cover the stem. This cultivar tends to be unstable, and some of the three ribbed specimens develop additional ribs as they age. It produces flowers that arise from the areole at the tip of the stem on mature plant (at least 4-5 years old) they are large, funnel-shaped, yellow (sometimes with an orange or red base), 5-7 cm wide. Blooming intermittently throughout the warm months from spring to autumn. Relatively easy to grow, grows much faster with a low nitrogen content fertilizer in spring and summer.
Watering: sparingly and dry in winter
Sun exposure: Light shade to full sun
Hardy to -7°C for short periods
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz