It may have as few as 3 or more than 5 rib sections.
Attributes - Astrophytum myriostigma columnare
Plant Type: Succulent
Bloom Season: Early Summer through Late Summer
Flower Color: Yellow
Height: 8 in. to 1 ft.
Width: 8 in.
Sunlight: Full Sun
Climate: Zones 7, 8, 9, 10, 11
Notes: Thrives in Dry Climates, Hot Climates. Container Plants, Drought Tolerant, Low Maintenance.