It is characterized by small , spherical mounds that sprout conical or cylindrical tubercles .
Mammillaria painteri is evergreen , meaning it keeps its leaves and color throughout all the seasons of the year .
Mammillaria painteri is characterized by small , spherical mounds that sprout conical or cylindrical tubercles .
Mammillaria painteri is evergreen , meaning it keeps its leaves and color throughout all the seasons of the year .