Approximately 0 seeds per gram
seed-counts are only a guide, not to be used for accurate calculations.
B and T World Seeds' reference number:
USDA average, annual, minimum temperature Zone:10
Type of plant - perennial
Mammillaria spinosissima white fld.
is included in the following B and T World Seeds flowering plant categories:
5: Cactus Seed List
43: Herbaceous Border Plant Seed List
62: Mexican Native and Introduced Plants