Hedgehog cactus may refer to:
- Pediocactus, a genus of cacti containing 6-11 species
 - Echinocereus, a genus of ribbed, usually small to medium-sized cylindrical cacti, comprising about 70 species from the southern United States and Mexico in very sunny rocky places
 - Echinopsis, a large genus of cacti native to South America containing 128 species
 
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