Echinocereus engelmannii var. armatus
- Taxonomic Rank: Variety
- Botanical Family: Cactaceae
- WCVP Morphological Data: Recorded natively as a succulent subshrub.
Echinocereus engelmannii var. armatus (commonly known as Engelmann's hedgehog cactus or Saint's cactus) is a shrubby cactus within the Cactaceae family. It is found natively in North America. Within its native range, this variety is most commonly linked to desert or dry shrubland conditions. It is a naturally occurring variety of Echinocereus engelmannii, which is linked below, along with related subspecies and varieties of this species.