one stem emerging from the ground or
multiple stems emerging from the ground at one point :

Knobby-looking branches that bifurcate into smaller branches in a fractal pattern

spines=light, dense;              stem bark=darker   >   jumping cholla Cylindropuntia fulgida
spines=dark, uneven length;  stem bark=lighter   >   staghorn cholla Cylindropuntia echinocarpa

Learn more about 🌵︎ cactus family Cactaceae

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Uses by native peoples
(Ethnobotany database)