The story
Because they tend to grow southward.
Etymology from Wiktionary, CC BY-SA 4.0.
compass cactus
Today it means: Any of the genus Ferocactus of barrel cactuses, of southwestern US and northwestern Mexico. Full definition →
Today it means: Any of the genus Ferocactus of barrel cactuses, of southwestern US and northwestern Mexico. Full definition →
Because they tend to grow southward.
Etymology from Wiktionary, CC BY-SA 4.0.