Barrel Cactus (Echinocactus genus)

This profile represents Echinocactus at genus rank. [Kew](https://powo.science.kew.org/taxon/30000246-2) accepts the genus. No species, cultivar or planting material is chosen, and no common height, hardiness, water need or measured fire performance is assigned to every member. ## County source context The [2014 county list](https://www.slocounty.ca.gov/departments/planning-building/forms-documents/environmental-forms-and-documents/plants-information/county-approved-plant-list), page 11, prints Echinocactus/F2 in a shrub context. F2 is the source’s favorable fire-retardant category for 30–70 feet. The 2014 source name does not resolve its historical circumscription or select a modern member. [Kew now treats E. grusonii as Kroenleinia grusonii](https://powo.science.kew.org/taxon/87403-2). This record preserves the printed generic name, not an assertion that the source assessed the present-day narrower genus or Golden Barrel Cactus. Current biological scope and planting material remain unresolved. These are qualified documentary source contexts at the printed generic-name scope, not verified individual-member assessments. The catalog category organizes this record without establishing one habit or use for every member. Keep regional ratings separate, identify the actual plant before choosing placement, and follow the source’s spacing, watering and dead-material-removal conditions. No plant is fireproof.