

Santa Clara Thorn-mint Acanthomintha lanceolata
Santa Clara Thorn-mint is an annual wildflower native to the lower 48 states. It blooms Apr – Jun.
More about this plant
Acanthomintha lanceolata is a species of flowering plant in the mint family known by the common name Santa Clara thornmint. It is endemic to California, where it is known from several counties surrounding and south of the San Francisco Bay Area. It is an uncommon resident of rocky habitat in coastal and inland mountain ranges. Wikipedia →
Growing & care
USDA PLANTS · TRY- Hardiness
- ≥ zone 11 derived from its U.S. range
- Lifespan
- Annual
How we know this (1) Methods & honest limits
We take the plant’s U.S. county range and look up each county’s long-term climate, then summarise: native rainfall = the median annual rainfall across its counties; heat tolerance = the warm end (90th percentile) of average temperature across its range (mirroring how our cold-hardiness floor uses an extreme). Counties + medians blunt the roadside/observer bias that makes point-level climate unreliable. Needs at least five placeable counties.
Honest limits: A realized, sampling-biased niche (where it has been recorded, not its physiological optimum), and county climate is coarse — large Western counties span deserts and mountains. Derived guide, never a measured fact.
Sources for this entry (12) Open & cited
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