

Edwards' Mock Wallflower Eutrema edwardsii
Edwards' Mock Wallflower is a perennial wildflower native to Alaska, Canada, and Greenland.
More about this plant
Eutrema edwardsii, called Edwards' mock wallflower, is a species of flowering plant in the wasabi genus Eutrema, mustard family Brassicaceae. It has a nearly panarctic distribution, only absent from northern Europe, and extending to Tibet. A rhizomatous geophyte reaching 18 in (46 cm), it is found in a variety of arctic and subarctic habitats; tundra, screefields, formerly glaciated hills, grassy streamsides, and peat ridges. It is an allopolyploid complex of tetraploid, hexaploid, and octaploid populations. Wikipedia →
Growing & care
USDA PLANTS · TRY- Lifespan
- Perennial
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 (14) Open & cited
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