Physaria douglasii subsp. tuplashensis
Novon 12: 322. 2002.
Cauline leaves imbricate, blade sometimes orbicular. Fruit valves: trichomes stalked.
Phenology: Flowering May–Jun(-Aug).
Habitat: Caliche soil with sagebrush
Elevation: 300 m
Of conservation concern.
It is possible that subsp. tuplashensis is simply an ecotype, or that its phenotype is in response to its severe habitat on the White Bluffs of the Columbia River.