Question: Are Physoplexis and Alsobia both native to North America?
Sentence (from "Cakile"): Species in this genus are commonly known as searockets, though this name on its own is applied particularly to whatever member of the species is native or most common in the region concerned, the European searocket "Cakile maritima" in Europe, and the American searocket "C. edentula" in North America.
Relevant evidence: No