Data from: A major range expansion for Platismatia wheeleri

Platismatia wheeleri was recently described as a species distinct from the
highly morphologically variable Platismatia glauca. Previously, P.
wheeleri was known only from intermountain western North America in
southern British Columbia, Idaho, Montana, Oregon and Washington. After
examining collections from the New York Botanical Garden and Arizona State
University herbaria we discovered that P. wheeleri was collected in
southern California and the Tatra Mountains of Slovakia. The morphology,
ecology and biogeography of P. wheeleri are discussed, and the importance
and utility of historical collections is highlighted. This article is
intended to alert researchers to the potential presence of P. wheeleri in
different regions of the world so we can better understand its historical
and current distribution and abundance.