This shrubby Castilleja is unique to San Clemente Island. Scrophularia villosa, seen here on the left of the image, is known only from Santa Catalina, San Clemente and Guadalupe Islands. In an open rocky area on San Clemente Island, California. April 10th 2011, Image I11-4958.
Plantarum Brasiliae icones et descriptiones hactenus ineditae.Vindobonae [Vienna] : Antonii Strauss, 1827-31..biodiversitylibrary.org/page/276426Little known about lovely Physocalyx aurantiacus, sketched by Johann Baptist Emanuel Pohl while traveling in Brazil biodiversitylibrary.org/page/276426