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Navarretia   divaricata   , endemic to western North America and most recently considered a single species with two subspecies, was re-examined in light of field work, DNA sequences, comparative morphology, and a review of herbarium specimens including types. From these studies, we lectotypify the material on which    N.   divaricata    is based, elevate   N.   divaricata   subsp.   vividior  , which is an allotetraploid, to species rank (as    N.   vividior    comb. et stat. nov .), and recognize three additional species:    N.   modocensis    sp. nov. ,    N.   aeroides    sp. nov. , and    N.   torreyella    sp. nov.    Navarretia   modocensis   , the diploid paternal progenitor of    N.   vividior   , is morphologically cryptic with respect to its allotetraploid offspring and difficult to distinguish on herbarium sheets.    Navarretia   aeroides   , the diploid maternal progenitor of    N.   vividior   , is nearly cryptic, but more easily distinguished from both    N.   modocensis    and    N.   vividior    by its smaller, more glandular inflorescences.    Navarretia   torreyella    is readily distinguished from all of these species, but has been generally mistaken for   N.   divaricata   subsp.   vividior   given its colored corolla tube and rare co-occurrence with the othervividior   -like species. Conservation assessments, an identification key, and table of comparative morphological features are provided for each species, emended descriptions for    N.   divaricata    and    N.   vividior   , and a discussion of the syntypes for    Gilia   divaricata    Torr. ex A.Gray.

phytokeys

Ex uno, multis : taxonomic revision in    Navarretia   divaricata    (  Polemoniaceae  ) and the recognition of four additional cryptic or near-cryptic species