Cryptantha is a genus of flowering plants in the borage family, Boraginaceae. They are known commonly as cat's eyes and popcorn flowers (the latter name is also used to refer to the closely related genus Plagiobothrys, and members of the subtribe of Amsinckiinae). They are distributed throughout western North America and western South America, but they are absent from the regions in between. These are annual or perennial herbs usually coated in rough hairs and bearing rounded flower corollas that are almost always white, but are yellow in a few species. Several morphological characters are used to distinguish species from one another, but the most definitive is the form of the nutlet, which varies in shape, size, color, and pattern of attachment. Systematics The genus has been reorganized several times. As of 2012 there are about 200 species. About 130 are limited to western North America, and about 70 species occur in western South America; three species are found on both continents. Species include: Cryptantha affinis – slender catseye, common cryptantha, quill cryptantha Cryptantha alfalfalis Cryptantha alyssoides Cryptantha ambigua – basin cryptantha, obscure cryptantha, Wilke's cryptantha Cryptantha aprica Cryptantha argentea Cryptantha barbigera — bearded catseye Cryptantha calycina Cryptantha calycotricha Cryptantha capituliflora Cryptantha carrizalensis Cryptantha chaetocalyx Cryptantha clandestina Cryptantha clevelandii – Cleveland's cryptantha Cryptantha clokeyi – Clokey's cryptantha Cryptantha congesta Cryptantha crassisepala – deertongue, thick-sepal catseye Cryptantha crinita – Sacramento cryptantha Cryptantha cynoglossoides Cryptantha decipiens – gravel cryptantha, gravel-bar catseye Cryptantha dichita Cryptantha diffusa Cryptantha dimorpha Cryptantha dissita Cryptantha dolichophylla Cryptantha dumetorum – bush-loving catseye Cryptantha echinella – hedgehog cryptantha, prickly cryptantha Cryptantha excavata – deepscar cryptantha Cryptantha fendleri – Fendler's cryptantha, sand-dune catseye Cryptantha filaginea Cryptantha filiformis Cryptantha flaccida – weakstem cryptantha Cryptantha foliosa Cryptantha ganderi – Gander's cryptantha Cryptantha glareosa Cryptantha globulifera Cryptantha glomeriflora – Truckee cryptantha Cryptantha glomerulifera Cryptantha gnaphalioides Cryptantha gracilis – narrowstem catseye, narrowstem pick-me-not Cryptantha granulosa Cryptantha haplostachya Cryptantha hispidula – Napa cryptantha Cryptantha hooveri – Hoover's cryptantha Cryptantha incana – Tulare cryptantha Cryptantha intermedia – Clearwater catseye, common cryptantha Cryptantha involucrata Cryptantha kelseyana – Kelsey's cryptantha Cryptantha kingii Cryptantha latefissa Cryptantha leiocarpa – coastal cryptantha Cryptantha limensis Cryptantha linearis Cryptantha longifolia Cryptantha macrocalyx Cryptantha marioricardiana Cryptantha mariposae – Mariposa cryptantha Cryptantha maritima – Guadalupe catseye Cryptantha marticorenae Cryptantha martirensis Cryptantha mendocina Cryptantha microstachys – Tejon cryptantha Cryptantha milobakeri – Milo Baker's cryptantha Cryptantha minima – little catseye, small cryptantha Cryptantha mohavensis – Mojave cryptantha