(Vol. 04, 2001-12) A New Cryptic Species of Nemophila (Hydrophyllaceae) from Texas and the Leptotypification of N. Phacelioides Nuttall
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Nemophila sayersensis, a cryptic species restricted to sandy, nutrient poor soils and sister to N. phacelioides, is described and illustrated. While examining type material of N. phacelioides and that of its synonyms, it became obvious that the species had never been typified despite its widespread distribution and treatment in numerous revisions. We here typify all named entities associated with the two species.