Abstract
An anatomical analysis of Evolvulus glomeratus (Convolvulaceae) specimens revealed a new species endemic to a rock outcrop in Pernambuco State, which is described and illustrated herein. Evolvulus saxatilis differs from Evolvulus glomeratus based on morphological and anatomical characters, including corolla and ovary shape, presence of epidermal vesicles in the anthers, boundaries of the anticlinal walls of the seed epidermal cells, sculpture of the periclinal walls, arrangement of xylem vessel elements, presence of pericycle lignification, mesophyll type, and presence of crystalliferous idioblast. A complete description, diagnosis, illustration, distribution map, and taxonomic comments are provided.
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