Bouvardia viticella (Rubiaceae, spermacoceae), a new species from the mixed temperate forest of Mexico

Abstract

Bouvardia viticella Lorea-Hernández & Lozada-Perez is described and illustrated. This new species is distinguished by its scandent habit, main stem thick suberose at base, plinerved leaves, while flowers, short corolla tube evenly pubescent within, and corolla lobes densely papillose adaxially. Partial inflorescences and exserted anthers in short-styled flowers place it in Bouvardia Salisbury subg. Bouvardiastrum Schlechtendal, but its relationships below this level are not so clear.