Salvia zayuensis and Salvia toxantha (Lamiaceae), two new species from the Hengduan Mountains, China

Two new species of Salvia zayuensis and S. toxantha (Lamiaceae), from Southwest China, are described. Salvia zayuensis is similar to S. cyclostegia but is distinguished by its larger cauline leaves (18.2–24.0 cm), densely hoary appressed trichomes on young rachises and abaxial leaf and bract surfaces, and peach-shaped juvenile inflorescences maturing into 40 cm long. Its corolla is bicolored (purplish-brown upper lip, yellow lower lip) with the anther connective 0.15 cm shorter in arc length. Salvia toxantha resembles S. smithii in leaf shape, inflorescence structure, bract and bracteole morphology, and corolla color, yet it is characterized by the absence of lemon scent, longer pedicels and calyxes, a slender, bow-shaped corolla, and purple-brown spots on the middle lobe of lower lip. Additionally, its anther connective is ca. 0.4 cm shorter than that in S. smithii . Phylogenetic analysis of chloroplast genome places both new species within the subclade Eurysphace of subg. Glutinaria .