Tongoloa tagongensis (Apiaceae), a new species from the Hengduan Mountains, China

Tongoloa tagongensis (Apiaceae), is proposed as a new species from the Hengduan Mountains in Sichuan, western China. It is most similar to T. elata, but the new species’ roots are short conic to tuberous, lower leaves 2–3-ternate/pinnate, rays 4–11, and ribs more obvious. Description and illustrations are provided.