Any of numerous plants of the genus Penstemon,native to North America and eastern Asia,having opposite leaves,flowers with a usually two-lipped,variously colored corolla,and capsules containing many seeds.

• 钓钟柳属一种源于北美和东亚的长有对生叶和双唇形花及多色花冠和子荚孢的钓钟柳属植物