山羊百科，林文智老師的植物、山岳、攝影紀錄

Part I

• Cantino, Contr. Gray Herb. 211: 1-105 1982；https://www.biodiversitylibrary.org/page/39561075#page/218/mode/1up

Cantino, Philip Douglas；A monograph of the genus Physostegia (Labiatae)

Part II

Part III

1. Shinners, Lloyd H. 1951 Two New Texas Species of Physostegia (Labiatae) Field & Lab. 19: 166-168