Richard Wettstein (30 June 1863 in Vienna – 10 August 1931 in Trins) was an Austrian botanist.

Wettstein studied in Vienna, where he was a disciple of Anton Kerner von Marilaun (1831-1898) and married his daughter Adele.

[1] During his time at the University of Vienna, he founded the student-led Natural Science Association with his friend Karl Eggerth in 1882.

[3] In 1901 he became president of the Vienna Zoological-Botanical Society (Zoologisch-Botanische Gesellschaft), and during the same year took part in a scientific expedition to Brazil.

During his later years (1929–30), he traveled with his son, Friedrich, to eastern and southern Africa.