The reference list of 874 field botany entries principally from 1985 to 2006 updates two previous reference lists, the last of which appeared in 1989. Seventy-seven relevant entries through 1987 are included that were not indexed in the last reference list. One hundred fifty-two entries are from 1989 or earlier, 391 from the 1990s, and 331 since 2000. The references include 606 peer-reviewed journal articles, 67 scientific botanical books, 62 technical articles, 46 theses, 30 technical reports, 22 dissertations, 18 book chapters, and 23 popular books. The four largest botanical subjects within 11 subdivisions are floristics (247), synecology (205), autecology (134), and systematics (126).