A 20th-century system of plant taxonomy, the Judd system (1999-2016) of plant classification was drawn up by the American botanist Walter S. Judd (1951-) and collaborators, partially based on APG schemes.

2016 system

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Bibliography

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  • Judd, W., Campbell, C., Kellog, E., Stevens, P. (1999). Plant systematics: a phylogenetic approach. Sinauer Associates.
  • Judd, W., Campbell, C., Kellog, E., Stevens, P. (2002). Plant systematics: a phylogenetic approach. 2nd ed. Sinauer Associates.
  • Judd, W., Campbell, C., Kellog, E., Stevens, P., Donoghue, M. (2002). Plant systematics: a phylogenetic approach. 3rd ed. Sinauer Associates. ISBN 0-87893-407-3. Google Books.
  • Judd, W., Campbell, C., Kellog, E., Stevens, P., Donoghue, M. (2016). Plant systematics: a phylogenetic approach. 4th ed. Sinauer Associates. ISBN 978-1-60535-389-0. Sinauer website.