Platanus information from NPGS/GRIN
- Photographs of seed and fruit, drawing of an embryo.
- http://www.ars-grin.gov/cgi-bin/npgs/html/genus.pl?9494

Plane Trees
- Descriptions of plane trees (Platanus) grown in London, UK.
- http://www.aranya.co.uk/planes/

"A developmental and evolutionary analysis of embryology in Platanus (platanaceae)"
- A study of embryo development in the genus, but based on P. racemosa, including the implications for other genera. Floyd and others, American Journal of Botany
- http://www.amjbot.org/cgi/content/full/86/11/1523

Speaking the Plane truth
- Introduction to the genus. Brief descriptions, including growth forms and habits, and account of fossil forms.
- http://www.botgard.ucla.edu/html/MEMBGNewsletter/Volume5number2/Speakingtheplanetruth.html

Platanus - Wikipedia
- Short article, includes list of species, cultivated varieties, and some photographs. Links to species specific articles.
- http://en.wikipedia.org/wiki/Platanus