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Castanea sativa
http://www.floridata.com/ref/c/cast_sat.cfm
Description and images.
Castanea sativa
http://caliban.mpiz-koeln.mpg.de/~stueber/thome/band2/tafel_001.html
Illustration.
Castanea sativa Miller
http://www.bioimages.org.uk/HTML/T1501.HTM
Collection of photographs, from Bioimages UK.