XVI International Botanical Congess

Leaf architectural analysis shows that leaves of Castanea and subsect. Campylolepides of Quercus from East Asia can be separated: Campylolepides- Tooth type Spinose, complex tooth absent, 2 straight, regularly arranged and equally spaced, inter-secondary vein absent, 3 percurrent, closely spaced, highest order veins 4-5, veinlet absent or single, very rarely ramify once, fimbrial vein distinct. Castanea- Tooth type modified Urticoid (with long and thin apex), complex tooth rarely present, 2 straight or slightly curved, regularly or irregularly arranged, and equally or unequally spaced, inter-secondary vein rarely present, 3 percurrent, often forked and connected, moderately spaced, highest order veins 5-6, veinlet single or ramify once, rarely twice, fimbrial vein absent.