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Fagus
See list of 2 species in this genus-
1a. Leaf blades crenate-dentate, with 4–9 pairs of lateral veins; prickles of carpellate involucre ± straight to upcurved, relatively thinner and softer
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1b. Leaf blades serrate, with 9–14 pairs of lateral veins; prickles of carpellate involucre ± straight to recurved, relatively stouter and firmer
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Each photo represents one species in this genus.