Eng., ac), a word found, variously modified, in all Germanic languages, and applied to plants of the genus Quercus, natural order Fagaceae (Cupuliferae of de Candolle), including some of the most important timber trees of the north temperate zone.
Perhaps even more striking is the absence 01 Cupuliferae; Quercus, in particular, which from Tertiary times ha~ been a conspicuous northern type and in Malavan tropical condition~ has developed others which are widely divergent.
Cupuliferae are absent except Fagus in Australia and New Zealand.
Of Cupuliferae, Quercus in three species only reaches Colombia, but Fagus, with only a single one in North America, is represented by several from Chile southwards and thence extends to New Zealand and Tasmania.
CUPULIFERAE, a botanical order, or, in recent arrangements, group of orders, containing several familiar trees.
Fagaceae (Cupuliferae in a restricted sense).