Acronychia J.R.Forst. & G.Forst.

Shrubs or trees, evergreen, unarmed. Trichomes simple. Leaves opposite, trifoliolate or simple. Inflorescences paniculate to cymose or rarely reduced to solitary flowers, axillary and/or infrafoliar, similar to infructescences in size and surface features. Flowers bisexual, longer than wide in bud, 4-merous. Sepals persistent in fruit. Petals valvate, usually hooked adaxially at apex and usually becoming recurved or reflexed. Stamens 8, alternately unequal in length; filaments gradually tapering from rather broad base to subulate apex, usually ciliate towards base and retrorsely pilose at about middle adaxially, without raised glands. Gynoecium a 4-carpelled subapocarpous pistil (A. octandra) or syncarpous and 4-or rarely 4–8-loculed; ovules 2 per locule; style apical; stigma punctiform or capitellate, not more than  c. 0.3 mm wide. Fruit drupaceous, of 4 basally connate carpels (A. octandra) or syncarpous and 4-or rarely 4–8-carpelled; endocarp cartilaginous or thinly so. Seeds in pairs or occasionally solitary, ovoid or ellipsoid or irregular in shape due to crowding, smooth to finely tuberculate, muricate, or rugose, usually with enlarged chalazal region; testa with thick or sometimes thin sclerotesta surrounded by an outer layer of compact parenchymatous tissue; endosperm copious. Embryo straight or slightly curved; cotyledons flattened, ovate to elliptic; hypocotyl terminal, considerably narrower than cotyledons.