kumquat tree
— Noun
– English
～ any of several trees or shrubs of the genus Fortunella bearing small orange-colored edible fruits with thick sweet-flavored skin and sour pulp
kola nut tree
— Noun
– English
～ tree bearing large brown nuts containing e.g. caffeine; source of cola extract
Kentucky coffee tree
— Noun
– English
～ handsome tree of central and eastern North America having large bipinnate leaves and green-white flowers followed by large woody brown pods whose seeds are used as a coffee substitute