Extrafloral nectaries - a gland secreting nectar - are common among the Mimosoideae and the Caesalpinioideae and are also found in some Faboideae ( e.g. vetches Vicia sativa ) . Extrafloral nectaries are common among the Mimosoideae and the Caesalpinioideae , and are also found in some Faboideae ( e.g. Vicia sativa ) .