Sphenostemonaceae is a monotypic family of plants containing only the genus Sphenostemon of small evergreen trees or shrubs endemic to New Guinea, Queensland, Australia and New Caledonia. The Angiosperm Phylogeny Group II considers the family unplaced as to order within the euasterids II clade; however, some authorities place Sphenostemonaceae in the Dipsacales.… (More on Sphenostemonaceae)