Crossosomatales

The Crossosomatales are an order, first recognized as such by APG II. They are flowering plants included within the Rosid eudicots.

Strasburgeriaceae is a small family of flowering plants in the order Crossosomatales, only found in New Zealand and New Caledonia. It contains two genera, Strasburgeria and Ixerba. Both genera have simple, evergreen, alternated leaves, often in whorl-like clusters, with gland-tipped serrations, hermaphroditic, pentamerous flowers with persistent sepals, clawed petals, flat and long filaments that extend beyond the petals and a persistent style with a punctiform stigma.

Guamatela is a genus of flowering plants in the order Crossosomatales. Guamatela is the only genus in the family Guamatelaceae. The genus comprises a single species, the type species, Guamatela tuerckheimii Donn.Sm., an evergreen shrub with a prostrate habit that is native to Mexico, Guatemala, and Honduras. The genus Guamatela had formerly been included in the family Rosaceae before the Angiosperm Phylogeny Group placed it in the Guamatelaceae in 2009.

Aphloia is a genus of flowering plants that contains a single species, Aphloia theiformis, the sole species of the monogeneric family Aphloiaceae. It is a species of evergreen shrubs or small trees occurring in East Africa, Madagascar, the Mascarene Islands and the Seychelles.

Ixerba brexioides, the sole species in the genus Ixerba, is a bushy tree with thick, narrow, serrated, dark green leaves and panicles of white flowers with a green heart. The fruit is a green capsule that splits open to reveal the black seeds partly covered with a fleshy scarlet aril against the white inside of the fruit. Ixerba is endemic to the northern half of the North Island of New Zealand. Common names used in New Zealand are tawari (or tāwari) for the tree and whakou when in flower. It is assigned to the family Strasburgeriaceae.

Geissoloma is a genus of flowering plants in the monotypic family Geissolomataceae, native to the Cape Province of South Africa. Geissoloma marginatum is the only species in the family. It is sometimes called guyalone in English. The plants are xerophytic evergreen shrubs and are known to accumulate aluminum.