Sphenostemon

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Campanulids
Ordo: Paracryphiales

Familia: Paracryphiaceae
Genus: Sphenostemon
Species (10): S. papuanus – ...
Name

Sphenostemon Baill.
References

USDA, ARS, Germplasm Resources Information Network. Sphenostemon in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Sphenostemon is the genus of small evergreen trees or shrubs native to New Guinea, Queensland (Australia) and New Caledonia. They have opposite or spiral leaves, and at most small stipules. The small flowers, borne in terminal inflorescences, have free (i.e. unjoined) sepals and petals. The anthers have thick filaments. The fruit, a berry, is fleshy and contains two seeds. The genus is described as "particularly poorly known".[2]
Taxonomy

In the 2009 APG III system, the genus is placed in the family Paracryphiaceae, along with Paracryphia and Quintinia.[3] The earlier APG II system placed it alone in family Sphenostemonaceae.[4]
References

"IPNI Plant Name Query Results for Sphenostemon", The International Plant Names Index, retrieved 2014-09-19
Stevens, P.F., "Paracryphiaceae", Angiosperm Phylogeny Website, retrieved 2014-09-19
Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III". Botanical Journal of the Linnean Society. 161 (2): 105–121. doi:10.1111/j.1095-8339.2009.00996.x.
The Angiosperm Phylogeny Group (2003). "An update of the Angiosperm classification for the orders of flowering plants: APG II". Botanical Journal of the Linnean Society. Linnean Society of London. 141 (4): 399–436. doi:10.1046/j.1095-8339.2003.t01-1-00158.x.[dead link]