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".
- "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]