| Trochodendraceae Temporal range:
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|---|---|
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| Trochodendron aralioides | |
Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Trochodendrales Takhtajan ex Cronquist |
| Family: | Trochodendraceae Eichler |
| Genera | |
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Trochodendraceae is the only family of flowering plants in the order Trochodendrales. It comprises two extant genera, each with a single species[1] along with up to five additional extinct genera and a number of extinct species.[2] The living species are native to south east Asia. The two living species (Tetracentron sinense and Trochodendron aralioides) both have secondary xylem without vessel elements, which is quite rare in angiosperms. As the vessel-free wood suggests primitiveness, these two species have attracted much taxonomic attention.
- ^ Christenhusz, M. J. M. & Byng, J. W. (2016). "The number of known plants species in the world and its annual increase". Phytotaxa. 261 (3): 201–217. doi:10.11646/phytotaxa.261.3.1.
- ^ Manchester, S. R.; Kvaček, Z.; Judd, W. S. (2020). "Morphology, anatomy, phylogenetics and distribution of fossil and extant Trochodendraceae in the Northern Hemisphere". Botanical Journal of the Linnean Society. 195 (3): 467–484. doi:10.1093/botlinnean/boaa046.