Tetrapanax
Sponsor
Kindly sponsored by
Human Futures Foundation
Credits
Rachael Collings (2025)
Recommended citation
Collings, R.J. (2025), 'Tetrapanax' from the website Trees and Shrubs Online (treesandshrubsonline.
Family
- Araliaceae
A monospecific genus native to Taiwan, probably introduced to central and southern China (Frodin et al. 2003). For a full description see Tetrapanax papyrifer.
Tetrapanax sits within the Asian Palmate Group of the Araliaceae family, a clade distributed primarily in Asia and uniting genera with palmate venation, lobing or divisions (Plunkett et al. 2018). A lack of consistent morphological characters, coupled with difficulties in obtaining a clear evolutionary picture through DNA sequencing, has resulted in a muddled taxonomic history and excessive synonymy within Araliaceae. Phylogenetic studies have indicated a close alliance between Tetrapanax, Heteropanax and Heptapleurum (formerly Schefflera); however, discordance still exists, and a fully updated phylogeny has yet to be completed (Li & Wen 2016; Plunkett et al. 2018; Valcarcel & Wen 2019; Gallego-Narbon, Wen & Valcarcel 2022; Kang et al. 2023). One of the major works on the family, the seminal World Checklist and Bibliography of Araliaceae (Frodin et al. 2003) has been superseded by subsequent research. The ‘Araliaceae Central’ website is a good source of up-to-date, scientific information resulting from thirty years of collaborative research led by Pete Lowry and Greg Plunkett, referenced throughout this account as ‘Lowry & Plunkett 2025’.
Tetrapanax shares some characters with Heteropanax and Heptapleurum, particularly: habit; absence of prickles and pedicle articulations; and inflorescence architecture and valvate aestivation (Li & Wen 2016). Whilst Heptapleurum has compound leaves (usually palmate), Heteropanax have pinnately compound leaves and are not known to be in cultivation in our study area except as houseplants. Tetrapanax is easily distinguishable from Heteropanax and Heptapleurum by its simple and palmately lobed leaves, prominent, slender-pointed stipules, and 4-merous flowers (tetra meaning 4, panax meaning panacea, due to its medicinal uses – both originating from Greek).
The sheer size of its leaves makes it difficult to confuse Tetrapanax with other members of the Araliaceae; even a large-leaved Fatsia cannot compete for foliage size, while the largest-leaved Heptapleurum differ in their compound, rather than simple leaves. Although Brassaiopsis mitis has leaves of a similar size (50–70 cm across), they differ markedly in their shape and in the lack of ferruginous tomentum; Brassaiopsis is also armed with prickles where Tetrapanax has none.
To the uninitiated, Tetrapanax may bear some resemblance to the (totally unrelated) genus Gunnera, but differentiation is easily achieved on closer inspection by virtue of the latter’s dense prickles and thickly rough-textured leaves. Indeed, Tetrapanax may be considered a more refined architectural substitute for Gunnera (especially as the latter is increasingly shunned due to its tendency to invasiveness); however, Tetrapanax is reportedly less tolerant of waterlogged soils, and also has the potential to become invasive where conditions permit, due to its suckering habit. Although it lacks vicious prickles, working with Tetrapanax is known to cause unpleasant reactions with human skin, eyes and lungs due to its dense irritant hairs (M. Clifford, pers. comms.; Wu, Weber & Imhof 2004; Giannattasio et al. 1996).
Traditionally Tetrapanax has been cultivated in warmer, wetter climates, with mature specimens in the UK more commonly seen in the southwest; however, a large collection can be seen at Walmer Castle in Kent, where Head Gardener Philip Oostenbrink is applying for National Plant Collection status in 2025 (pers. comm.). Newer collections from higher altitudes are generally hardier, and these are helping to make Tetrapanax a more popular and garden-worthy plant across a wider area.
