Biology:Zanthoxylum dipetalum

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Short description: Species of tree

Zanthoxylum dipetalum
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Rutaceae
Genus: Zanthoxylum
Z. dipetalum
Binomial name
Zanthoxylum dipetalum

Zanthoxylum dipetalum is a rare species of tree in the family Rutaceae and in the same genus as Sichuan pepper. It is known by the Hawaiian names Kāwa'u and Heaʻe and is endemic to the Hawaiian archipelago, where it grows in forests on 3 or 4 of the islands.[2]

There are two varieties.[2]

  • Z. d. var. dipetalum is present on Kauaʻi, in the mountains of Oʻahu, on Hawaiʻi in Hawaiʻi Volcanoes National Park, and possibly on Molokaʻi.
  • Z. d. var. tomentosum is known from fewer than 30 individuals on Hualālai volcano on Hawaiʻi.[3][2][4] This variety is a federally listed endangered species of the United States.

The roots of Z. dipetalum have been found to contain several chemical compounds, including canthin-6-one, chelerythrine, nitidine, tembetarine, avicennol, xanthoxyletin, lupeol, hesperidin, sitosterol, and magnoflorine.[5]


  1. Portner, T.; Keir, M.; Gon, S.M.; Sporck-Koehler, M.; Chau, M.; Caraway, V.L.; Kwon, J. (2015). "Zanthoxylum dipetalum". IUCN Red List of Threatened Species 2015: e.T62986A78764685. doi:10.2305/IUCN.UK.2015-4.RLTS.T62986A78764685.en. Retrieved 18 November 2021. 
  2. 2.0 2.1 2.2 Zanthoxylum dipetalum. The Nature Conservancy.
  3. Keir, M.; Portner, T.; Weisenberger, L.; Caraway, V.L.; Kwon, J. (2015). "Zanthoxylum dipetalum var. tomentosum". IUCN Red List of Threatened Species 2015: e.T30781A78767557. doi:10.2305/IUCN.UK.2015-4.RLTS.T30781A78767557.en. Retrieved 18 November 2021. 
  4. Zanthoxylum dipetalum. Center for Plant Conservation.
  5. Fish, F., et al. (1975). Alkaloids, coumarins, triterpenes and a flavanone from the root of Zanthoxylum dipetalum. Phytochemistry 14(9) 2073.

External links

Wikidata ☰ Q8066280 entry