↑ Spalik, K., et al. (2009). cpDNA rps16-5'trnk (UUU) および nrDNA ITS 配列から推測されるSium属 (Apiaceae 族 Oenantheae)内の属の境界。 Taxon 58(3), 735-48.
↑Spalik, K. and S. R. Downie. (2006). The evolutionary history of Sium sensu lato (Apiaceae): dispersal, vicariance, and domestication as inferred from ITS rDNA phylogeny.American Journal of Botany 93(5), 747-61.
↑Lambdon, P.W.; Ellick, S. (2016). "Berula bracteata". IUCN Red List of Threatened Species. 2016 e.T43985A67378473. doi:10.2305/IUCN.UK.2016-1.RLTS.T43985A67378473.en. Retrieved 17 November 2021.
↑Lambdon, P.W.; Ellick, S. (2016). "Berula burchellii". IUCN Red List of Threatened Species. 2016 e.T43986A67378501. doi:10.2305/IUCN.UK.2016-1.RLTS.T43986A67378501.en. Retrieved 17 November 2021.
External links
GRIN Species Records of Sium. Germplasm Resources Information Network (GRIN).