Haevermans, T. (2004). Euphorbia ambovombensis. The IUCN Red List of Threatened Species 2004: e.T44283A10872023. doi:10.2305/IUCN.UK.2004.RLTS.T44283A10872023.en. Downloaded on 13 October 2018.
Haevermans, T. (2004). Euphorbia cap-saintemariensis. The IUCN Red List of Threatened Species 2004: e.T44315A10889657. doi:10.2305/IUCN.UK.2004.RLTS.T44315A10889657.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia cremersii. The IUCN Red List of Threatened Species 2004: e.T44319A10890531. doi:10.2305/IUCN.UK.2004.RLTS.T44319A10890531.en. Downloaded on 13 October 2018.
Haevermans, T. (2004). Euphorbia cylindrifolia. The IUCN Red List of Threatened Species 2004: e.T44323A10891416. doi:10.2305/IUCN.UK.2004.RLTS.T44323A10891416.en. Downloaded on 13 October 2018.
Haevermans, T. (2004). Euphorbia francoisii. The IUCN Red List of Threatened Species 2004: e.T44351A10894925. doi:10.2305/IUCN.UK.2004.RLTS.T44351A10894925.en. Downloaded on 13 October 2018.
Haevermans, T. (2004). Euphorbia parvicyathophora. The IUCN Red List of Threatened Species 2004: e.T44414A10899895. doi:10.2305/IUCN.UK.2004.RLTS.T44414A10899895.en. Downloaded on 13 October 2018.
Haevermans, T. (2004). Euphorbia quartziticola. The IUCN Red List of Threatened Species 2004: e.T44431A10902997. doi:10.2305/IUCN.UK.2004.RLTS.T44431A10902997.en. Downloaded on 13 October 2018.
Haevermans, T. (2004). Euphorbia tulearensis. The IUCN Red List of Threatened Species 2004: e.T44454A10905297. doi:10.2305/IUCN.UK.2004.RLTS.T44454A10905297.en. Downloaded on 13 October 2018.
Haevermans, T. (2004). Euphorbia alcicornis. The IUCN Red List of Threatened Species 2004: e.T44277A10871051. doi:10.2305/IUCN.UK.2004.RLTS.T44277A10871051.en. Downloaded on 13 October 2018.
Haevermans, T. (2004). Euphorbia ankazobensis. The IUCN Red List of Threatened Species 2004: e.T44287A10872791. doi:10.2305/IUCN.UK.2004.RLTS.T44287A10872791.en. Downloaded on 14 October 2018.
Haevermans, T. (2004). Euphorbia berorohae. The IUCN Red List of Threatened Species 2004: e.T44301A10886867. doi:10.2305/IUCN.UK.2004.RLTS.T44301A10886867.en. Downloaded on 14 October 2018.
Haevermans, T. (2004). Euphorbia boinensis. The IUCN Red List of Threatened Species 2004: e.T44303A10887270. doi:10.2305/IUCN.UK.2004.RLTS.T44303A10887270.en. Downloaded on 14 October 2018.
Haevermans, T. (2004). Euphorbia capmanambatoensis. The IUCN Red List of Threatened Species 2004: e.T44314A10889451. doi:10.2305/IUCN.UK.2004.RLTS.T44314A10889451.en. Downloaded on 14 October 2018.
Bruegmann, M.M. & Caraway, V. (2003). Euphorbia deppeana. The IUCN Red List of Threatened Species 2003: e.T44130A10862650. doi:10.2305/IUCN.UK.2003.RLTS.T44130A10862650.en. Downloaded on 14 October 2018.
Bruegmann, M.M. & Caraway, V. (2003). Euphorbia eleanoriae. The IUCN Red List of Threatened Species 2003: e.T44131A10862735. doi:10.2305/IUCN.UK.2003.RLTS.T44131A10862735.en. Downloaded on 14 October 2018.
Haevermans, T. (2004). Euphorbia geroldii. The IUCN Red List of Threatened Species 2004: e.T44354A10895327. doi:10.2305/IUCN.UK.2004.RLTS.T44354A10895327.en. Downloaded on 14 October 2018.
Bruegmann, M.M. & Caraway, V. (2003). Euphorbia halemanui. The IUCN Red List of Threatened Species 2003: e.T44132A10862794. doi:10.2305/IUCN.UK.2003.RLTS.T44132A10862794.en. Downloaded on 14 October 2018.
Lambdon, P.W. & Ellick, S. (2016). Euphorbia heleniana. The IUCN Red List of Threatened Species 2016: e.T67379098A67379104. doi:10.2305/IUCN.UK.2016-1.RLTS.T67379098A67379104.en. Downloaded on 14 October 2018.
Bruegmann, M.M. & Caraway, V. (2003). Euphorbia herbstii. The IUCN Red List of Threatened Species 2003: e.T33602A9794978. doi:10.2305/IUCN.UK.2003.RLTS.T33602A9794978.en. Downloaded on 14 October 2018.
Haevermans, T. (2004). Euphorbia iharanae. The IUCN Red List of Threatened Species 2004: e.T44365A10886975. doi:10.2305/IUCN.UK.2004.RLTS.T44365A10886975.en. Downloaded on 14 October 2018.
Haevermans, T. (2004). Euphorbia millotii. The IUCN Red List of Threatened Species 2004: e.T44399A10892005. doi:10.2305/IUCN.UK.2004.RLTS.T44399A10892005.en. Downloaded on 15 October 2018.
IUCN SSC East African Plants Red List Authority. (2013). Euphorbia neospinescens. The IUCN Red List of Threatened Species 2013: e.T47348627A47348634. doi:10.2305/IUCN.UK.2013-2.RLTS.T47348627A47348634.en. Downloaded on 15 October 2018.
Gray, A., Stroud, S., Lambdon, P.W., Niissalo, M. & Renshaw, O. (2016). Euphorbia origanoides. The IUCN Red List of Threatened Species 2016: e.T43921A88582641. doi:10.2305/IUCN.UK.2016-1.RLTS.T43921A88582641.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia pachypodioides. The IUCN Red List of Threatened Species 2004: e.T44412A10899538. doi:10.2305/IUCN.UK.2004.RLTS.T44412A10899538.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia pirahazo. The IUCN Red List of Threatened Species 2004: e.T44423A10901671. doi:10.2305/IUCN.UK.2004.RLTS.T44423A10901671.en. Downloaded on 15 October 2018.
Santiana, J., Cerón, C. & Pitman, N. (2004). Euphorbia quitensis. The IUCN Red List of Threatened Species 2004: e.T45182A10980881. doi:10.2305/IUCN.UK.2004.RLTS.T45182A10980881.en. Downloaded on 15 October 2018.
Bruegmann, M.M. & Caraway, V. (2003). Euphorbia remyi. The IUCN Red List of Threatened Species 2003: e.T44150A10864688. doi:10.2305/IUCN.UK.2003.RLTS.T44150A10864688.en. Downloaded on 15 October 2018.
Bruegmann, M.M. & Caraway, V. (2003). Euphorbia rockii. The IUCN Red List of Threatened Species 2003: e.T33604A9795358. doi:10.2305/IUCN.UK.2003.RLTS.T33604A9795358.en. Downloaded on 15 October 2018.
CAMP Workshop, Kenya (November 1996). (1998). Euphorbia tanaensis. The IUCN Red List of Threatened Species 1998: e.T30898A9581019. doi:10.2305/IUCN.UK.1998.RLTS.T30898A9581019.en. Downloaded on 29 September 2018.
Haevermans, T. (2004). Euphorbia alfredii. The IUCN Red List of Threatened Species 2004: e.T44278A10871243. doi:10.2305/IUCN.UK.2004.RLTS.T44278A10871243.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia ankarensis. The IUCN Red List of Threatened Species 2004: e.T44286A10872590. doi:10.2305/IUCN.UK.2004.RLTS.T44286A10872590.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia aureoviridiflora. The IUCN Red List of Threatened Species 2004: e.T44292A10873828. doi:10.2305/IUCN.UK.2004.RLTS.T44292A10873828.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia beharensis. The IUCN Red List of Threatened Species 2004: e.T44294A10874285. doi:10.2305/IUCN.UK.2004.RLTS.T44294A10874285.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia croizatii. The IUCN Red List of Threatened Species 2004: e.T44322A10891200. doi:10.2305/IUCN.UK.2004.RLTS.T44322A10891200.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia didiereoides. The IUCN Red List of Threatened Species 2004: e.T44335A10893121. doi:10.2305/IUCN.UK.2004.RLTS.T44335A10893121.en. Downloaded on 21 October 2018.
Haevermans, T. (2004). Euphorbia gottlebei. The IUCN Red List of Threatened Species 2004: e.T44355A10895444. doi:10.2305/IUCN.UK.2004.RLTS.T44355A10895444.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia guillauminiana. The IUCN Red List of Threatened Species 2004: e.T44357A10895639. doi:10.2305/IUCN.UK.2004.RLTS.T44357A10895639.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia hedyotoides. The IUCN Red List of Threatened Species 2004: e.T44358A10895752. doi:10.2305/IUCN.UK.2004.RLTS.T44358A10895752.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia hofstaetteri. The IUCN Red List of Threatened Species 2004: e.T44362A10886541. doi:10.2305/IUCN.UK.2004.RLTS.T44362A10886541.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia itremensis. The IUCN Red List of Threatened Species 2004: e.T44368A10896155. doi:10.2305/IUCN.UK.2004.RLTS.T44368A10896155.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia mahabobokensis. The IUCN Red List of Threatened Species 2004: e.T44376A10897066. doi:10.2305/IUCN.UK.2004.RLTS.T44376A10897066.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia mahafalensis. The IUCN Red List of Threatened Species 2004: e.T44377A10897168. doi:10.2305/IUCN.UK.2004.RLTS.T44377A10897168.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia neohumbertii. The IUCN Red List of Threatened Species 2004: e.T44408A10898853. doi:10.2305/IUCN.UK.2004.RLTS.T44408A10898853.en. Downloaded on 16 October 2018.
Haevermans, T. (2004). Euphorbia paulianii. The IUCN Red List of Threatened Species 2004: e.T44415A10900078. doi:10.2305/IUCN.UK.2004.RLTS.T44415A10900078.en. Downloaded on 16 October 2018.
Haevermans, T. (2004). Euphorbia platyclada. The IUCN Red List of Threatened Species 2004: e.T44425A10902078. doi:10.2305/IUCN.UK.2004.RLTS.T44425A10902078.en. Downloaded on 16 October 2018.
Haevermans, T. (2004). Euphorbia primulifolia. The IUCN Red List of Threatened Species 2004: e.T44428A10902563. doi:10.2305/IUCN.UK.2004.RLTS.T44428A10902563.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia sakarahaensis. The IUCN Red List of Threatened Species 2004: e.T44441A10903984. doi:10.2305/IUCN.UK.2004.RLTS.T44441A10903984.en. Downloaded on 16 October 2018.
Haevermans, T. (2004). Euphorbia waringiae. The IUCN Red List of Threatened Species 2004: e.T44456A10905480. doi:10.2305/IUCN.UK.2004.RLTS.T44456A10905480.en. Downloaded on 16 October 2018.
Rivers, M.C., Fernandes, F. & da Silva Menezes de Sequeira, M. (2017). Euphorbia mellifera. The IUCN Red List of Threatened Species 2017: e.T102818634A102818638. doi:10.2305/IUCN.UK.2017-3.RLTS.T102818634A102818638.en. Downloaded on 15 October 2018.
Craven, P. & Loots, S. (2004). Euphorbia namibensis. The IUCN Red List of Threatened Species 2004: e.T46808A11082741. doi:10.2305/IUCN.UK.2004.RLTS.T46808A11082741.en. Downloaded on 16 October 2018.
Haevermans, T. (2004). Euphorbia neobosseri. The IUCN Red List of Threatened Species 2004: e.T44405A10898348. doi:10.2305/IUCN.UK.2004.RLTS.T44405A10898348.en. Downloaded on 16 October 2018.
Haevermans, T. (2017). Euphorbia tirucalli (amended version of 2004 assessment). The IUCN Red List of Threatened Species 2017: e.T44452A117034216. doi:10.2305/IUCN.UK.2017-2.RLTS.T44452A117034216.en. Downloaded on 15 October 2018.
Haevermans, T. (2004). Euphorbia enterophora. The IUCN Red List of Threatened Species 2004: e.T44342A10893927. doi:10.2305/IUCN.UK.2004.RLTS.T44342A10893927.en. Downloaded on 15 October 2018.
なお、命名者の異なる E. croizatii (Hurus.) Kitag. は米倉・梶田 (2003-) ではイトバトウダイ(別名: マツバトウダイ、ヒメトウダイ; 学名: E. kaleniczenkiiCzern. ex Trautv.)のシノニムとされているが、ミズーリ植物園はこの E. kaleniczenkii をセイヨウハギクソウ(学名: E. esula)のシノニム扱いとしており[67]、キュー植物園の World Checklist of Selected Plant Families (WCSP) は E. croizatii (Hurus.) Kitag. や E. kaleniczenkii var. nana Hurus. を、ロシアや中国北東部に分布するセイヨウハギクソウの変種 E. esula var. cyparissioidesBoiss. のシノニムとしている[68]。