# Guioa

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***Guioa*** is a [genus](/source/Genus) of about 70 described species in the maple and lychee family [Sapindaceae](/source/Sapindaceae). It has a wide distribution, ranging from [mainland Southeast Asia](/source/Mainland_Southeast_Asia), through [Malesia](/source/Malesia) and [Papuasia](/source/Papuasia) to eastern Australia and islands of the western Pacific.[1][2]

Many *Guioa* species are threatened to varying degrees, as recognised by the [International Union for Conservation of Nature](/source/International_Union_for_Conservation_of_Nature) (IUCN). Twenty five species have IUCN statuses of either [critically endangered](/source/Critically_endangered), [endangered](/source/Endangered_species) or [vulnerable](/source/Vulnerable_species).

The Australian species are known to the [logging](/source/Logging) industry as cedars, though they have no direct relationship with true [cedars](/source/Cedrus) nor the Australian members of the [Meliaceae](/source/Meliaceae) which are also known as cedars.[citation needed]

## Species

The following is a complete list of species accepted by [Plants of the World Online](/source/Plants_of_the_World_Online). As of October 2025 there are 69 species:[1]

- *[Guioa acuminata](/source/Guioa_acuminata)* Radlk. – vulnerable[3]
- *[Guioa acutifolia](/source/Guioa_acutifolia)* Radlk.
- *[Guioa amabilis](/source/Guioa_amabilis)* Kaneh. & Hatus.
- *[Guioa aryterifolia](/source/Guioa_aryterifolia)* Radlk. – endangered[4]
- *[Guioa aryteroides](/source/Guioa_aryteroides)* Guillaumin
- *[Guioa asquamosa](/source/Guioa_asquamosa)* Welzen – vulnerable[5]
- *[Guioa bicolor](/source/Guioa_bicolor)* Merr. – vulnerable[6]
- *[Guioa bijuga](/source/Guioa_bijuga)* (Hiern) Radlk.
- *[Guioa capillacea](/source/Guioa_capillacea)* A.C.Sm.
- *[Guioa chrysea](/source/Guioa_chrysea)* A.C.Sm.
- *[Guioa comesperma](/source/Guioa_comesperma)* Radlk.
- *[Guioa contracta](/source/Guioa_contracta)* Radlk.
- *[Guioa coriacea](/source/Guioa_coriacea)* (Radlk.) Radlk.
- *[Guioa crenata](/source/Guioa_crenata)* Radlk.
- *[Guioa crenulata](/source/Guioa_crenulata)* Radlk.
- *[Guioa diplopetala](/source/Guioa_diplopetala)* (Hassk.) Radlk.
- *[Guioa discolor](/source/Guioa_discolor)* Radlk. – vulnerable[7]
- *[Guioa elegans](/source/Guioa_elegans)* Radlk.
- *[Guioa elliptica](/source/Guioa_elliptica)* Welzen
- *[Guioa fusca](/source/Guioa_fusca)* Radlk.
- *[Guioa glauca](/source/Guioa_glauca)* (Labill.) Radlk.
- *[Guioa gracilis](/source/Guioa_gracilis)* (Pancher & Sebert) Radlk.
- *[Guioa grandifoliola](/source/Guioa_grandifoliola)* Welzen – endangered[8]
- *[Guioa hirsuta](/source/Guioa_hirsuta)* Welzen
- *[Guioa hospita](/source/Guioa_hospita)* Radlk. - critically endangered[9]
- *[Guioa koelreuteria](/source/Guioa_koelreuteria)* (Blanco) Merr.
- *[Guioa koniamboensis](/source/Guioa_koniamboensis)* Guillaumin
- *[Guioa lasioneura](/source/Guioa_lasioneura)* Radlk.
- *[Guioa lentiscifolia](/source/Guioa_lentiscifolia)* Cav.
- *[Guioa malukuensis](/source/Guioa_malukuensis)* Welzen – vulnerable[10]
- *[Guioa megacarpa](/source/Guioa_megacarpa)* Welzen
- *[Guioa melanopoda](/source/Guioa_melanopoda)* Merr. & L.M.Perry – vulnerable[11]
- *[Guioa membranifolia](/source/Guioa_membranifolia)* Radlk. – vulnerable[12]
- *[Guioa microsepala](/source/Guioa_microsepala)* Radlk.
- *[Guioa misimaensis](/source/Guioa_misimaensis)* Welzen
- *[Guioa molliuscula](/source/Guioa_molliuscula)* Radlk. – near threatened[13]
- *[Guioa montana](/source/Guioa_montana)* C.T.White
- *[Guioa multijuga](/source/Guioa_multijuga)* Welzen – endangered[14]
- *[Guioa myriadenia](/source/Guioa_myriadenia)* Radlk. – endangered[15]
- *[Guioa normanbiensis](/source/Guioa_normanbiensis)* Welzen – endangered[16]
- *[Guioa novobritannica](/source/Guioa_novobritannica)* Welzen – endangered[17]
- *[Guioa novoebudaensis](/source/Guioa_novoebudaensis)* Welzen
- *[Guioa oligotricha](/source/Guioa_oligotricha)* Merr. & L.M.Perry – endangered[18]
- *[Guioa ovalis](/source/Guioa_ovalis)* Radlk.
- *[Guioa palawanica](/source/Guioa_palawanica)* Welzen – endangered[19]
- *[Guioa parvifoliola](/source/Guioa_parvifoliola)* Merr. – critically endangered[20]
- *[Guioa patentinervis](/source/Guioa_patentinervis)* Radlk. – vulnerable[21]
- *[Guioa pauciflora](/source/Guioa_pauciflora)* Radlk. – vulnerable[22]
- *[Guioa pectinata](/source/Guioa_pectinata)* Radlk.
- *[Guioa pleuropteris](/source/Guioa_pleuropteris)* (Blume) Radlk.
- *[Guioa plurinervis](/source/Guioa_plurinervis)* Radlk. – vulnerable[23]
- *[Guioa pseudoamabilis](/source/Guioa_pseudoamabilis)* Welzen
- *[Guioa pteropoda](/source/Guioa_pteropoda)* Radlk.
- *[Guioa pterorhachis](/source/Guioa_pterorhachis)* Welzen
- *[Guioa pubescens](/source/Guioa_pubescens)* (Zoll. & Moritzi) Radlk.
- *[Guioa punctata](/source/Guioa_punctata)* Welzen
- *[Guioa reticulata](/source/Guioa_reticulata)* Radlk. – endangered[24]
- *[Guioa rhoifolia](/source/Guioa_rhoifolia)* (A.Gray) Radlk.
- *[Guioa rigidiuscula](/source/Guioa_rigidiuscula)* Radlk.
- *[Guioa sarcopterifructa](/source/Guioa_sarcopterifructa)* Welzen
- *[Guioa scalariformis](/source/Guioa_scalariformis)* Welzen – vulnerable[25]
- *[Guioa semiglauca](/source/Guioa_semiglauca)* (F.Muell.) Radlk.
- *[Guioa subsericea](/source/Guioa_subsericea)* Radlk.
- *[Guioa sufusana](/source/Guioa_sufusana)* Welzen
- *[Guioa truncata](/source/Guioa_truncata)* Radlk. – endangered[26]
- *[Guioa unguiculata](/source/Guioa_unguiculata)* Welzen – vulnerable[27]
- *[Guioa venusta](/source/Guioa_venusta)* Radlk.
- *[Guioa villosa](/source/Guioa_villosa)* Radlk.
- *[Guioa waigeoensis](/source/Guioa_waigeoensis)* Welzen – vulnerable[28]

## References

1. ["*Guioa* Cav."](https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:36427-1). *Plants of the World Online*. Board of Trustees of the Royal Botanic Gardens, Kew. 2025. Retrieved 31 October 2025.

1. ["*Guioa* Cav."](https://www.gbif.org/species/7265035). *Global Biodiversity Information Facility*. 2025. Retrieved 31 October 2025.

1. Energy Development Corporation (EDC) . (2021). "*Guioa acuminata*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-2.RLTS.T37350A153536002.en](https://doi.org/10.2305/IUCN.UK.2021-2.RLTS.T37350A153536002.en). Retrieved 31 October 2025.

1. Jimbo, T. (2021). "*Guioa aryterifolia*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-1.RLTS.T142858473A143764074.en](https://doi.org/10.2305/IUCN.UK.2021-1.RLTS.T142858473A143764074.en). Retrieved 31 October 2025.

1. van Welzen, P.C. (1998). "*Guioa asquamosa*". Vol. 1998. [doi:10.2305/IUCN.UK.1998.RLTS.T37351A10046052.en](https://doi.org/10.2305/IUCN.UK.1998.RLTS.T37351A10046052.en). Retrieved 31 October 2025.

1. Energy Development Corporation (EDC) . (2021). "*Guioa bicolor*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-3.RLTS.T37352A153536034.en](https://doi.org/10.2305/IUCN.UK.2021-3.RLTS.T37352A153536034.en). Retrieved 31 October 2025.

1. Energy Development Corporation (EDC) . (2021). "*Guioa discolor*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-3.RLTS.T37353A153536066.en](https://doi.org/10.2305/IUCN.UK.2021-3.RLTS.T37353A153536066.en). Retrieved 31 October 2025.

1. Jimbo, T. (2021). "*Guioa grandifoliola*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-1.RLTS.T37354A185827587.en](https://doi.org/10.2305/IUCN.UK.2021-1.RLTS.T37354A185827587.en). Retrieved 31 October 2025.

1. Jimbo, T. (2021). "*Guioa hospita*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-1.RLTS.T37355A185827621.en](https://doi.org/10.2305/IUCN.UK.2021-1.RLTS.T37355A185827621.en). Retrieved 31 October 2025.

1. van Welzen, P.C. (1998). "*Guioa malukuensis*". Vol. 1998. [doi:10.2305/IUCN.UK.1998.RLTS.T37358A10046332.en](https://doi.org/10.2305/IUCN.UK.1998.RLTS.T37358A10046332.en). Retrieved 31 October 2025.

1. van Welzen, P.C. (1998). "*Guioa melanopoda*". Vol. 1998. [doi:10.2305/IUCN.UK.1998.RLTS.T37359A10046375.en](https://doi.org/10.2305/IUCN.UK.1998.RLTS.T37359A10046375.en). Retrieved 31 October 2025.

1. Putri, W.U. (2024). "*Guioa membranifolia*". Vol. 2024. [doi:10.2305/IUCN.UK.2024-1.RLTS.T169000140A169370178.en](https://doi.org/10.2305/IUCN.UK.2024-1.RLTS.T169000140A169370178.en). Retrieved 31 October 2025.

1. Jimbo, T. (2021). "*Guioa molliuscula*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-1.RLTS.T37360A185827660.en](https://doi.org/10.2305/IUCN.UK.2021-1.RLTS.T37360A185827660.en). Retrieved 31 October 2025.

1. Putri, W.U. (2024). "*Guioa multijuga*". Vol. 2024. [doi:10.2305/IUCN.UK.2024-1.RLTS.T37361A177980642.en](https://doi.org/10.2305/IUCN.UK.2024-1.RLTS.T37361A177980642.en). Retrieved 31 October 2025.

1. van Welzen, P.C. (1998). "*Guioa myriadenia*". Vol. 1998. [doi:10.2305/IUCN.UK.1998.RLTS.T37362A10042213.en](https://doi.org/10.2305/IUCN.UK.1998.RLTS.T37362A10042213.en). Retrieved 31 October 2025.

1. Jimbo, T. (2021). "*Guioa normanbiensis*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-1.RLTS.T37363A185827695.en](https://doi.org/10.2305/IUCN.UK.2021-1.RLTS.T37363A185827695.en). Retrieved 31 October 2025.

1. Jimbo, T. (2021). "*Guioa novobritannica*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-1.RLTS.T37364A185827725.en](https://doi.org/10.2305/IUCN.UK.2021-1.RLTS.T37364A185827725.en). Retrieved 31 October 2025.

1. Jimbo, T. (2021). "*Guioa oligotricha*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-3.RLTS.T37366A198307711.en](https://doi.org/10.2305/IUCN.UK.2021-3.RLTS.T37366A198307711.en). Retrieved 31 October 2025.

1. Energy Development Corporation (EDC) . (2021). "*Guioa palawanica*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-2.RLTS.T37365A153536128.en](https://doi.org/10.2305/IUCN.UK.2021-2.RLTS.T37365A153536128.en). Retrieved 31 October 2025.

1. Energy Development Corporation (EDC) . (2021). "*Guioa parvifoliola*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-2.RLTS.T37367A153536162.en](https://doi.org/10.2305/IUCN.UK.2021-2.RLTS.T37367A153536162.en). Retrieved 31 October 2025.

1. van Welzen, P.C. (1998). "*Guioa patentinervis*". Vol. 1998. [doi:10.2305/IUCN.UK.1998.RLTS.T37368A10046709.en](https://doi.org/10.2305/IUCN.UK.1998.RLTS.T37368A10046709.en). Retrieved 31 October 2025.

1. Jimbo, T. (2022). "*Guioa pauciflora*". Vol. 2022. [doi:10.2305/IUCN.UK.2022-1.RLTS.T37369A198307753.en](https://doi.org/10.2305/IUCN.UK.2022-1.RLTS.T37369A198307753.en). Retrieved 31 October 2025.

1. Lamei, P.L. (2021). "*Guioa plurinervis*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-1.RLTS.T37370A185827757.en](https://doi.org/10.2305/IUCN.UK.2021-1.RLTS.T37370A185827757.en). Retrieved 31 October 2025.

1. Energy Development Corporation (EDC) . (2021). "*Guioa reticulata*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-2.RLTS.T37371A153536194.en](https://doi.org/10.2305/IUCN.UK.2021-2.RLTS.T37371A153536194.en). Retrieved 31 October 2025.

1. Lamei, P.L. (2021). "*Guioa scalariformis*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-1.RLTS.T37372A185827798.en](https://doi.org/10.2305/IUCN.UK.2021-1.RLTS.T37372A185827798.en). Retrieved 31 October 2025.

1. Energy Development Corporation (EDC) . (2021). "*Guioa truncata*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-3.RLTS.T37373A153536226.en](https://doi.org/10.2305/IUCN.UK.2021-3.RLTS.T37373A153536226.en). Retrieved 31 October 2025.

1. Lamei, P.L. (2021). "*Guioa unguiculata*". Vol. 2021. [doi:10.2305/IUCN.UK.2021-1.RLTS.T37374A185827832.en](https://doi.org/10.2305/IUCN.UK.2021-1.RLTS.T37374A185827832.en). Retrieved 31 October 2025.

1. van Welzen, P.C. (1998). "*Guioa waigeoensis*". Vol. 1998. [doi:10.2305/IUCN.UK.1998.RLTS.T37356A10046255.en](https://doi.org/10.2305/IUCN.UK.1998.RLTS.T37356A10046255.en). Retrieved 31 October 2025.

## External links

- ["*Guioa* Cav."](https://bie.ala.org.au/species/http://id.biodiversity.org.au/node/apni/2904903). *Atlas of Living Australia*

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Adapted from the Wikipedia article [Guioa](https://en.wikipedia.org/wiki/Guioa) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Guioa?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.