# Psidium

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{{Short description|Genus of flowering plants in the family Myrtaceae}}
{{For|the thoroughbred racehorse|Psidium (horse)}}
{{Automatic taxobox
| oldest_fossil = Paleogene
| image = Starr 020803-0117 Psidium guajava.jpg
| image_caption = Guava (''[Psidium guajava](/source/Psidium_guajava)'')
| display_parents = 2
| taxon = Psidium
| authority = [L.](/source/Carl_Linnaeus)<ref name="GRIN">{{cite web |url=http://www.ars-grin.gov/cgi-bin/npgs/html/genus.pl?10034 |title=Genus: ''Psidium'' L. |work=Germplasm Resources Information Network |publisher=United States Department of Agriculture
|date=2009-01-27 |access-date=2010-03-03}}</ref>
|subdivision_ranks = Species
|subdivision = ''See text''
|subdivision_ref = <ref name="powo">{{cite web |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:30004423-2 |title=''Psidium'' L. |website=Plants of the World Online |publisher=Royal Botanic Gardens, Kew |year=2026 |access-date=7 March 2026}}</ref>
| synonyms = 
* ''Calyptropsidium'' <small>O.Berg</small>
* ''Corynemyrtus'' <small>(Kiaersk.) Mattos</small>
* ''Cuiavus'' <small>Trew</small>
* ''Episyzygium'' <small>Suess. & A.Ludw.</small>
* ''Guajava'' <small>Mill.</small>
* ''Guayaba'' <small>Noronha</small>
* ''Mitranthes'' <small>O.Berg</small>
* ''Mitropsidium'' <small>Burret</small>
| synonyms_ref = <ref name = powo/>
}}

'''''Psidium''''' is a [genus](/source/genus) of trees and shrubs in the family [Myrtaceae](/source/Myrtaceae). It is native to warmer parts of the [Western Hemisphere](/source/Western_Hemisphere) (Mexico, Central and South America, the West Indies, and the [Galápagos Islands](/source/Gal%C3%A1pagos_Islands)).{{R|powo}} Many of the species bear edible fruits, and for this reason several are cultivated commercially.<ref>{{cite book |title= The Encyclopedia of Fruit and Nuts |editor= Jules Janick, Robert E. Paull |edition= illustrated |publisher= CABI |year= 2008 |isbn= 9780851996387}}</ref> The most popularly cultivated species is the common [guava](/source/guava), ''[Psidium guajava](/source/Psidium_guajava).''

==Taxonomy==
[[File:Leaves of Psidium.jpg|thumb|new leaves of Psidium in [West Bengal](/source/West_Bengal), India.]]
This genus was described first by Linnaeus in 1753.<ref name="LINNAEUS">{{cite book |last1=Linnaeus |first1=Carl |title=Species plantarum |date=1753 |publisher=Laurentii Salvii |location=Stockholm |page=470 |url=https://www.biodiversitylibrary.org/page/358489}}</ref>

Fossils are known from the [Paleogene](/source/Paleogene) of Patagonia.<ref>{{Cite journal |last=Panti |first=Carolina |date=2016-05-18 |title=Myrtaceae fossil leaves from the Río Turbio Formation (Middle Eocene), Santa Cruz Province, Argentina |url=http://www.tandfonline.com/doi/full/10.1080/08912963.2014.976635 |journal=Historical Biology |language=en |volume=28 |issue=4 |pages=459–469 |doi=10.1080/08912963.2014.976635 |bibcode=2016HBio...28..459P |s2cid=84988707 |issn=0891-2963|hdl=11336/19131 |hdl-access=free |url-access=subscription }}</ref>

==Species==
{{As of|2026|03}}, [Plants of the World Online](/source/Plants_of_the_World_Online) accepts the following 70 species:{{R|powo}}

{{columns-list|colwidth=22em|
*''[Psidium acidum](/source/Psidium_acidum)'' {{small|(Mart. ex DC.) Landrum}}
*''[Psidium acranthum](/source/Psidium_acranthum)'' {{small|Urb.}}
*''[Psidium acutangulum](/source/Psidium_acutangulum)'' {{small|DC.}}
*''[Psidium albescens](/source/Psidium_albescens)'' {{small|Urb.}}
*''[Psidium amplexicaule](/source/Psidium_amplexicaule)'' {{small|Pers.}}
*''[Psidium appendiculatum](/source/Psidium_appendiculatum)'' {{small|Kiaersk.}}
*''[Psidium araucanum](/source/Psidium_araucanum)'' {{small|Soares-Silva & Proença}}
*''[Psidium australe](/source/Psidium_australe)'' {{small|Cambess.}}
*''[Psidium bahianum](/source/Psidium_bahianum)'' {{small|Landrum & Funch}}
*''[Psidium brevipedunculatum](/source/Psidium_brevipedunculatum)'' {{small|Tuler & Landrum}}
*''[Psidium brownianum](/source/Psidium_brownianum)'' {{small|Mart. ex DC.}}
*''[Psidium cattleyanum](/source/Psidium_cattleyanum)'' {{small|Sabine}}
*''[Psidium cauliflorum](/source/Psidium_cauliflorum)'' {{small|Landrum & Sobral}}
*''[Psidium decussatum](/source/Psidium_decussatum)'' {{small|DC.}}
*''[Psidium densicomum](/source/Psidium_densicomum)'' {{small|Mart. ex DC.}}
*''[Psidium firmum](/source/Psidium_firmum)'' {{small|O.Berg}}
*''[Psidium friedrichsthalianum](/source/Psidium_friedrichsthalianum)'' {{small|(O.Berg) Nied.}}
*''[Psidium fulvum](/source/Psidium_fulvum)'' {{small|McVaugh}}
*''[Psidium ganevii](/source/Psidium_ganevii)'' {{small|Landrum & Funch}}
*''[Psidium glaziovianum](/source/Psidium_glaziovianum)'' {{small|Kiaersk.}}
*''[Psidium grandifolium](/source/Psidium_grandifolium)'' {{small|Mart. ex DC.}}
*''[Psidium grazielae](/source/Psidium_grazielae)'' {{small|Tuler & M.C.Souza}}
*''[Psidium guajava](/source/Psidium_guajava)'' {{small|L.}}
*''[Psidium guayaquilense](/source/Psidium_guayaquilense)'' {{small|Landrum & Cornejo}}
*''[Psidium guineense](/source/Psidium_guineense)'' {{small|Sw.}}
*''[Psidium guyanense](/source/Psidium_guyanense)'' {{small|Pers.}}
*''[Psidium harrisianum](/source/Psidium_harrisianum)'' {{small|Urb.}}
*''[Psidium huanucoense](/source/Psidium_huanucoense)'' {{small|Landrum}}
*''[Psidium inaequilaterum](/source/Psidium_inaequilaterum)'' {{small|O.Berg}}
*''[Psidium itanareense](/source/Psidium_itanareense)'' {{small|O.Berg}}
*''[Psidium jacquinianum](/source/Psidium_jacquinianum)'' {{small|(O.Berg) Mattos}}
*''[Psidium kennedyanum](/source/Psidium_kennedyanum)'' {{small|Morong}}
*''[Psidium langsdorffii](/source/Psidium_langsdorffii)'' {{small|O.Berg}}
*''[Psidium laruotteanum](/source/Psidium_laruotteanum)'' {{small|Cambess.}}
*''[Psidium longipetiolatum](/source/Psidium_longipetiolatum)'' {{small|D.Legrand}}
*''[Psidium maribense](/source/Psidium_maribense)'' {{small|Mart. ex DC.}}
*''[Psidium minutifolium](/source/Psidium_minutifolium)'' {{small|Krug & Urb.}}
*''[Psidium misionum](/source/Psidium_misionum)'' {{small|D.Legrand}}
*''[Psidium montanum](/source/Psidium_montanum)'' {{small|Sw.}}
*''[Psidium myrsinites](/source/Psidium_myrsinites)'' {{small|DC.}}
*''[Psidium myrtoides](/source/Psidium_myrtoides)'' {{small|O.Berg}}
*''[Psidium nannophyllum](/source/Psidium_nannophyllum)'' {{small|Alain}}
*''[Psidium nummularia](/source/Psidium_nummularia)'' {{small|(C.Wright ex Griseb.) C.Wright}}
*''[Psidium nutans](/source/Psidium_nutans)'' {{small|O.Berg}}
*''[Psidium oblongatum](/source/Psidium_oblongatum)'' {{small|O.Berg}}
*''[Psidium occidentale](/source/Psidium_occidentale)'' {{small|Landrum & Parra-Os.}}
*''[Psidium oligospermum](/source/Psidium_oligospermum)'' {{small|Mart. ex DC.}}
*''[Psidium ovale](/source/Psidium_ovale)'' {{small|(Spreng.) Burret}}
*''[Psidium parvifolium](/source/Psidium_parvifolium)'' {{small|Griseb.}}
*''[Psidium pedicellatum](/source/Psidium_pedicellatum)'' {{small|McVaugh}}
*''[Psidium pigmeum](/source/Psidium_pigmeum)'' {{small|Arruda}}
*''[Psidium pulcherrimum](/source/Psidium_pulcherrimum)'' {{small|Tuler & C.M.Costa}}
*''[Psidium raimondii](/source/Psidium_raimondii)'' {{small|Burret}}
*''[Psidium ratterianum](/source/Psidium_ratterianum)'' {{small|Proença & Soares-Silva}}
*''[Psidium rhombeum](/source/Psidium_rhombeum)'' {{small|O.Berg}}
*''[Psidium riparium](/source/Psidium_riparium)'' {{small|Mart. ex DC.}}
*''[Psidium robustum](/source/Psidium_robustum)'' {{small|O.Berg}}
*''[Psidium rostratum](/source/Psidium_rostratum)'' {{small|McVaugh}}
*''[Psidium rotundatum](/source/Psidium_rotundatum)'' {{small|Griseb.}}
*''[Psidium rotundidiscum](/source/Psidium_rotundidiscum)'' {{small|Proença & Tuler}}
*''[Psidium rufum](/source/Psidium_rufum)'' {{small|Mart. ex DC.}}
*''[Psidium rutidocarpum](/source/Psidium_rutidocarpum)'' {{small|Ruiz & Pav. ex G.Don}}
*''[Psidium salutare](/source/Psidium_salutare)'' {{small|(Kunth) O.Berg}}
*''[Psidium schenckianum](/source/Psidium_schenckianum)'' {{small|Kiaersk.}}
*''[Psidium sessiliflorum](/source/Psidium_sessiliflorum)'' {{small|(Landrum) Proença & Tuler}}
*''[Psidium sobralianum](/source/Psidium_sobralianum)'' {{small|Landrum & Proença}}
*''[Psidium sorocabense](/source/Psidium_sorocabense)'' {{small|O.Berg}}
*''[Psidium striatulum](/source/Psidium_striatulum)'' {{small|DC.}}
*''[Psidium suffruticosum](/source/Psidium_suffruticosum)'' {{small|O.Berg}}
*''[Psidium urquiolanum](/source/Psidium_urquiolanum)'' {{small|Landrum & Z.Acosta}}
}}

==References==
{{wikispecies}}
{{commonscat}}
{{Reflist}}

{{Taxonbar|from=Q320179}}
{{Authority control}}

Category:Psidium
Category:Myrtaceae genera
Category:Botanical taxa named by Carl Linnaeus
Category:Flora of the Neotropical realm

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