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Hydrangeaceae is a family of flowering plants in the order Cornales, with a wide distribution in Asia and North America, and locally in southeastern Europe.cite-ref-christenhusz-byng2016-3-0[3]

• Description

• Genera

• Phylogeny

• References

The genera are characterised by leaves in opposite pairs (rarely whorled or alternate), and regular, bisexual flowers with four (rarely 5–12) petals. The fruit is a capsule or berry containing several seeds, the seeds with a fleshy endosperm.cite-ref-4[4]

The following genera are accepted:cite-ref-77126637-1-5-0[5]

• Carpenteria Torr.

• Deutzia Thunb.

• Fendlera Engelm. & A.Gray

• Fendlerella A.Heller

• Hydrangea Gronov. ex L.

• Jamesia Torr. & A.Gray

• Kirengeshoma Yatabe

• Philadelphus L.

• Whipplea Torr.

The family Hydrangeaceae has two subfamilies, namely Jamesioideae and Hydrangeoideae. The subfamily Jamesioideae comprises the genera Jamesia and Fendlera.cite-ref-kim-et-al-2015-6-0[6]cite-ref-hufford-et-al-2001-7-0[7] They are the sister group to the remaining Hydrangeaceae.cite-ref-hufford-et-al-2001-7-1[7]cite-ref-kubitzki-2013-8-0[8] The subfamily Hydrangeoideae has two tribes:cite-ref-samain-et-al-2010-9-0[9]cite-ref-hufford-et-al-2001-7-2[7]cite-ref-kubitzki-2013-8-1[8] Hydrangeae consists of Hydrangea s.l.,cite-ref-samain-et-al-2010-9-1[9] and Philadelpheae consists of Philadelphus, Carpenteria, Deutzia, Kirengeshoma, Whipplea, and Fendlerella.cite-ref-hufford-et-al-2001-7-3[7]cite-ref-kubitzki-2013-8-2[8] Carpenteria is the sister group to Philadelphus. Deutzia is the sister group to Kirengeshoma, and Fendlerella is the sister group to Whipplea.cite-ref-kubitzki-2013-8-3[8]cite-ref-kim-et-al-2015-6-1[6]cite-ref-hufford-et-al-2001-7-4[7] However the relationships among those three clades within the tribe Philadelphae are a bit unclear.cite-ref-kubitzki-2013-8-4[8] The following cladogram summarizes results from different studies, and for each node it is noted which studies support the sister group positions of the following branches:

cite-note-apgiii2009-11. citerefangiosperm-phylogeny-group2009Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III". Botanical Journal of the Linnean Society. 161 (2): 105–121. doi:10.1111/j.1095-8339.2009.00996.x. hdl:10654/18083.

cite-note-grin-22. "Family: Hydrangeaceae Dumort., nom. cons". Germplasm Resources Information Network. United States Department of Agriculture. 2003-01-17. Retrieved 2012-07-31.

cite-note-christenhusz-byng2016-33. ↑ citerefchristenhusz-m-j-m-byng-j-w-2016Christenhusz, M. J. M.; Byng, J. W. (2016). "The number of known plants species in the world and its annual increase". Phytotaxa. 261 (3): 201–217. Bibcode:2016Phytx.261..201C. doi:10.11646/phytotaxa.261.3.1.

cite-note-44. ↑ "Hydrangeaceae - FNA". floranorthamerica.org. Retrieved 2023-06-20.

cite-note-77126637-1-55. ↑ "Hydrangeaceae Dumort". Plants of the World Online. Board of Trustees of the Royal Botanic Gardens, Kew. Retrieved 30 June 2021.

cite-note-kim-et-al-2015-66. ↑ Kim, C., Deng, T., Wen, J., Nie, Z. L., & Sun, H. (2015). "Systematics, biogeography, and character evolution of Deutzia (Hydrangeaceae) inferred from nuclear and chloroplast DNA sequences." Molecular Phylogenetics and Evolution, 87, 91-104.

cite-note-hufford-et-al-2001-77. ↑ Hufford, L., Moody, M. L., & Soltis, D. E. (2001). "A phylogenetic analysis of Hydrangeaceae based on sequences of the plastid gene matK and their combination with rbcL and morphological data." International Journal of Plant Sciences, 162(4), 835-846.

cite-note-kubitzki-2013-88. ↑ Kubitzki, K. (2013). "Flowering Plants. Dicotyledons: Celastrales, Oxalidales, Rosales, Cornales, Ericales." p. 206. Springer Berlin Heidelberg.

cite-note-samain-et-al-2010-99. ↑ Samain, M. S., Wanke, S., & Goetghebeur, P. (2010). "Unraveling extensive paraphyly in the genus Hydrangea s.l. with implications for the systematics of tribe Hydrangeeae." Systematic Botany, 35(3), 593-600.