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Huerteales
	Perrottetia sandwicensis
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Clade:	Malvids
Order:	Huerteales; Doweld
Families
	Dipentodontaceae; Gerrardinaceae; Petenaeaceae; Tapisciaceae;

Huerteales is the botanical name for an order of flowering plants.^[2] It is one of the 17 orders that make up the large eudicot group known as the rosids in the APG III system of plant classification.^[1]^[3] Within the rosids, it is one of the orders in Malvidae,^[4] a group formerly known as eurosids II and now known informally as the malvids. This is true whether Malvidae is circumscribed broadly to include eight orders as in APG III, or more narrowly to include only four orders.^[1] Huerteales consists of four small families, Petenaeaceae, Gerrardinaceae, Tapisciaceae, and Dipentodontaceae.^[5]

Petenaeaceae consists of a single genus and species Petenaea cordata from Southern Mexico, Guatemala and Belize.^[6]

Gerrardinaceae consists of a single genus, Gerrardina.^[7] Tapisciaceae has two genera, Tapiscia and Huertea.^[8]^[9]

Until 2006, Dipentodontaceae was treated as consisting of a single genus, Dipentodon.^[10] Since that time, some authors have included Perrottetia in Dipentodontaceae, even though no formal revision of the family has been published as of 2008.^[11] Thus the order Huerteales consists of six genera. The largest genus, Perrottetia, contains about 15 of the approximate total of 25 species in the order.^[12]

The Huerteales are shrubs or small trees found in most tropical or warm temperate regions. The flowers of Perrottetia have been studied in detail,^[13] but otherwise, all five of the genera are poorly known. The order is based on molecular phylogenetic analysis of DNA sequences.

Description

All of the Huerteales are woody plants. The leaves are alternate with toothed margins. The inflorescence is cymose, but sometimes nearly racemose or umbelliform. The bases of the calyx, corolla and stamens are fused to form a hypanthium which is in some cases very short. The ovary is unilocular, at least at the top, with one or two ovules per carpel. The number of carpels is variable.

Other characters are generally found in Huerteales, but with the exceptions noted below. Gerrardina differs from the rest of Huerteales in that the stamens are opposite the petals, instead of being opposite the sepals. Dipentodon and Perrottetia are distinctive in that the calyx and corolla are not well differentiated, but resemble each other. Tapiscia and Huertea have a calyx tube and compound, rather than simple leaves. Tapiscia has a uniloculate ovary with a single ovule.^[9] Huertea has one locule containing two ovules, or two locules, each containing one ovule.^[8] Gerrardina, Dipentodon, and Perrottetia have two ovules in each locule. Tapiscia lacks the nectary disk that is characteristic of the order. Huertea lacks stipules.

History

Until the first decade of the twenty-first century, the five genera of Huerteales had usually been placed into three unrelated families. Tapiscia and Huertea had long been known to be related. Most authors had placed them in Staphyleaceae and had placed that family in the order Sapindales. Armen Takhtajan established the family Tapisciaceae in 1987 and placed it in Sapindales, but this treatment was not followed by many others and it did not stand up to phylogenetic analysis. Since that time, Staphyleaceae has been recircumscribed. It no longer includes Tapiscia and Huertea ^[14] and it is in the order Crossosomatales.^[15]

For most of the twentieth century, Gerrardina and Dipentodon had usually been placed in Flacourtiaceae, a family that is now recognized by only a few taxonomists, and then only as a segregate of Salicaceae.^[16]^[17] Perrottetia, meanwhile, had usually been placed, with considerable doubt, in Celastraceae.^[18]

Ever since Dipentodon was named in 1911, there had been occasional suggestions that it might be related to Tapiscia and Huertea.^[5] In 2001, Alexander Doweld established the order Huerteales,^[19] defining it to consist of Tapiscia, Huertea, and Dipentodon.^[20] This grouping was later supported by molecular phylogenetic studies.^[5] In 2006, a study of DNA sequences showed that Perrottetia was misplaced in Celastrales and that it is sister to Dipentodon in Huerteales.^[18] Also in 2006, it was found that Gerrardina is a malvid, but its placement within this group remained uncertain.^[7]

In 2009, Andreas Worberg and co-authors produced the first phylogenetic study that included all of the genera of Huerteales. From one of their data matrices, they derived a well supported phylogeny for the order, as well as strongly supported relationships among the four orders of malvids.^[5]

Phylogeny

The phylogeny shown below is the one found by Worberg and co-authors. Monospecific genera are represented by species names.

Sapindales

Huerteales

	Petenaea cordata

	Gerrardina

	Tapiscia sinensis

	Huertea

	Dipentodon sinicus

	Perrottetia

	Brassicales

	Malvales

References

^ ^a ^b ^c Angiosperm 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.
^ Peter F. Stevens (2001 onwards). "Huerteales". In: Angiosperm Phylogeny Website. In: Missouri Botanical Garden Website. (see External links below)
^ Hengchang Wang, Michael J. Moore, Pamela S. Soltis, Charles D. Bell, Samuel F. Brockington, Roolse Alexandre, Charles C. Davis, Maribeth Latvis, Steven R. Manchester, and Douglas E. Soltis (10 Mar 2009), "Rosid radiation and the rapid rise of angiosperm-dominated forests", Proceedings of the National Academy of Sciences, 106 (10): 3853–3858, Bibcode:2009PNAS..106.3853W, doi:10.1073/pnas.0813376106, PMC 2644257, PMID 19223592{{citation}}: CS1 maint: multiple names: authors list (link)
^ Philip D. Cantino, James A. Doyle, Sean W. Graham, Walter S. Judd, Richard G. Olmstead, Douglas E. Soltis, Pamela S. Soltis, and Michael J. Donoghue (2007), "Towards a phylogenetic nomenclature of Tracheophyta" (PDF), Taxon, 56 (3): 822–846, doi:10.2307/25065865, JSTOR 25065865, archived from the original on July 5, 2008{{citation}}: CS1 maint: multiple names: authors list (link)
^ ^a ^b ^c ^d Andreas Worberg, Mac H. Alford, Dietmar Quandt, and Thomas Borsch. 2009. "Huerteales sister to Brassicales plus Malvales, and newly circumscribed to include Dipentodon, Gerrardina, Huertea, Perrottetia, and Tapiscia. Taxon 58(2):468-478.
^ Christenhusz, M. J. M., Fay, M. F., Clarkson, J. J., Gasson, P., Morales Can, J., Jiménez Barrios, J. B. & Chase, M. W. (2010). Petenaeaceae, a new angiosperm family in Huerteales with a distant relationship to Gerrardina (Gerrardinaceae). Botanical Journal of the Linnean Society 164: 16–25.
^ ^a ^b Mac H. Alford. 2006. "Gerrardinaceae: a new family of African flowering plants unresolved among Brassicales, Huerteales, Malvales, and Sapindales." Taxon 55(4):959-964.
^ ^a ^b Klaus Kubitzki. 2003. "Tapisciaceae" pages 369-370. In: Klaus Kubitski and Clemens Bayer (editors). The Families and Genera of Vascular Plants volume V. Springer-Verlag: Berlin;Heidelberg, Germany.
^ ^a ^b Dezhu Li, Jie Cai, and Wen Jun. 2008. "Tapisciaceae" page 496. In: Zhengyi Wu, Peter H. Raven, and Deyuan Hong (editors). Flora of China volume 11. Science Press: Beijing, China; Missouri Botanical Garden Press: St. Louis, Missouri, USA.
^ Vernon H. Heywood, Richard K. Brummitt, Ole Seberg, and Alastair Culham. Flowering Plant Families of the World. Firefly Books: Ontario, Canada. (2007).
^ Jinshuang Ma and Bruce Bartholomew. 2008. "Dipentodontaceae" pages 494-495. In: Zhengyi Wu, Peter H. Raven, and Deyuan Hong (editors). Flora of China volume 11. Science Press: Beijing, China; Missouri Botanical Garden Press: St. Louis, Missouri, USA.
^ Mark P. Simmons. 2004. "Celastraceae" page 50. In: Klaus Kubitzki (editor). The Families and Genera of Vascular Plants volume VI. Springer-Verlag: Berlin;Heidelberg, Germany.
^ Merran L. Matthews and Peter K. Endress (2005). "Comparative floral structure and systematics in Celastrales". Botanical Journal of the Linnean Society 149(2):129-194
^ Sarah L. Simmons. 2007. "Staphyleaceae" pages 440-445. In: Klaus Kubitzki (editor). The Families and Genera of Vascular Plants volume IX. Springer-Verlag: Berlin;Heidelberg, Germany.
^ Sang-Hun Oh and Daniel Potter. 2006. "Description and Phylogenetic Position of a New Angiosperm Family, Guamatelaceae, Inferred from Chloroplast rbcL, atpB, and matK Sequences." Systematic Botany 31(4):730-738.
^ Mark W. Chase, Sue Zmarzty, M. Dolores Lledó, Kenneth J. Wurdack, Susan M. Swensen, and Michael F. Fay. 2002. "When in doubt, put it in Flacourtiaceae: a molecular phylogenetic analysis based on plastid rbcL DNA sequences." Kew Bulletin 57(1):141-181.
^ Sue Zmarzty et alii. (in press). "Salicaceae" In: The Families and Genera of Vascular Plants. Springer-Verlag: Berlin;Heidelberg, Germany.
^ ^a ^b Li-Bing Zhang and Mark P. Simmons (2006). "Phylogeny and Delimitation of the Celastrales Inferred from Nuclear and Plastid Genes". Systematic Botany 31(1):122-137.
^ James L. Reveal. 2008 onward. "A Checklist of Family and Suprafamilial Names for Extant Vascular Plants." At: Home page of James L. Reveal and C. Rose Broome. (see External links below).
^ Alexander B. Doweld. 2001. Tentamen Systematis Plantarum Vascularium (Tracheophyta).: xxxv. 23 Dec 2001.

External links

[APGIII2009-1] Angiosperm 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.

[huerteales-2] Peter F. Stevens (2001 onwards). "Huerteales". In: Angiosperm Phylogeny Website. In: Missouri Botanical Garden Website. (see External links below)

[wang2009-3] Hengchang Wang, Michael J. Moore, Pamela S. Soltis, Charles D. Bell, Samuel F. Brockington, Roolse Alexandre, Charles C. Davis, Maribeth Latvis, Steven R. Manchester, and Douglas E. Soltis (10 Mar 2009), "Rosid radiation and the rapid rise of angiosperm-dominated forests", Proceedings of the National Academy of Sciences, 106 (10): 3853–3858, Bibcode:2009PNAS..106.3853W, doi:10.1073/pnas.0813376106, PMC 2644257, PMID 19223592{{citation}}: CS1 maint: multiple names: authors list (link)

[cantino2007-4] Philip D. Cantino, James A. Doyle, Sean W. Graham, Walter S. Judd, Richard G. Olmstead, Douglas E. Soltis, Pamela S. Soltis, and Michael J. Donoghue (2007), "Towards a phylogenetic nomenclature of Tracheophyta" (PDF), Taxon, 56 (3): 822–846, doi:10.2307/25065865, JSTOR 25065865, archived from the original on July 5, 2008{{citation}}: CS1 maint: multiple names: authors list (link)

[worberg2009-5] Andreas Worberg, Mac H. Alford, Dietmar Quandt, and Thomas Borsch. 2009. "Huerteales sister to Brassicales plus Malvales, and newly circumscribed to include Dipentodon, Gerrardina, Huertea, Perrottetia, and Tapiscia. Taxon 58(2):468-478.

[6] Christenhusz, M. J. M., Fay, M. F., Clarkson, J. J., Gasson, P., Morales Can, J., Jiménez Barrios, J. B. & Chase, M. W. (2010). Petenaeaceae, a new angiosperm family in Huerteales with a distant relationship to Gerrardina (Gerrardinaceae). Botanical Journal of the Linnean Society 164: 16–25.

[alford2006-7] Mac H. Alford. 2006. "Gerrardinaceae: a new family of African flowering plants unresolved among Brassicales, Huerteales, Malvales, and Sapindales." Taxon 55(4):959-964.

[kubitzki2003-8] Klaus Kubitzki. 2003. "Tapisciaceae" pages 369-370. In: Klaus Kubitski and Clemens Bayer (editors). The Families and Genera of Vascular Plants volume V. Springer-Verlag: Berlin;Heidelberg, Germany.

[li2008-9] Dezhu Li, Jie Cai, and Wen Jun. 2008. "Tapisciaceae" page 496. In: Zhengyi Wu, Peter H. Raven, and Deyuan Hong (editors). Flora of China volume 11. Science Press: Beijing, China; Missouri Botanical Garden Press: St. Louis, Missouri, USA.

[heywood2007-10] Vernon H. Heywood, Richard K. Brummitt, Ole Seberg, and Alastair Culham. Flowering Plant Families of the World. Firefly Books: Ontario, Canada. (2007).

[ma2008-11] Jinshuang Ma and Bruce Bartholomew. 2008. "Dipentodontaceae" pages 494-495. In: Zhengyi Wu, Peter H. Raven, and Deyuan Hong (editors). Flora of China volume 11. Science Press: Beijing, China; Missouri Botanical Garden Press: St. Louis, Missouri, USA.

[simmons2004-12] Mark P. Simmons. 2004. "Celastraceae" page 50. In: Klaus Kubitzki (editor). The Families and Genera of Vascular Plants volume VI. Springer-Verlag: Berlin;Heidelberg, Germany.

[matthews2005-13] Merran L. Matthews and Peter K. Endress (2005). "Comparative floral structure and systematics in Celastrales". Botanical Journal of the Linnean Society 149(2):129-194

[simmons2007-14] Sarah L. Simmons. 2007. "Staphyleaceae" pages 440-445. In: Klaus Kubitzki (editor). The Families and Genera of Vascular Plants volume IX. Springer-Verlag: Berlin;Heidelberg, Germany.

[oh2006-15] Sang-Hun Oh and Daniel Potter. 2006. "Description and Phylogenetic Position of a New Angiosperm Family, Guamatelaceae, Inferred from Chloroplast rbcL, atpB, and matK Sequences." Systematic Botany 31(4):730-738.

[chase2002-16] Mark W. Chase, Sue Zmarzty, M. Dolores Lledó, Kenneth J. Wurdack, Susan M. Swensen, and Michael F. Fay. 2002. "When in doubt, put it in Flacourtiaceae: a molecular phylogenetic analysis based on plastid rbcL DNA sequences." Kew Bulletin 57(1):141-181.

[zmarzty-17] Sue Zmarzty et alii. (in press). "Salicaceae" In: The Families and Genera of Vascular Plants. Springer-Verlag: Berlin;Heidelberg, Germany.

[zhang2006-18] Li-Bing Zhang and Mark P. Simmons (2006). "Phylogeny and Delimitation of the Celastrales Inferred from Nuclear and Plastid Genes". Systematic Botany 31(1):122-137.

[reveal2008on-19] James L. Reveal. 2008 onward. "A Checklist of Family and Suprafamilial Names for Extant Vascular Plants." At: Home page of James L. Reveal and C. Rose Broome. (see External links below).

[doweld2001-20] Alexander B. Doweld. 2001. Tentamen Systematis Plantarum Vascularium (Tracheophyta).: xxxv. 23 Dec 2001.

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PROFILPELAJAR.COM

Huerteales

Description

History

Phylogeny

References

External links

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