Malvaceae: Difference between revisions
Corrected number of species. |
|||
| Line 23: | Line 23: | ||
}} |
}} |
||
The '''Malvaceae''', or the '''mallows''', are a family of [[flowering plant]]s containing over |
The '''Malvaceae''', or the '''mallows''', are a family of [[flowering plant]]s containing over 243 genera with close to 4225-4300 species.<ref name:"Judd">Judd & al.</ref> Well-known members of this family include [[okra]], [[cotton]], and [[Theobroma cacao|cacao]]. The largest genera in terms of number of species include ''[[Hibiscus]]'' (300 species), ''[[Sterculia]]'' (250 species), ''[[Dombeya]]'' (225 species), ''[[Pavonia (plant)|Pavonia]]'' (200 species), and ''[[Sida (plant)|Sida]]'' (200 species{{Verify source|date=November 2007}}<!--- genus article say only half --->). |
||
==Taxonomy and nomenclature== |
==Taxonomy and nomenclature== |
||
Revision as of 19:12, 12 July 2014
| Malvaceae | |
|---|---|
| |
| Least mallow, Malva parviflora | |
| Scientific classification | |
| Kingdom: | |
| (unranked): | |
| (unranked): | |
| (unranked): | |
| Order: | |
| Family: | Malvaceae |
| Subfamilies | |
|
Bombacoideae | |
The Malvaceae, or the mallows, are a family of flowering plants containing over 243 genera with close to 4225-4300 species.[2] Well-known members of this family include okra, cotton, and cacao. The largest genera in terms of number of species include Hibiscus (300 species), Sterculia (250 species), Dombeya (225 species), Pavonia (200 species), and Sida (200 species[verification needed]).
Taxonomy and nomenclature
The circumscription of the Malvaceae is very controversial. The traditional Malvaceae sensu stricto comprise a very homogeneous and cladistically monophyletic group. Another major circumscription, Malvaceae sensu lato, has been more recently defined on the basis that molecular techniques have shown the commonly recognised families Bombacaceae, Tiliaceae, and Sterculiaceae, which have always been considered closely allied to Malvaceae s.s., are not monophyletic groups. Thus, the Malvaceae can be expanded to include all of these families so as to compose a monophyletic group. Adopting this circumscription, the Malvaceae incorporate a much larger number of genera.
This article is based on the second circumscription, as presented by the Angiosperm Phylogeny Website.[3] The Malvaceae s.l. (hereafter simply "Malvaceae") comprise nine subfamilies. A tentative cladogram of the family is shown below. The diamond denotes a poorly supported branching (<80%).
| |||||||||||||||||||||||||||||||||||||
It is important to point out the relationships between these subfamilies are still either poorly supported or almost completely obscure, so the circumscription of the family may change dramatically as new studies are published.
If looking for information about the traditional Malvaceae s.s., we recommend referring to Malvoideae, the subfamily that approximately corresponds to that group.
The English common name 'mallow' (also applied to other members of Malvaceae) comes from Latin malva (also the source for the English word "mauve"). Malva itself was ultimately derived from the word for the plant in ancient Mediterranean languages.[4] Cognates of the word include Ancient Greek μαλάχη (malákhē) or μολόχη (molókhē), Modern Greek μολόχα (molóha), modern Arabic: ملوخية (mulukhiyah) and modern Hebrew: מלוחיה (molokhia).[4][5]
Description
Most species are herbs or shrubs, but some are trees and lianas.
Leaves and stems
Leaves are generally alternate, often palmately lobed or compound and palmately veined. The margin may be entire, but when dentate, a vein ends at the tip of each tooth (malvoid teeth). Stipules are present. The stems contain mucous canals and often also mucous cavities. Hairs are common, and are most typically stellate.
Flowers
The flowers are commonly borne in definite or indefinite axillary inflorescences, which are often reduced to a single flower, but may also be cauliflorous, oppositifolious, or terminal. They often bear supernumerary bracts. They can be unisexual or bisexual, and are generally actinomorphic, often associated with conspicuous bracts, forming an epicalyx. They generally have five valvate sepals, most frequently basally connate, with five imbricate petals. The stamens are five to numerous, and connate at least at their bases, but often forming a tube around the pistils. The pistils are composed of two to many connate carpels. The ovary is superior, with axial placentation, with capitate or lobed stigma. The flowers have nectaries made of many tightly packed glandular hairs, usually positioned on the sepals.
Fruits
The fruits are most often loculicidal capsules, schizocarps or nuts.
Pollination
Self-pollination is often avoided by means of protandry. Most species are entomophilous (pollinated by insects).
Importance
A number of species are pests in agriculture, including Abutilon theophrasti and Modiola caroliniana, and others that are garden escapes. Cotton (four species of Gossypium), kenaf (Hibiscus cannabinus), cacao, kola nut, and okra (Abelmoschus esculentus) are important agricultural crops. The fruit and leaves of baobabs are edible, as is the fruit of the durian.
See also
- Florissantia, an extinct Cenozoic genus
References
- ^ Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III" (PDF). Botanical Journal of the Linnean Society. 161 (2): 105–121. doi:10.1111/j.1095-8339.2009.00996.x. Retrieved 2013-07-06.
- ^ Judd & al.
- ^ Angiosperm Phylogeny Website
- ^ a b Douglas Harper. "mallow". Online Etymology Dictionary. Retrieved February 3, 2012.
- ^ Khalid. "Molokheya: an Egyptian National Dish". THe Baheyeldin Dynasty. Retrieved September 10, 2011.
- Baum, D. A., W. S. Alverson, and R. Nyffeler (1998). "A durian by any other name: taxonomy and nomenclature of the core Malvales". Harvard Papers in Botany. 3: 315–330.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.3732/ajb.91.11.1863, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with
|doi=10.3732/ajb.91.11.1863instead. - Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1006/bojl.1998.0226, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with
|doi=10.1006/bojl.1998.0226instead. - Bayer, C. and K. Kubitzki 2003. Malvaceae, pp. 225–311. In K. Kubitzki (ed.), The Families and Genera of Vascular Plants, vol. 5, Malvales, Capparales and non-betalain Caryophyllales.
- Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1111/j.1469-8137.1935.tb06834.x, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with
|doi=10.1111/j.1469-8137.1935.tb06834.xinstead. - Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.2307/2807839, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with
|doi=10.2307/2807839instead. - Judd, W. S., C. S. Campbell, E. A. Kellogg and P. F. Stevens. Plant Systematics: A Phylogenetic Approach.
- Maas, P. J. M. and L. Y. Th. Westra. 2005. Neotropical Plant Families (3rd edition).
- Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1080/00173130410000730, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with
|doi=10.1080/00173130410000730instead. - Tate, J. A., J. F. Aguilar, S. J. Wagstaff, J. C. La Duke, T. A. Bodo Slotta and B. B. Simpson (2005). "Phylogenetic relationships within the tribe Malveae (Malvaceae, subfamily Malvoideae) as inferred from ITS sequence data". American Journal of Botany. 92 (4): 584–602. doi:10.3732/ajb.92.4.584. PMID 21652437.
{{cite journal}}: CS1 maint: multiple names: authors list (link) (abstract online here).
External links
- Malvaceae in Topwalks
- Alverson, William S., Barbara A. Whitlock, Reto Nyffeler, Clemens Bayer and David A. Baum. 1999. Phylogeny of the core Malvales: evidence from ndhF sequence data. American Journal of Botany 86: 1474-1486.
- Core Malvales from Tree of Life
- Malvaceae: plants of Hawaii (image gallery) from HEAR
- Malvaceae Gallery
- Malvaceae of Mongolia in FloraGREIF