Orchidoideae

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Orchidoideae
Orchis conica Mallorca 02.jpg
Neotinea tridentata subsp. commutata
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribes

See text

The Orchidoideae, or the orchidoid orchids, are a subfamily of the orchid family (Orchidaceae) that contains around 3630 species. [1] Species typically have a single (monandrous), fertile anther which is erect and basitonic.

Contents

Description

The subfamily Orchidoideae and the previously recognized subfamily Spiranthoideae are considered the closest allies in the natural group of the monandrous orchids because of several generally shared characters:

Taxonomy

Phylogeny of the Orchidoideae is volatile and still subject to change. [2] Historically, the Orchidoideae have been partitioned into up to 6 tribes, including Orchideae, Diseae, Cranichideae, Chloraeeae, Diurideae, and Codonorchideae. However, the most recent molecular phylogenetics analysis led by Chase et al. in 2015 and subsequently by Chen et al. in 2017 indicates that the Orchidoideae should be split into 4 tribes: the Orchideae, Cranichideae, Diurideae, and Codonorchideae. [2] [3] [4]

Codonorchideae

This monophyletic tribe consists of only one genus, Codonorchis , found in South America. [2]

Codonorchis lessonii, native to Chile Codonorchis lessonii-flor.jpg
Codonorchis lessonii , native to Chile

Cranichideae

This cosmopolitan tribe comprises 8 currently accepted subtribes. Molecular evidence suggests that the former Chloraeeae are sister to the rest of the Cranichideae. As such, the Chloraeeae are now considered a subtribe of the Cranichideae. [2] Moreover, based on morphological and genetic evidence, the genus Discyphus was elevated out of the Spiranthinae to form its own monophyletic subtribe, the Discyphinae. [2]

Ponthieva racemosa, a member of the Cranichidinae Ponthieva racemosa (Orchidaceae).JPG
Ponthieva racemosa , a member of the Cranichidinae
Cranichideae

Orchideae

Once divided into the Orchidinae and Habenariinae [3] (a nonsystematic paraphyletic splitting), the Orchideae now comprise 6 subtribes. [5] [4] Along with previous molecular studies, Chase et al's 2015 analysis confirmed that Diseae was a polyphyletic grouping. Consequently, the former subtribes of Diseae have been redistributed within the Orchideae (for instance, Satyrium is now classified in the Orchidinae). In his 2015 study Chase recommended further study of historically problematic genera in the former Diseae such as Huttonaea and Pachites. Further molecular analysis by Chen et al. in 2017 led to the following reorganization: [2] [4]

Brachycorythis, a member of the Orchidinae Davidraju IMG 5828.jpg
Brachycorythis , a member of the Orchidinae

Diurideae

The Diurideae, a predominantly Australasian tribe, retain their previous subtribal organization and comprise 9 taxa: [2]

Diuris setacea, a member of the Diuridinae Diuris setacea - Bristly donkey orchid (8035569990).jpg
Diuris setacea , a member of the Diuridinae

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The taxonomy of the Orchidaceae (orchid family) has evolved slowly during the last 250 years, starting with Carl Linnaeus who in 1753 recognized eight genera. De Jussieu recognized the Orchidaceae as a separate family in his Genera Plantarum in 1789. Olof Swartz recognized 25 genera in 1800. Louis Claude Richard provided us in 1817 with the descriptive terminology of the orchids. (See External links below). The next step was taken in 1830-1840 by John Lindley, who recognized four subfamilies. He is generally recognized as the father of orchid taxonomy. The next important step was taken by George Bentham with a new classification, recognizing subtribes for the first time. This classification was first presented in a paper that Bentham read to the Royal Society in 1881. Then it was published in 1883 in the final volume of Genera Plantarum. The next great contributors were Pfitzer (1887), Schlechter (1926), Mansfeld (1937), Dressler and Dodson (1960), Garay (1960, 1972), Vermeulen (1966), again Dressler (1981). and Burns-Balogh and Funk (1986). Dressler's 1993 book had considerable influence on later work.

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<span class="mw-page-title-main">Orchideae</span> Tribe of orchids

Orchideae is a tribe of orchids in the subfamily Orchidoideae. Historically, it was divided into 2 subtribes, Orchidinae and Habenariinae. The subtribe Orchidinae alone contains about 1,800 species. However, although some phylogenetic studies have established the monophyly of the subtribes, the generic boundaries are unclear, with many genera as traditionally circumscribed being paraphyletic or even polyphyletic. Species of genera such as Habenaria and Platanthera have been placed into both subtribes. A 2017 molecular phylogenetic study found that both subtribes did form clades, but did not formally recognize Habenariinae, because of missing genera and uncertainty over generic boundaries. The Asian species of Orchideae, in particular, have been subject to repeated changes of generic placement from 2012 onwards.

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Diseae is an orchid tribe in the subfamily Orchidoideae. It was recognized in Genera Orchidacearum volume 2, which was published in 2001. It consisted of 12 genera in five subtribes. In molecular phylogenetic studies that were published after 1999, it was shown that Diseae is paraphyletic over the tribe Orchideae. In a classification of orchids that was published in 2015, Diseae was not recognized, but was instead placed in synonymy under Orchideae.

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References

  1. "Types of Orchids: A Visual Compendium". FTD.com. 1 March 2018. Retrieved 11 December 2021.
  2. 1 2 3 4 5 6 7 Chase, Mark W.; Cameron, Kenneth M. (2015). "An updated classification of Orchidaceae". Botanical Journal of the Linnean Society. 177 (2): 151–174 via Oxford Academic.
  3. 1 2 RICHARD M. BATEMAN; PETER M. HOLLINGSWORTH; JILLIAN PRESTON; LUO YI-BO; ALEC M. PRIDGEON; MARK W. CHASE (May 2003). "Molecular phylogenetics and evolution of Orchidinae and selected Habenariinae (Orchidaceae)". Botanical Journal of the Linnean Society. 142 (1). doi: 10.1046/j.1095-8339.2003.00157.x .
  4. 1 2 3 Chen, Gui-Zhen; Huang, Jie; Zhang, Guo-Qiang; Ma, Liang; Chen, Shi-Pin (2017-11-28). "New subtribe Pachitinae (Orchideae) of Orchidaceae: Evidence from morphological and molecular analyses". Phytotaxa. 329 (2): 114. doi:10.11646/phytotaxa.329.2.2. ISSN   1179-3163.
  5. Jin, Wei-Tao; Schuiteman, André; Chase, Mark W.; Li, Jian-Wu; Chung, Shih-Wen; Hsu, Tian-Chuan; Jin, Xiao-Hua (2017). "Phylogenetics of subtribe Orchidinae s.l. (Orchidaceae; Orchidoideae) based on seven markers (plastid matK, psaB, rbcL, trnL-F, trnH-psba, and nuclear nrITS, Xdh): implications for generic delimitation". BMC Plant Biology. 17: 222.