Hesperocyparis

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Hesperocyparis
Cupressus macrocarpa Carmel Bay 1.jpg
Hesperocyparis macrocarpa , Monterey cypress
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnospermae
Division: Pinophyta
Class: Pinopsida
Order: Cupressales
Family: Cupressaceae
Subfamily: Cupressoideae
Genus: Hesperocyparis
Bartel & R.A. Price
Type species
Hesperocyparis macrocarpa
(Hartweg ex Gordon) Bartel & Price
Species

See text

Synonyms
  • Neocupressusde Laub. nom. superfl.

Hesperocyparis (western cypress) [1] is a genus of trees in the family Cupressaceae, containing North American species otherwise assigned to the genus Cupressus . [2] They are found throughout western North America. Only a few species have wide ranges, with most being restricted-range endemics.

Contents

Taxonomy

Members of Hesperocyparis were and still are placed in Cupressus by many authorities, but phylogenetic evidence supports a different affinity. A 2021 molecular study found Hesperocyparis to be the sister group to the genus Callitropsis (containing only the Nootka cypress), with this clade being sister to the Asian genus Xanthocyparis , containing only the Vietnamese golden cypress. The clade comprising all three genera was found to be sister to a clade containing Juniperus and Cupressus sensu stricto. [3] If Hesperocyparis and the other smaller genuses were reunited with Cupressus it may also require them to be merged into a larger genus including Juniperus . [4]

As of 2024 Hesperocyparis is listed as the correct classification by Plants of the World Online, [5] World Flora Online, [6] and the Gymnosperm Database. [7] There is disagreement about this classification, with some scientists continuing to use Cupressus in preference to Hesperocyparis. [8] [9]

At the species level there is also uncertainty as to the number of species. In part this is because the north west of Mexico has not been sufficiently surveyed to give enough information to definitively determine if a number of species there and in the southwestern United States are fully separate species or part of a species complex. [7]

Phylogeny

Stull et al. 2021 [10] [11]

Juniperus

Cupressus  s.l.

Cupressus s.s.

Xanthocyparis vietnamensis Farjon & Nguyên

Callitropsis nootkatensis (Don) Oersted

Hesperocyparis

H. bakeri (Jepson) Bartel (Modoc cypress)

H. macnabiana (Murray) Bartel (Macnab’s/Shasta cypress)

H. goveniana (Gordon) Bartel (Gowen cypress)

H. macrocarpa (Hartweg ex Gordon) Bartel (Monterey cypress)

H. sargentii Jepson (Sargent cypress)

H. glabra (Sudworth) Bartel (Smooth Arizona cypress)

H. arizonica (Greene) Bartel (Arizona cypress)

H. guadalupensis (Watson) Bartel (Guadalupe cypress)

H. montana (Wiggins) Bartel (San Pedro Martir cypress)

H. forbesii (Jepson) Bartel (Tecate cypress)

H. lusitanica (Miller) Bartel (Mexican cypress)

H. stephensonii (Jepson) Bartel (Cuyamaca cypress)

Additional species: [5]

Related Research Articles

<i>Cupressus</i> Several genera of evergreen conifers

Cupressus is one of several genera of evergreen conifers within the family Cupressaceae that have the common name cypress; for the others, see cypress. It is considered a polyphyletic group. Based on genetic and morphological analysis, the genus Cupressus is found in the subfamily Cupressoideae. The common name "cypress" comes via the Old French cipres from the Latin cyparissus, which is the latinisation of the Greek κυπάρισσος (kypárissos).

<i>Chamaecyparis</i> Genus of conifers

Chamaecyparis, common names cypress or false cypress, is a genus of conifers in the cypress family Cupressaceae, native to eastern Asia and to the western and eastern margins of the United States. The name is derived from the Greek khamai (χαμαί), meaning "on the earth", and kuparissos (κυπάρισσος) for "cypress".

<i>Callitropsis nootkatensis</i> Species of conifer

Callitropsis nootkatensis, formerly known as Cupressus nootkatensis, is a species of tree in the cypress family native to the coastal regions of northwestern North America. This species goes by many common names including: Nootka cypress, yellow cypress, Alaska cypress, Nootka cedar, yellow cedar, Alaska cedar, and Alaska yellow cedar. The specific epithet nootkatensis is derived from its discovery by Europeans on the lands of a First Nation of Canada, the Nuu-chah-nulth people of Vancouver Island, British Columbia, who were formerly referred to as the Nootka.

<i>Calocedrus</i> Genus of conifer trees

Calocedrus, the incense cedar, is a genus of coniferous trees in the cypress family Cupressaceae first described as a genus in 1873. Three species are native to eastern Asia and one to western North America.

<i>Dacrydium</i> Genus of conifers

Dacrydium is a genus of conifers belonging to the podocarp family Podocarpaceae. Sixteen species of evergreen dioecious trees and shrubs are presently recognized. The genus was first described by Solander in 1786, and formerly included many more species, which were divided into sections A, B, and C by Florin in 1931. The revisions of de Laubenfels and Quinn, reclassified the former section A as the new genus Falcatifolium, divided Section C into new genera Lepidothamnus, Lagarostrobos and Halocarpus, and retained Section B as genus Dacrydium.

Falcatifolium is a genus of conifers of the family Podocarpaceae. The genus includes evergreen dioecious shrubs and large trees of up to 36 metres (118 ft). Five species are presently recognized. The genus was first described by de Laubenfels in 1969, and is composed of species formerly classified in genus Dacrydium.

<i>Dacrycarpus</i> Genus of conifers

Dacrycarpus is a genus of conifers belonging to the family Podocarpaceae. The genus includes nine species of dioecious evergreen trees and shrubs to 55–60 metres (180–197 ft) in height.

<i>Halocarpus</i> Genus of conifers

Halocarpus is a genus of conifers of the family Podocarpaceae. The genus includes three closely related species of evergreen trees and shrubs, all endemic to New Zealand.

<i>Lepidothamnus</i> Genus of conifers

Lepidothamnus is a genus of conifers belonging to the podocarp family Podocarpaceae. The genus includes three species of dioecious or monoecious evergreen trees and shrubs, and creepers. L. intermedius and L. laxifolius are native to New Zealand. L. fonkii is native to the Magellanic subpolar forests ecoregion of southern Argentina and Chile, where it grows as a low shrub or creeper in moorlands and bogs.

<i>Xanthocyparis</i> Genus of conifers in the family Cupressaceae

Xanthocyparis is a genus of cypresses in the family Cupressaceae. As of August 2021, it has only one species, Xanthocyparis vietnamensis, native to Vietnam and southeast China. It is commonly known as the Vietnamese golden cypress. The Nootka cypress, Cupressus nootkatensis or Callitropsis nootkatensis, was also placed in the genus, but this has been rejected.

<i>Callitris</i> Genus of conifers

Callitris is a genus of coniferous trees in the Cupressaceae. There are 16 recognized species in the genus, of which 13 are native to Australia and the other three native to New Caledonia. Traditionally, the most widely used common name is cypress-pine, a name shared by some species of the closely related genus Actinostrobus.

<i>Actinostrobus</i> Genus of conifers

Actinostrobus is a genus of coniferous trees in the Cupressaceae. Common names include cypress, sandplain-cypress and cypress-pine, the last of these shared by the closely related genus Callitris.

<i>Libocedrus</i> Genus of conifers

Libocedrus is a genus of five species of coniferous trees in the cypress family Cupressaceae, native to New Zealand and New Caledonia. The genus is closely related to the South American genera Pilgerodendron and Austrocedrus, and the New Guinean genus Papuacedrus, both of which are included within Libocedrus by some botanists. These genera are rather similar to the Northern Hemisphere genera Calocedrus and Thuja: in earlier days, what is now Calocedrus was sometimes included in Libocedrus. They are much less closely related, as recently confirmed. The generic name means "teardrop cedar", apparently referring to drops of resin.

<i>Widdringtonia</i> Genus of conifers

Widdringtonia is a genus of coniferous trees in the Cupressaceae. The name was Austrian botanist Stephan Endlicher's way of honouring an early expert on the coniferous forests of Spain, Capt. Samuel Edward Widdrington (1787–1856). There are four species, all native to southern Africa, where they are known as cedars or African cypresses.

<i>Athrotaxis</i> Genus of conifers

Athrotaxis is a genus of two to three species of conifers in the cypress family, Cupressaceae. The genus is endemic to western Tasmania, where they grow in high-elevation temperate rainforests.

<i>Macrozamia</i> Genus of cycads in the family Zamiaceae

Macrozamia is a genus of around forty species of cycads, family Zamiaceae, all of which are endemic to Australia. Many parts of the plant have been utilised for food and material, most of which is toxic if not processed correctly.

<i>Cephalotaxus</i> Genus of conifers

Cephalotaxus, commonly called plum yew or cowtail pine, is a genus of conifers comprising 11 species, either considered the only member of the family Cephalotaxaceae, or in the Taxaceae when that family is considered in a broad sense. The genus is endemic to eastern Asia, though fossil evidence shows it had a wider Northern Hemisphere distribution in the past. The species are evergreen shrubs and small trees reaching 1.0–10 metres (3–33 ft) tall.

<i>Amentotaxus</i> Genus of conifers

Amentotaxus is a genus of conifers (catkin-yews) comprising five species, treated in either the Cephalotaxaceae, or in the Taxaceae when that family is considered in a broad sense. The genus is endemic to subtropical Southeast Asia, from Taiwan west across southern China to Assam in the eastern Himalaya, and south to Vietnam. The species are evergreen shrubs and small trees reaching 2–15 m tall.

<i>Lepidozamia</i> Genus of cycads in the family Zamiaceae

Lepidozamia is a genus of two species of cycad, both endemic to Australia. They are native to rainforest climates in eastern Queensland and eastern New South Wales. They have a diploid chromosome number of 2n = 18.

<i>Hesperocyparis montana</i> Species of conifer

Hesperocyparis montana, commonly known as the San Pedro Mártir cypress or San Pedro cypress, is a species of conifer. It is a tree native to the Sierra de San Pedro Mártir of Baja California state in northwestern Mexico.

References

  1. USDA, NRCS (n.d.). "Hesperocyparis". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 14 May 2015.
  2. Robert P. Adams, Jim A. Bartel & Robert A. Price (2009). "A new genus, Hesperocyparis, for the cypresses of the Western Hemisphere" (PDF). Phytologia . 91 (1): 160–185.
  3. Stull, Gregory W.; Qu, Xiao-Jian; Parins-Fukuchi, Caroline; Yang, Ying-Ying; Yang, Jun-Bo; Yang, Zhi-Yun; Hu, Yi; Ma, Hong; Soltis, Pamela S.; Soltis, Douglas E.; Li, De-Zhu (July 19, 2021). "Gene duplications and phylogenomic conflict underlie major pulses of phenotypic evolution in gymnosperms". Nature Plants. 7 (8): 1015–1025. doi:10.1038/s41477-021-00964-4. ISSN   2055-0278. PMID   34282286. S2CID   232282918.
  4. Christenhusz, Maarten J. M.; Fay, Michael F.; Chase, Mark W. (2017). Plants of the world : an illustrated encyclopedia of vascular plants. Richmond, Surrey, UK & Chicago, Illinois: Kew Publishing, Royal Botanic Gardens, Kew & The University of Chicago Press. p. 84. ISBN   978-1-84246-634-6 . Retrieved 18 February 2024.
  5. 1 2 "Hesperocyparis Bartel & R.A.Price". Plants of the World Online . Royal Botanic Gardens, Kew . Retrieved 30 January 2024.
  6. "Hesperocyparis Bartel & R.A.Price". World Flora Online . Retrieved 30 January 2024.
  7. 1 2 Earle, Christopher J. "Hesperocyparis (New World Cypresses) description". The Gymnosperm Database. Retrieved 30 January 2024.
  8. Michalet, Richard; Carcaillet, Christopher; Delerue, Florian; Domec, Jean-Christophe; Lenoir, Jonathan (19 December 2023). "Assisted migration in a warmer and drier climate: less climate buffering capacity, less facilitation and more fires at temperate latitudes?". Oikos. doi:10.1111/oik.10248. S2CID   266410521 . Retrieved 13 February 2024.
  9. Raddi, Paolo; Della Rocca, Gianni; Danti, Roberto (8 January 2020). "Cupressus glabra". In Stimm, B.; Roloff, A.; Lang, U.M.; Weisgerber, H. (eds.). Enzyklopädie der Holzgewächse: Handbuch und Atlas der Dendrologie /begründet von Peter Schütt. Andreas Roloff; Horst Weisgerber; Ulla M. Lang; Bernd Stimm. Weinheim: Wiley-VCH. ISBN   9783527321414.
  10. Stull, Gregory W.; Qu, Xiao-Jian; Parins-Fukuchi, Caroline; Yang, Ying-Ying; Yang, Jun-Bo; Yang, Zhi-Yun; Hu, Yi; Ma, Hong; Soltis, Pamela S.; Soltis, Douglas E.; Li, De-Zhu (July 19, 2021). "Gene duplications and phylogenomic conflict underlie major pulses of phenotypic evolution in gymnosperms". Nature Plants. 7 (8): 1015–1025. doi:10.1038/s41477-021-00964-4. ISSN   2055-0278. PMID   34282286. S2CID   236141481.
  11. Stull, Gregory W.; et al. (2021). "main.dated.supermatrix.tree.T9.tre". Figshare. doi:10.6084/m9.figshare.14547354.v1.