Pyxidanthera

Last updated

Pyxidanthera
Pyxidanthera barbulata BB-1913.png
Pyxidanthera barbulata
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Diapensiaceae
Genus: Pyxidanthera
Michx.
Species

Pyxidanthera is a genus of flowering plant in the family Diapensiaceae. Though often recongnized as two species, Pyxidanthera barbulata and Pyxidanthera brevifolia , these designations are not genetically or morphologically distinct [1] [2] . Furthermore, these two designated species were found to not be reciprocally monophyletic [3] [4] [5] .

Despite these findings, some flora still recognize these two species based on their range, habitat, and leaf morphology (size and pubescence) [4] [6] . However, these leaf morphology differences are directly related to habitat and moisture [7] . Despite the species designations being based on habitat and moisture, climatic niche differentiation is not found between the two species [8] . Therefore, these species designations are strictly based on range, despite the overlapping range of the two species. The most widespread species, Pyxidanthera barbulata , is native to the eastern United States, occurring on the coast from Long Island to New Jersey and Virginia to South Carolina. [9] [4] A second species of Pyxidanthera [10] called Pyxidanthera brevifolia , known only from North and South Carolina. [11]

Related Research Articles

<span class="mw-page-title-main">Ericales</span> Order of eudicot flowering plants

The Ericales are a large and diverse order of dicotyledons. Species in this order have considerable commercial importance including for tea, persimmon, blueberry, kiwifruit, Brazil nuts, argan, and azalea. The order includes trees, bushes, lianas, and herbaceous plants. Together with ordinary autophytic plants, the Ericales include chlorophyll-deficient mycoheterotrophic plants and carnivorous plants.

<span class="mw-page-title-main">Liliales</span> Order of monocot flowering plants, including lilies

Liliales is an order of monocotyledonous flowering plants in the Angiosperm Phylogeny Group and Angiosperm Phylogeny Web system, within the lilioid monocots. This order of necessity includes the family Liliaceae. The APG III system (2009) places this order in the monocot clade. In APG III, the family Luzuriagaceae is combined with the family Alstroemeriaceae and the family Petermanniaceae is recognized. Both the order Lililiales and the family Liliaceae have had a widely disputed history, with the circumscription varying greatly from one taxonomist to another. Previous members of this order, which at one stage included most monocots with conspicuous tepals and lacking starch in the endosperm are now distributed over three orders, Liliales, Dioscoreales and Asparagales, using predominantly molecular phylogenetics. The newly delimited Liliales is monophyletic, with ten families. Well known plants from the order include Lilium (lily), tulip, the North American wildflower Trillium, and greenbrier.

<span class="mw-page-title-main">Rosaceae</span> Rose family of flowering plants

Rosaceae, the rose family, is a medium-sized family of flowering plants that includes 4,828 known species in 91 genera.

<span class="mw-page-title-main">Saxifragales</span> Order of Eudicot flowering plants in the Superrosid clade

Saxifragales is an order of angiosperms, or flowering plants, containing 15 botanical families and around 100 genera, with nearly 2,500 species. Of the 15 families, many are small, with eight of them being monotypic. The largest family is the Crassulaceae (stonecrops), a diverse group of mostly succulent plants, with about 35 genera. Saxifragales are found worldwide, primarily in temperate to subtropical zones, rarely being encountered growing wild in the tropics; however, many species are now cultivated throughout the world as knowledge of plant husbandry has improved. They can be found in a wide variety of environments, from deserts to fully aquatic habitats, with species adapted to alpine, forested or fully-aquatic habitats. Many are epiphytic or lithophytic, growing on exposed cliff faces, on trees or on rocks, and not requiring a highly organic or nutrient-dense substrate to thrive.

<span class="mw-page-title-main">Magnoliaceae</span> Family of flowering plants

The Magnoliaceae are a flowering plant family, the magnolia family, in the order Magnoliales. It consists of two genera: Magnolia and Liriodendron.

<span class="mw-page-title-main">Cornales</span> Order of flowering plants

The Cornales are an order of flowering plants, early diverging among the asterids, containing about 600 species. Plants within the Cornales usually have four-parted flowers, drupaceous fruits, and inferior to half-inferior gynoecia topped with disc-shaped nectaries.

<span class="mw-page-title-main">Monocotyledon</span> Clade of flowering plants

Monocotyledons, commonly referred to as monocots, are grass and grass-like flowering plants (angiosperms), the seeds of which typically contain only one embryonic leaf, or cotyledon. They constitute one of the major groups into which the flowering plants have traditionally been divided; the rest of the flowering plants have two cotyledons and are classified as dicotyledons, or dicots.

<span class="mw-page-title-main">Araliaceae</span> Family of flowering plants

The Araliaceae are a family of flowering plants composed of about 43 genera and around 1500 species consisting of primarily woody plants and some herbaceous plants commonly called the ginseng family. The morphology of Araliaceae varies widely, but it is predominantly distinguishable based on its woody habit, tropical distribution, and the presence of simple umbels.

<span class="mw-page-title-main">Gekkonidae</span> Family of lizards

Gekkonidae is the largest family of geckos, containing over 950 described species in 62 genera. The Gekkonidae contain many of the most widespread gecko species, including house geckos (Hemidactylus), the tokay gecko (Gekko), day geckos (Phelsuma), the mourning gecko (Lepidodactylus), and dtellas (Gehyra). Gekkonid geckos occur globally and are particularly diverse in tropical areas. Many species of these geckos exhibit an adhering ability to surfaces through Van der Waals forces utilizing intermolecular forces between molecules of their setae and molecules of the surface they are on.

<span class="mw-page-title-main">Ulmaceae</span> Family of flowering plants

The Ulmaceae are a family of flowering plants that includes the elms, and the zelkovas. Members of the family are widely distributed throughout the north temperate zone, and have a scattered distribution elsewhere except for Australasia.

<i>Phyllocladus</i> Genus of plants

Phyllocladus, the celery pines, is a small genus of conifers, now usually placed in the family Podocarpaceae.Species occur mainly in New Zealand, Tasmania, and Malesia in the Southern Hemisphere, though P. hypophyllus ranges into the Philippines, a short way north of the equator.

<span class="mw-page-title-main">Pteridophyte</span> Group of plants that reproduce by spores

A pteridophyte is a vascular plant that reproduces by means of spores. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden.

<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.

<span class="mw-page-title-main">Diapensiaceae</span> Family of flowering plants

Diapensiaceae is a small family of flowering plants, which includes 15 species in 6 genera. The genera include Berneuxia Decne., Diapensia L., Galax Sims, Pyxidanthera Michx., Shortia Torr. & A.Gray, and Schizocodon Siebold & Zucc.. Members of this family have little economic importance; however, some members are cultivated by florists.

<span class="mw-page-title-main">Eudicots</span> Clade of flowering plants

The eudicots, Eudicotidae, or eudicotyledons are a clade of flowering plants (angiosperms) which are mainly characterized by having two seed leaves (cotyledons) upon germination. The term derives from dicotyledon. Previously, they were called tricolpates or non-magnoliid dicots by past authors. The current botanical terms were introduced in 1991, by evolutionary botanist James A. Doyle and paleobotanist Carol L. Hotton, to emphasize the later evolutionary divergence of tricolpate dicots from earlier, less specialized, dicots.

<i>Krameria</i> Genus of flowering plants

Krameria is the only genus in the Krameriaceae family, of which any of the approximately 18 species are commonly known as rhatany, ratany or rattany. Rhatany is also the name given to krameria root, a botanical remedy consisting of the dried root of para rhatany or Peruvian rhatany.

<i>Juniperus brevifolia</i> Species of conifer

Juniperus brevifolia, the Azores juniper, is a species of juniper, endemic to the Azores, where it occurs at altitudes of 240–800 metres, rarely up to 1,500 m (4,900 ft). It is closely related to Juniperus oxycedrus of the Mediterranean region and Juniperus cedrus of the neighboring Macaronesian islands. It is threatened by habitat loss.

Lepuropetalon is a genus of flowering plants in the family Celastraceae. Before it was placed in the family when it was defined by the Angiosperm Phylogeny Group's APG III system in 2009, it had been placed with Parnassia in the family Parnassiaceae, now usually treated as a segregate of Celastraceae. When their most recent revision of Angiosperm classification was published in 2016, it retained its position in the family Celastraceae. Lepuropetalon has only one species, Lepuropetalon spathulatum. It is a winter annual that is most abundant in eastern Texas and western Louisiana. From there, it occurs sporadically southward into Mexico, and eastward through the Atlantic and Gulf coastal plain, and rarely in the Piedmont Plateau, to North Carolina. It has a disjunct distribution. In addition to the area mentioned above, it is also found in Uruguay and central Chile.

<span class="mw-page-title-main">Sequoioideae</span> Subfamily of coniferous trees (redwoods)

Sequoioideae, commonly referred to as Redwoods, is a subfamily of coniferous trees within the family Cupressaceae, that range in the northern hemisphere. It includes the largest and tallest trees in the world. The trees in the subfamily are amongst the most notable trees in the world and are common ornamental trees. The subfamily reached its peak of dominance during the early Cenozoic.

<i>Milligania</i> Genus of plants

Milligania is a genus of native perennial plants containing five species which are all found in Tasmania:

References

  1. Godt, MJW; Hamrick, J (1995). "Low levels of allozyme differentiation between Pyxidanthera (pyxie‐moss) taxa (Diapensiaceae)". Plant Systematics and Evolution. 195: 159-168.
  2. Wall, Wade A.; Douglas, Norman A.; Xiang, Qiu-Yun Jenny; Hoffmann, William A.; Wentworth, Thomas R.; Hohmann, Matthew G. (6 September 2010). "Evidence for range stasis during the latter Pleistocene for the Atlantic Coastal Plain endemic genus, Pyxidanthera Michaux: EVIDENCE FOR RANGE STASIS IN THE GENUS PYXIDANTHERA". Molecular Ecology. 19 (19): 4302–4314. doi:10.1111/j.1365-294X.2010.04793.x.
  3. Gaynor, Michelle L.; Fu, Chao‐Nan; Gao, Lian‐Ming; Lu, Li‐Min; Soltis, Douglas E.; Soltis, Pamela S. (September 2020). "Biogeography and ecological niche evolution in Diapensiaceae inferred from phylogenetic analysis". Journal of Systematics and Evolution. 58 (5): 646–662. doi:10.1111/jse.12646.
  4. 1 2 3 Pyxidanthera barbulata. Archived 2011-10-26 at the Wayback Machine Center for Plant Conservation.
  5. Rönblom, K. and A. A. Anderberg. (2002). Phylogeny of Diapensiaceae based on molecular data and morphology. Systematic Botany 27(2) 383-95.
  6. Wells, B (1929). "A new pyxie from North Carolina". Journal of the Elisha Mitchell Scientific Society. 44: 238–239.
  7. Primack RB, RB; Wyatt, R (1975). "Variation and taxonomy of Pyxidanthera (Diapensiaceae)". Brittonia. 27: 115-118.
  8. Gaynor, Michelle L.; Fu, Chao‐Nan; Gao, Lian‐Ming; Lu, Li‐Min; Soltis, Douglas E.; Soltis, Pamela S. (September 2020). "Biogeography and ecological niche evolution in Diapensiaceae inferred from phylogenetic analysis". Journal of Systematics and Evolution. 58 (5): 646–662. doi:10.1111/jse.12646.
  9. Pyxidanthera barbulata. The Nature Conservancy.
  10. The Plant List
  11. Pyxidanthera brevifolia. Flora of North America.