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Arkansas Oak

Quercus arkansana Sarg.

Comments

provided by eFloras
Quercus arkansana reportedly hybridizes with Q . incana (= Q . × venulosa Ashe) and Q . nigra (D. M. Hunt 1986; W. H. Duncan and M. B. Duncan 1988). While agreeing that an isotype of the former clearly indicated a relationship to Q . arkansana , E. J. Palmer (1948) questioned the identity of the second parent and noted that venulosa is a homonym of a fossil species. In addition, D. M. Hunt (1989) cited evidence of hybridization with Q . hemisphaerica , Q . laevis , Q . marilandica , Q . myrtifolia , and either Q . falcata or Q . velutina .
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 3 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Description

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Trees , deciduous, to 15 m. Bark black with long rough ridges separated by deep furrows. Twigs 1.5-3 mm diam., gray-pubescent, rarely glabrate. Terminal buds red-brown, ovoid, 2-5 mm, glabrous or with scales somewhat ciliate on margins, especially at apex. Leaves: petiole 5-25 mm, pubescent, rarely glabrate. Leaf blade rhombic to obovate or obtrullate, 50-150 × 35-100 mm, base acute to cordate, margins entire or with 2-3 shallow lobes and up to 10 awns, apex broadly obtuse to rounded; surfaces abaxially uniformly pubescent to glabrous except for conspicuous axillary tufts of tomentum, veins prominent, adaxially planar or somewhat rugose with a few persistent hairs near base. Acorns biennial; cup thin, shallow goblet- to almost saucer-shaped, 5-9 mm high × 10-16 mm wide, covering 1/4-1/2 nut, outer surface puberulent, inner surface sparsely to uniformly pubescent, scale tips appressed, acute; nut broadly ellipsoid to subglobose, 10-15 × 9-15 mm, puberulent, scar diam. 5-10 mm.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 3 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
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eFloras

Distribution

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Ala., Ark., Fla., Ga., La., Tex.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 3 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
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eFloras

Flowering/Fruiting

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Flowering spring.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 3 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
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eFloras.org
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eFloras

Habitat

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An understory tree of well-drained, sandy soils, on ravine heads (pocosins, steepheads); 50-150m.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 3 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
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eFloras.org
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Synonym

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Quercus caput-rivuli Ashe
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 3 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
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eFloras

Quercus arkansana

provided by wikipedia EN

Quercus arkansana, the Arkansas oak, is a species of oak tree. It is native to the southeastern United States (eastern Texas, southern Arkansas, Louisiana, Mississippi, Alabama, Georgia, and the Florida Panhandle).[3] It is threatened by use of its habitat for pine plantations, clearing of land, and diebacks that may be caused by drought.

Description

Quercus arkansana is a deciduous tree growing up to 15 meters (49 feet) tall. The bark is black. The leaves are sometimes unlobed and sometimes with 2 or 3 shallow lobes.[4]

Habitat

Quercus arkansana is shade-loving tree that grows in the understories of mesic pine forests and southern hardwood stands, and it is frequently reported from sandhills, the upper portions of ravines, steepheads, and above the heads of small streams.[1] It is rarely a dominant component of the vegetation, except for a few places in Arkansas and Florida where it is found in large stands. It grows alongside Pinus taeda, P. echinata and other pines, as well as other oaks such as Quercus nigra, Q. pagoda, Q. margarettae, and Q. hemisphaerica. It grows among various other hardwoods including Nyssa sylvatica, Liquidambar styraciflua, Vaccinium arboreum, Sassafras albidum, Magnolia grandiflora, and Diospyros virginiana. It has been observed to form hybrids between Q. arkansana and Q. nigra in Georgia, and introgression from Q. falcata has been observed in Texas.[1]

References

  1. ^ a b c Jerome, D.; Wenzell, K.; Kenny, L. (2017). "Quercus arkansana". IUCN Red List of Threatened Species. 2017: e.T30953A88108282. doi:10.2305/IUCN.UK.2017-2.RLTS.T30953A88108282.en. Retrieved 15 November 2021.
  2. ^ "Quercus arkansana Sarg.". World Checklist of Selected Plant Families. Royal Botanic Gardens, Kew – via The Plant List. Note that this website has been superseded by World Flora Online
  3. ^ "Quercus arkansana". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  4. ^ Nixon, Kevin C. (1997). "Quercus arkansana". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 3. New York and Oxford – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
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Quercus arkansana: Brief Summary

provided by wikipedia EN

Quercus arkansana, the Arkansas oak, is a species of oak tree. It is native to the southeastern United States (eastern Texas, southern Arkansas, Louisiana, Mississippi, Alabama, Georgia, and the Florida Panhandle). It is threatened by use of its habitat for pine plantations, clearing of land, and diebacks that may be caused by drought.

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