Difference between revisions of "Quercus arkansana"

Sargent

Trees & Shrubs 2: 121. 1911.

Common names: Arkansas oak
EndemicSelected by author to be illustrated
Synonyms: Species Ashe
Treatment appears in FNA Volume 3.
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--><span class="statement" id="st-d0_s0" data-properties="tree duration;tree some measurement"><b>Trees,</b> deciduous, to 15 m.</span> <span class="statement" id="st-d0_s1" data-properties="bark coloration;ridge length or size;ridge pubescence or relief;ridge arrangement;furrow depth"><b>Bark </b>black with long rough ridges separated by deep furrows.</span> <span class="statement" id="st-d0_s2" data-properties="twig diameter;twig pubescence;twig pubescence"><b>Twigs </b>1.5-3 mm diam., gray-pubescent, rarely glabrate.</span> <span class="statement" id="st-d0_s3" data-properties="terminal bud coloration;terminal bud shape;terminal bud some measurement;terminal bud pubescence;terminal bud pubescence;scale architecture or pubescence or shape"><b>Terminal </b>buds redbrown, ovoid, 2-5 mm, glabrous or with scales somewhat ciliate on margins, especially at apex.</span> <span class="statement" id="st-d0_s4" data-properties="petiole some measurement;petiole pubescence;petiole pubescence"><b>Leaves:</b> petiole 5-25 mm, pubescent, rarely glabrate.</span> <span class="statement" id="st-d0_s5" data-properties="leaf-blade shape;leaf-blade shape;leaf-blade shape;leaf-blade shape;leaf-blade length;leaf-blade width;base shape;base shape;base shape;margin architecture or shape;margin architecture or shape;lobe quantity;lobe depth;lobe quantity;apex shape;apex shape;apex shape"><b>Leaf-</b>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;</span> <span class="statement" id="st-d0_s6" data-properties="surface pubescence;surface pubescence;surface pubescence;axillary tuft prominence;vein prominence;vein shape;vein relief;hair quantity;hair duration">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.</span> <span class="statement" id="st-d0_s7" data-properties="acorn duration"><b>Acorns </b>biennial;</span> <span class="statement" id="st-d0_s8" data-properties="cup width;cup depth;cup shape;cup width;cup width;nut quantity;outer surface pubescence;inner surface pubescence;scale tip fixation or orientation;scale tip shape">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;</span> <span class="statement" id="st-d0_s9" data-properties="nut shape;nut shape;nut shape;nut length;nut width;nut pubescence;scar diam">nut broadly ellipsoid to subglobose, 10-15 × 9-15 mm, puberulent, scar diam. 5-10 mm.</span><!--
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--><span class="statement" id="st-undefined" data-properties=""><b>Trees,</b> deciduous, to 15 m. <b>Bark</b> black with long rough ridges separated by deep furrows. <b>Twigs</b> 1.5-3 mm diam., gray-pubescent, rarely glabrate. <b>Terminal</b> buds red-brown, ovoid, 2-5 mm, glabrous or with scales somewhat ciliate on margins, especially at apex. <b>Leaves</b>: petiole 5-25 mm, pubescent, rarely glabrate. <b>Leaf</b> 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. <b>Acorns</b> 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.</span><!--
  
 
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|publication year=1911
 
|publication year=1911
 
|special status=Endemic;Selected by author to be illustrated
 
|special status=Endemic;Selected by author to be illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V3/V3_1078.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V3/V3_1078.xml
 
|genus=Quercus
 
|genus=Quercus
 
|section=Quercus sect. Lobatae
 
|section=Quercus sect. Lobatae
 
|species=Quercus arkansana
 
|species=Quercus arkansana
|acorn duration=biennial
 
|apex shape=broadly obtuse;rounded
 
|axillary tuft prominence=conspicuous
 
|bark coloration=black
 
|base shape=acute;cordate
 
|cup depth=shallow
 
|cup shape=saucer--shaped
 
|cup width=×10-16;5mm;9mm
 
|furrow depth=deep
 
|hair duration=persistent
 
|hair quantity=few
 
|inner surface pubescence=pubescent
 
|leaf-blade length=50mm;150mm
 
|leaf-blade shape=rhombic;obovate or obtrullate
 
|leaf-blade width=35mm;100mm
 
|lobe depth=shallow
 
|lobe quantity=0;10
 
|margin architecture or shape=with 2-3 shallow lobes;entire
 
|nut length=10mm;15mm
 
|nut pubescence=puberulent
 
|nut quantity=1/4;1/2
 
|nut shape=broadly ellipsoid;subglobose
 
|nut width=9mm;15mm
 
|outer surface pubescence=puberulent
 
|petiole pubescence=glabrate;pubescent
 
|petiole some measurement=5mm;25mm
 
|ridge arrangement=separated
 
|ridge length or size=long
 
|ridge pubescence or relief=rough
 
|scale architecture or pubescence or shape=ciliate
 
|scale tip fixation or orientation=appressed
 
|scale tip shape=acute
 
|scar diam=5mm;10mm
 
|surface pubescence=abaxially uniformly pubescent;glabrous
 
|terminal bud coloration=redbrown
 
|terminal bud pubescence=with scales;glabrous
 
|terminal bud shape=ovoid
 
|terminal bud some measurement=2mm;5mm
 
|tree duration=deciduous
 
|tree some measurement=0m;15m
 
|twig diameter=1.5mm;3mm
 
|twig pubescence=glabrate;gray-pubescent
 
|vein prominence=prominent
 
|vein relief=rugose
 
|vein shape=planar
 
 
}}<!--
 
}}<!--
  
 
-->[[Category:Treatment]][[Category:Quercus sect. Lobatae]]
 
-->[[Category:Treatment]][[Category:Quercus sect. Lobatae]]

Revision as of 13:31, 27 July 2019

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.


Phenology: Flowering spring.
Habitat: An understory tree of well-drained, sandy soils, on ravine heads (pocosins, steepheads)
Elevation: 50-150 m

Distribution

V3 1078-distribution-map.gif

Ala., Ark., Fla., Ga., La., Tex.

Discussion

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.

Selected References

None.

Lower Taxa

None.
... more about "Quercus arkansana"
Kevin C. Nixon +
Sargent +
Arkansas oak +
Ala. +, Ark. +, Fla. +, Ga. +, La. +  and Tex. +
50-150 m +
An understory tree of well-drained, sandy soils, on ravine heads (pocosins, steepheads) +
Flowering spring. +
Trees & Shrubs +
Endemic +  and Selected by author to be illustrated +
Species +
Quercus arkansana +
Quercus sect. Lobatae +
species +