Difference between revisions of "Quercus margarettae"

(Ashe) J. K. Small

in J. K. Small, Fl. S.E. U.S., 355. 1903.

Common names: Sand post oak dwarf post oak
EndemicSelected by author to be illustrated
Basionym: Variety Ashe
Synonyms: Variety (Ashe) Sargent
Treatment appears in FNA Volume 3.
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--><span class="statement" id="st-d0_s0" data-properties="tree size;tree duration;tree some measurement;tree architecture;shrub size;shrub duration;shrub some measurement;shrub architecture"><b>Small </b>trees or shrubs, deciduous, to 12 m, sometimes rhizomatous.</span> <span class="statement" id="st-d0_s1" data-properties="bark coloration;bark architecture or pubescence"><b>Bark </b>light gray, scaly.</span> <span class="statement" id="st-d0_s2" data-properties="twig coloration;twig coloration;twig coloration;twig diameter;twig diameter;twig pubescence"><b>Twigs </b>green or reddish, becoming gray, 1-2 (-3) mm diam., glabrous.</span> <span class="statement" id="st-d0_s3" data-properties="bud coloration;bud shape;bud atypical some measurement;bud some measurement;apex shape;apex pubescence;apex pubescence;apex pubescence"><b>Buds </b>reddish-brown, ovoid, 2-3 (-6) mm, apex obtuse, sparsely pubescent to glabrate.</span> <span class="statement" id="st-d0_s4" data-properties="petiole atypical some measurement;petiole some measurement"><b>Leaves:</b> petiole 3-10 (-15) mm.</span> <span class="statement" id="st-d0_s5" data-properties="leaf-blade shape;leaf-blade shape;leaf-blade shape;leaf-blade atypical length;leaf-blade atypical length;leaf-blade length;leaf-blade atypical width;leaf-blade width;base shape;base shape;base shape;margin shape;lobe shape;lobe shape;lobe position;lobe position;lobe quantity;lobe architecture;lobe arrangement;pattern shape;secondary-vein quantity;apex shape"><b>Leaf-</b>blade obovate to narrowly obovate, (25-) 40-80 (-135) × 20-40 (-80) mm, base cuneate to rounded-attenuate, margins moderately to deeply lobed, lobes rounded or spatulate, sometimes middle or distal 2 lobes compound, with secondary lobe on proximal side, divergent at right angles, forming cruciform pattern, secondary-veins 3-5 on each side, apex broadly rounded;</span> <span class="statement" id="st-d0_s6" data-properties="surface coloration;surface orientation;surface pubescence;surface coloration;surface reflectance;surface pubescence;surface arrangement or shape;surface odor;hair arrangement or shape">surfaces abaxially light green, with interlocking, erect, 2-4 (-6) -rayed stellate hairs, velvety to touch, adaxially dark green, glossy, glabrous or sparsely stellate, not harsh to touch.</span> <span class="statement" id="st-d0_s7" data-properties="acorn quantity;acorn architecture;acorn architecture;peduncle some measurement"><b>Acorns </b>1-3, subsessile or on peduncle to 20 mm;</span> <span class="statement" id="st-d0_s8" data-properties="cup shape;cup shape;cup size;cup width;cup width;cup width;nut quantity;scale fixation or orientation;scale pubescence">cup deeply cupshaped, basally rounded or constricted, (7-) 9-12 mm deep × 12-20 mm wide, enclosing to 3/4 nut, scales loosely appressed, finely grayish-pubescent;</span> <span class="statement" id="st-d0_s9" data-properties="nut coloration;nut shape;nut atypical length;nut length;nut atypical width;nut width;nut pubescence">nut light-brown, ovoid, 15-25 (-30) × 9-13 (-16) mm, glabrous.</span> <span class="statement" id="st-d0_s10" data-properties="cotyledon fusion"><b>Cotyledons </b>distinct.</span><!--
+
--><span class="statement" id="st-undefined" data-properties=""><b>Small </b>trees or shrubs , deciduous, to 12 m, sometimes rhizomatous. <b>Bark</b> light gray, scaly. <b>Twigs</b> green or reddish, becoming gray, 1-2(-3) mm diam., glabrous. <b>Buds</b> reddish brown, ovoid, 2-3(-6) mm, apex obtuse, sparsely pubescent to glabrate. <b>Leaves</b>: petiole 3-10(-15) mm. <b>Leaf</b> blade obovate to narrowly obovate, (25-)40-80(-135) × 20-40(-80) mm, base cuneate to rounded-attenuate, margins moderately to deeply lobed, lobes rounded or spatulate, sometimes middle or distal 2 lobes compound, with secondary lobe on proximal side, divergent at right angles, forming cruciform pattern, secondary veins 3-5 on each side, apex broadly rounded; surfaces abaxially light green, with interlocking, erect, 2-4(-6)-rayed stellate hairs, velvety to touch, adaxially dark green, glossy, glabrous or sparsely stellate, not harsh to touch. <b>Acorns</b> 1-3, subsessile or on peduncle to 20 mm; cup deeply cup-shaped, basally rounded or constricted, (7-)9-12 mm deep × 12-20 mm wide, enclosing to 3/4 nut, scales loosely appressed, finely grayish pubescent; nut light brown, ovoid, 15-25(-30) × 9-13(-16) mm, glabrous. <b>Cotyledons</b> distinct.</span><!--
  
 
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|publication year=1903
 
|publication year=1903
 
|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_1039.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V3/V3_1039.xml
 
|genus=Quercus
 
|genus=Quercus
 
|section=Quercus sect. Quercus
 
|section=Quercus sect. Quercus
 
|species=Quercus margarettae
 
|species=Quercus margarettae
|acorn architecture=on peduncle;subsessile
 
|acorn quantity=1;3
 
|apex pubescence=sparsely pubescent;glabrate
 
|apex shape=rounded;obtuse
 
|bark architecture or pubescence=scaly
 
|bark coloration=light gray
 
|base shape=cuneate;rounded-attenuate
 
|bud atypical some measurement=3mm;6mm
 
|bud coloration=reddish-brown
 
|bud shape=ovoid
 
|bud some measurement=2mm;3mm
 
|cotyledon fusion=distinct
 
|cup shape=rounded;cup-shaped
 
|cup size=constricted
 
|cup width=×12-20;9mm;12mm
 
|hair arrangement or shape=stellate
 
|leaf-blade atypical length=80mm;135mm
 
|leaf-blade atypical width=40mm;80mm
 
|leaf-blade length=40mm;80mm
 
|leaf-blade shape=obovate;narrowly obovate
 
|leaf-blade width=20mm;40mm
 
|lobe architecture=compound
 
|lobe arrangement=divergent
 
|lobe position=distal;middle
 
|lobe quantity=2
 
|lobe shape=spatulate;rounded
 
|margin shape=lobed
 
|nut atypical length=25mm;30mm
 
|nut atypical width=13mm;16mm
 
|nut coloration=light-brown
 
|nut length=15mm;25mm
 
|nut pubescence=glabrous
 
|nut quantity=3/4
 
|nut shape=ovoid
 
|nut width=9mm;13mm
 
|pattern shape=cruciform
 
|peduncle some measurement=0mm;20mm
 
|petiole atypical some measurement=10mm;15mm
 
|petiole some measurement=3mm;10mm
 
|scale fixation or orientation=appressed
 
|scale pubescence=grayish-pubescent
 
|secondary-vein quantity=3;5
 
|shrub architecture=rhizomatous
 
|shrub duration=deciduous
 
|shrub size=small
 
|shrub some measurement=0m;12m
 
|surface arrangement or shape=stellate
 
|surface coloration=dark green;light green
 
|surface odor=not harsh
 
|surface orientation=erect
 
|surface pubescence=glabrous;velvety
 
|surface reflectance=glossy
 
|tree architecture=rhizomatous
 
|tree duration=deciduous
 
|tree size=small
 
|tree some measurement=0m;12m
 
|twig coloration=gray;reddish;green
 
|twig diameter=1mm;2mm
 
|twig pubescence=glabrous
 
 
}}<!--
 
}}<!--
  
 
-->[[Category:Treatment]][[Category:Quercus sect. Quercus]]
 
-->[[Category:Treatment]][[Category:Quercus sect. Quercus]]

Revision as of 14:30, 27 July 2019

Small trees or shrubs , deciduous, to 12 m, sometimes rhizomatous. Bark light gray, scaly. Twigs green or reddish, becoming gray, 1-2(-3) mm diam., glabrous. Buds reddish brown, ovoid, 2-3(-6) mm, apex obtuse, sparsely pubescent to glabrate. Leaves: petiole 3-10(-15) mm. Leaf blade obovate to narrowly obovate, (25-)40-80(-135) × 20-40(-80) mm, base cuneate to rounded-attenuate, margins moderately to deeply lobed, lobes rounded or spatulate, sometimes middle or distal 2 lobes compound, with secondary lobe on proximal side, divergent at right angles, forming cruciform pattern, secondary veins 3-5 on each side, apex broadly rounded; surfaces abaxially light green, with interlocking, erect, 2-4(-6)-rayed stellate hairs, velvety to touch, adaxially dark green, glossy, glabrous or sparsely stellate, not harsh to touch. Acorns 1-3, subsessile or on peduncle to 20 mm; cup deeply cup-shaped, basally rounded or constricted, (7-)9-12 mm deep × 12-20 mm wide, enclosing to 3/4 nut, scales loosely appressed, finely grayish pubescent; nut light brown, ovoid, 15-25(-30) × 9-13(-16) mm, glabrous. Cotyledons distinct.


Habitat: Deep sands and gravels, often in dense woods as understory or in open scrubland and pine barrens
Elevation: 0-600 m

Distribution

V3 1039-distribution-map.gif

Ala., Ark., Fla., Ga., La., Miss., Mo., N.C., Okla., S.C., Tex., Va.

Discussion

Historical records for Quercus margaretta exist for New York, but no current population is known there.

Populations of post oak in east Texas (the Cross Timbers region) on sands and gravels exhibit characteristics somewhat intermediate between Quercus stellata and Q. margaretta; most of the trees at those localities have leaves with abaxial surface similar to Q. margaretta, leaf shape more similar to Q. stellata, and twigs somewhat intermediate between the two species in diameter and varying from tightly pubescent to glabrate. Acorn characters tend toward Q. margaretta as well. These populations have been treated as Q. drummondii Liebmann, the Drummond post oak. Similar intermediates occur sporadically throughout the range of the post oaks in southeastern United States, but they do not form such continuous and morphologically stable populations; perhaps the Texas material is best treated as a nothospecies, Q. ×drummondii.

Selected References

None.

Lower Taxa

None.
... more about "Quercus margarettae"
Kevin C. Nixon +  and Cornelius H. Muller +
(Ashe) J. K. Small +
Variety +
Sand post oak +  and dwarf post oak +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, Mo. +, N.C. +, Okla. +, S.C. +, Tex. +  and Va. +
0-600 m +
Deep sands and gravels, often in dense woods as understory or in open scrubland and pine barrens +
in J. K. Small, Fl. S.E. U.S., +
Endemic +  and Selected by author to be illustrated +
Variety +
Quercus margarettae +
Quercus sect. Quercus +
species +