View source for Quercus john-tuckeri

{{Treatment/ID
|accepted_name=Quercus john-tuckeri
|accepted_authority=Nixon & C. H. Muller
|publications={{Treatment/Publication
|title=Novon
|place=4: 391. 1994
|year=1994
}}
|common_names=Tucker oak;desert scrub oak
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Quercus turbinella subsp. californica
|authority=J. M. Tucker
|rank=subspecies
}}
|hierarchy=Fagaceae;Quercus;Quercus sect. Quercus;Quercus john-tuckeri
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Fagaceae]]</div><div class="higher-taxon"><small>genus</small>[[Quercus]]</div><div class="higher-taxon"><small>section</small>[[Quercus sect. Quercus]]</div><div class="higher-taxon"><small>species</small>[[Quercus john-tuckeri]]</div></div>
|volume=Volume 3
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism duration;whole_organism duration;whole_organism atypical some measurement;whole_organism some measurement;whole_organism growth form"><b>Shrubs,</b> subevergreen or evergreen, 1-3 (-5) m.</span> <span class="statement" id="st-d0_s1" data-properties="bark coloration;bark coloration;bark architecture or pubescence"><b>Bark </b>light gray or brown, scaly.</span> <span class="statement" id="st-d0_s2" data-properties="twig coloration;twig coloration;twig diameter;twig diameter;twig pubescence"><b>Twigs </b>yellowish or dingy gray, 1-1.5 (-2) mm diam., densely tomentulose.</span> <span class="statement" id="st-d0_s3" data-properties="bud coloration;bud shape;bud shape;bud atypical some measurement;bud some measurement;bud pubescence;margin architecture or pubescence or shape"><b>Buds </b>brown, ovoid or globose, 1.5-2 (-3) mm, glabrous except for ciliate margins of scales;</span> <span class="statement" id="st-d0_s4" data-properties="proximal scale coloration;proximal scale pubescence">proximal scales often yellowish puberulent.</span> <span class="statement" id="st-d0_s5" data-properties="petiole some measurement"><b>Leaves:</b> petiole 1-4 mm.</span> <span class="statement" id="st-d0_s6" data-properties="leaf-blade coloration;leaf-blade shape;leaf-blade shape;leaf-blade atypical length;leaf-blade atypical length;leaf-blade length;leaf-blade atypical width;leaf-blade atypical width;leaf-blade width;leaf-blade width;leaf-blade texture;leaf-blade fragility;base shape;base shape;base shape;margin shape;margin shape;secondary-vein atypical quantity;secondary-vein quantity;vein architecture;tooth quantity;apex shape;apex shape"><b>Leaf-</b>blade unicolored, elliptic or obovate, (10-) 15-30 (-40) × (8-) 10-15 (-20) mm, thick and leathery, often brittle, base truncate or rounded-attenuate, rarely subcordate, margins irregularly spinose-toothed, occasionally shallowly lobate, secondary-veins (3-) 4-7, often some veins branching near margin and passing into more than 1 tooth, apex acute or rounded;</span> <span class="statement" id="st-d0_s7" data-properties="surface coloration;surface coloration;surface coloration;surface coloration;surface coloration;surface coloration;surface density;hair arrangement or shape;hair diameter;hair count or density;hair arrangement;hair coloration;glandular-hair reflectance;glandular-hair coloration;hair arrangement or shape">surfaces abaxially waxy grayish, light green, or yellowish, sparse to moderately dense (8-) 10-12-rayed, (loosely) appressed-stellate hairs, often 0.2-0.5 mm diam., and sparse to crowded, yellowish, glandular-hairs, adaxially dull grayish, with stellate hairs, similar to abaxial surface.</span> <span class="statement" id="st-d0_s8" data-properties="acorn arrangement;acorn arrangement;acorn architecture"><b>Acorns </b>solitary or paired, subsessile;</span> <span class="statement" id="st-d0_s9" data-properties="cup shape;cup width;cup width;cup width;scale coloration;scale coloration;scale relief;scale pubescence">cup cupshaped or obconic to hemispheric, 5-7 mm deep × 10-15 mm wide, thin, scales whitish or yellowish, moderately or scarcely tuberculate, puberulent;</span> <span class="statement" id="st-d0_s10" data-properties="nut shape;nut shape;nut shape;nut shape;nut shape;nut some measurement;apex shape">nut fusiform, ovoid, or conic, 20-30 mm, apex acute.</span> <span class="statement" id="st-d0_s11" data-properties="cotyledon fusion"><b>Cotyledons </b>distinct.</span><!--

-->{{Treatment/Body
|habitat=Dry slopes, chaparral, pinyon and juniper woodlands, margins of oak woodlands and sagebrush
|elevation=900-2000 m
|distribution=Calif.
|discussion=<p>Dry slopes, chaparral, pinyon and juniper woodlands, margins of oak woodlands and sagebrush; 900-2000 m; Calif.</p><!--
--><p>Endemic to California, Quercus john-tuckeri occurs from Los Angeles County northward in the interior Coast Ranges and Sierra Foothills to the northern edge of Sacramento Valley.</p><!--
--><p>Quercus john-tuckeri bears some resemblance to both Q. turbinella and Q. berberidifolia. Quercus turbinella has pedunculate fruit and cordate leaf bases, however, and Q. berberidifolia has a glabrate adaxial leaf surface, substantially smaller stellate trichomes with fewer rays on the abaxial leaf surface, heavier tuberculate acorn cups, and blunt or rounded (instead of acute) acorns.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Quercus john-tuckeri
|authority=Nixon & C. H. Muller
|rank=species
|parent rank=section
|synonyms=Quercus turbinella subsp. californica
|basionyms=
|family=Fagaceae
|habitat=Dry slopes, chaparral, pinyon and juniper woodlands, margins of oak woodlands and sagebrush
|elevation=900-2000 m
|distribution=Calif.
|reference=None
|publication title=Novon
|publication year=1994
|special status=Endemic;Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V3/V3_701.xml
|genus=Quercus
|section=Quercus sect. Quercus
|species=Quercus john-tuckeri
|acorn architecture=subsessile
|acorn arrangement=paired;solitary
|apex shape=acute;rounded;acute
|bark architecture or pubescence=scaly
|bark coloration=brown;light gray
|base shape=subcordate;rounded-attenuate;truncate
|bud atypical some measurement=2mm;3mm
|bud coloration=brown
|bud pubescence=glabrous
|bud shape=globose;ovoid
|bud some measurement=1.5mm;2mm
|cotyledon fusion=distinct
|cup shape=obconic;hemispheric
|cup width=thin;×10-15;5mm;7mm
|glandular-hair coloration=grayish
|glandular-hair reflectance=dull
|hair arrangement=crowded
|hair arrangement or shape=stellate;appressed-stellate
|hair coloration=yellowish
|hair count or density=sparse
|hair diameter=0.2mm;0.5mm
|leaf-blade atypical length=30mm;40mm
|leaf-blade atypical width=15mm;20mm
|leaf-blade coloration=unicolored
|leaf-blade fragility=brittle
|leaf-blade length=15mm;30mm
|leaf-blade shape=obovate;elliptic
|leaf-blade texture=leathery
|leaf-blade width=thick;10mm;15mm
|margin architecture or pubescence or shape=ciliate
|margin shape=lobate;spinose-toothed
|nut shape=conic;ovoid;conic;ovoid;fusiform
|nut some measurement=20mm;30mm
|petiole some measurement=1mm;4mm
|proximal scale coloration=yellowish
|proximal scale pubescence=puberulent
|scale coloration=yellowish;whitish
|scale pubescence=puberulent
|scale relief=tuberculate
|secondary-vein atypical quantity=3;4
|secondary-vein quantity=4;7
|surface coloration=yellowish;light green;yellowish;light green;grayish;waxy
|surface density=sparse;moderately dense
|twig coloration=dingy gray;yellowish
|twig diameter=1mm;1.5mm
|twig pubescence=tomentulose
|vein architecture=branching
|whole_organism atypical some measurement=3m;5m
|whole_organism duration=evergreen;subevergreen
|whole_organism growth form=shrub
|whole_organism some measurement=1m;3m
}}<!--

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