Difference between revisions of "Quercus hypoleucoides"

A. Camus

Bull. Mus. Natl. Hist. Nat., sér. 2, 4: 124. 1932.

Common names: Silverleaf oak
Selected by author to be illustrated
Synonyms: Quercus hypoleuca Engelmann
Treatment appears in FNA Volume 3.
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|name=Quercus hypoleuca
 
|authority=Engelmann
 
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|elevation=1500-2700 m
 
|elevation=1500-2700 m
 
|distribution=Ariz.;N.Mex.;Tex.;n Mexico.
 
|distribution=Ariz.;N.Mex.;Tex.;n Mexico.
|discussion=<p>Quercus hypoleucoides reportedly hybridizes with Q. gravesii (Q. ×inconstans E. J. Palmer [= Q. livermorensis C. H. Muller]) (see C. H. Muller 1951). Several specimens from Pima County, Arizona, fall outside the range of typical Q. hypoleucoides, suggesting hybridization with the Mexican Q. mcvaughii Spellenberg (R. Spellenberg 1992).</p>
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|discussion=<p><i>Quercus hypoleucoides</i> reportedly hybridizes with <i>Q. gravesii</i> (Q. ×inconstans E. J. Palmer [= Q. livermorensis C. H. Muller]) (see C. H. Muller 1951). Several specimens from Pima County, Arizona, fall outside the range of typical <i>Q. hypoleucoides</i>, suggesting hybridization with the Mexican Q. mcvaughii Spellenberg (R. Spellenberg 1992).</p>
 
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|synonyms=Quercus hypoleuca
 
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|family=Fagaceae
 
|family=Fagaceae
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|publication year=1932
 
|publication year=1932
 
|special status=Selected by author to be illustrated
 
|special status=Selected by author to be illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V3/V3_863.xml
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V3/V3_863.xml
 
|genus=Quercus
 
|genus=Quercus
 
|section=Quercus sect. Lobatae
 
|section=Quercus sect. Lobatae

Revision as of 17:20, 18 September 2019

Trees or shrubs, evergreen, to 10 m. Bark black, deeply furrowed. Twigs dark reddish brown, 1.5-3 mm diam., pubescent. Terminal buds light chestnut brown, ovoid, 2.5-4.5 mm, glabrous except for ciliate scale margins, occasionally with tuft of hairs at apex. Leaves: petiole 1.5-13 mm, densely pubescent. Leaf blade narrowly ovate to ovate or elliptic, 45-120 × 15-40 mm, base cuneate to rounded, margins strongly revolute, entire or spinose with up to 11 awns, apex acute to attenuate; surfaces abaxially densely tawny- or white-tomentose, adaxially noticeably rugose, glabrous. Acorns annual or biennial; cup deeply saucer- or cup-shaped, 4.5-7 mm high × 6-13 mm wide, covering 1/3 nut or less, outer surface pubescent to sparsely puberulent, inner surface pubescent to floccose, scales appressed, blunt; nut ellipsoid to oblong, 8-16 × 5-10 mm, glabrous, scar diam. 2.5-5.5 mm.


Phenology: Flowering spring.
Habitat: Common in moist canyons and on ridges
Elevation: 1500-2700 m

Distribution

V3 863-distribution-map.gif

Ariz., N.Mex., Tex., n Mexico.

Discussion

Quercus hypoleucoides reportedly hybridizes with Q. gravesii (Q. ×inconstans E. J. Palmer [= Q. livermorensis C. H. Muller]) (see C. H. Muller 1951). Several specimens from Pima County, Arizona, fall outside the range of typical Q. hypoleucoides, suggesting hybridization with the Mexican Q. mcvaughii Spellenberg (R. Spellenberg 1992).

Selected References

None.

Lower Taxa

None.