Difference between revisions of "Quercus hypoleucoides"
Bull. Mus. Natl. Hist. Nat., sér. 2, 4: 124. 1932.
Common names: Silverleaf oak
Selected by author to be illustrated
Synonyms: Species Engelmann
Treatment appears in FNA Volume 3.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Trees </b>or shrubs, evergreen, to 10 m. <b>Bark</b> black, deeply furrowed. <b>Twigs</b> dark reddish brown, 1.5-3 mm diam., pubescent. <b>Terminal</b> buds light chestnut brown, ovoid, 2.5-4.5 mm, glabrous except for ciliate scale margins, occasionally with tuft of hairs at apex. <b>Leaves</b>: petiole 1.5-13 mm, densely pubescent. <b>Leaf</b> 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. <b>Acorns</b> 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.</span><!-- |
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|habitat=Common in moist canyons and on ridges | |habitat=Common in moist canyons and on ridges | ||
|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> | |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> | ||
|tables= | |tables= | ||
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|habitat=Common in moist canyons and on ridges | |habitat=Common in moist canyons and on ridges | ||
|elevation=1500-2700 m | |elevation=1500-2700 m | ||
| − | |distribution=Ariz.;N.Mex.;Tex.;n Mexico | + | |distribution=Ariz.;N.Mex.;Tex.;n Mexico. |
|reference=None | |reference=None | ||
|publication title=Bull. Mus. Natl. Hist. Nat., sér. | |publication title=Bull. Mus. Natl. Hist. Nat., sér. | ||
|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- | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V3/V3_863.xml |
|genus=Quercus | |genus=Quercus | ||
|section=Quercus sect. Lobatae | |section=Quercus sect. Lobatae | ||
|species=Quercus hypoleucoides | |species=Quercus hypoleucoides | ||
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-->[[Category:Treatment]][[Category:Quercus sect. Lobatae]] | -->[[Category:Treatment]][[Category:Quercus sect. Lobatae]] | ||
Revision as of 13:52, 27 July 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
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.