Difference between revisions of "Quercus stellata"
Beytr. Teut. Forstwiss., 78, plate 6, fig. 15. 1787.
Common names: Post oak
EndemicIllustrated
Synonyms: Quercus minor (Marshall) Sargent Quercus obtusiloba Michaux
Treatment appears in FNA Volume 3.
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|common_names=Post oak | |common_names=Post oak | ||
|special_status={{Treatment/ID/Special_status | |special_status={{Treatment/ID/Special_status | ||
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|label=Endemic | |label=Endemic | ||
}}{{Treatment/ID/Special_status | }}{{Treatment/ID/Special_status | ||
|code=F | |code=F | ||
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|basionyms= | |basionyms= | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
| − | |name= | + | |name=Quercus minor |
|authority=(Marshall) Sargent | |authority=(Marshall) Sargent | ||
| − | }}{{Treatment/ID/Synonym | + | |rank=species |
| − | |name= | + | }} {{Treatment/ID/Synonym |
| + | |name=Quercus obtusiloba | ||
|authority=Michaux | |authority=Michaux | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Fagaceae;Quercus;Quercus sect. Quercus;Quercus stellata | |hierarchy=Fagaceae;Quercus;Quercus sect. Quercus;Quercus stellata | ||
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Trees,</b> deciduous, to 20(-30) m. <b>Bark</b> light gray, scaly. <b>Twigs</b> yellowish or grayish, (2-)3-5 mm diam., densely stellate-pubescent. <b>Buds</b> reddish brown, ovoid, to 4 mm, apex obtuse or acute, sparsely pubescent. <b>Leaves</b>: petiole 3-15(-30) mm. <b>Leaf</b> blade obovate to narrowly obovate, elliptic or obtriangular, 40-150(-200) × 20-100(-120) mm, rather stiff and hard, base rounded-attenuate to cordate, sometimes cuneate, margins shallowly to deeply lobed, lobes rounded or spatulate, usually distal 2 lobes divergent at right angles to midrib in cruciform pattern, secondary veins 3-5 on each side, apex broadly rounded; surfaces abaxially yellowish green, with crowded yellowish glandular hairs and scattered minute, 6-8-rayed, appressed or semi-appressed stellate hairs, not velvety to touch, adaxially dark or yellowish green, dull or glossy, sparsely stellate, often somewhat sandpapery with harsh hairs. <b>Acorns</b> 1-3, subsessile or on peduncle to 6(-40) mm; cup deeply saucer-shaped, proximally rounded or constricted, 7-12(-18) mm deep × (7-)10-15(-25) mm wide, enclosing 1/4-2/3 nut, scales tightly appressed, finely grayish pubescent; nut light brown, ovoid or globose, 10-20 × 8-12(-20) mm, glabrous or finely puberulent. <b>Cotyledons</b> distinct.</span><!-- |
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|elevation=0-750 m | |elevation=0-750 m | ||
|distribution=Ala.;Ark.;Conn.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Md.;Mass.;Miss.;Mo.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Va.;W.Va. | |distribution=Ala.;Ark.;Conn.;Del.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Md.;Mass.;Miss.;Mo.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Va.;W.Va. | ||
| − | |discussion=<p>Quercus stellata is often identified by its commonly cross-shaped leaf form, particularly in the eastern part of its range. All individuals and populations do not express this characteristic, however. Moreover, Q. stellata has broad overlap with Q. margaretta and even with some forms of the blackjack oak, Q. marilandica, one of its most common associates. The thick yellowish twigs with indument of stellate hairs and the dense harsh stellate hairs on the abaxial leaf surface are better diagnostic characteristics when variation includes leaf forms that are not obviously cruciform.</p><!-- | + | |discussion=<p><i>Quercus stellata</i> is often identified by its commonly cross-shaped leaf form, particularly in the eastern part of its range. All individuals and populations do not express this characteristic, however. Moreover, <i>Q. stellata</i> has broad overlap with Q. margaretta and even with some forms of the blackjack oak, <i>Q. marilandica</i>, one of its most common associates. The thick yellowish twigs with indument of stellate hairs and the dense harsh stellate hairs on the abaxial leaf surface are better diagnostic characteristics when variation includes leaf forms that are not obviously cruciform.</p><!-- |
| − | --><p>Native Americans used Quercus stellata medicinally for indigestion, chronic dysentery, mouth sores, chapped skin, hoarseness, and milky urine, as an antiseptic, and as a wash for fever and chills (D. E. Moerman 1986).</p><!-- | + | --><p>Native Americans used <i>Quercus stellata</i> medicinally for indigestion, chronic dysentery, mouth sores, chapped skin, hoarseness, and milky urine, as an antiseptic, and as a wash for fever and chills (D. E. Moerman 1986).</p><!-- |
| − | --><p>Putative hybrids are known with Quercus marilandica, Q. alba, and various other white oaks. Quercus stellata is also one of the few oaks that appears to produce hybrids with species in the live oak group, although obvious intermediates are rarely encountered. Nothospecies names based on putative hybrids involving Q. stellata include: Q. ×stelloides E. J. Palmer (= Q. prinoides × Q. stellata), Q. ×mahloni E. J. Palmer (as Q. sinuata var. breviloba × Q. stellata), Q. ×pseudomargaretta Trelease (= Q. margaretta × Q. stellata), Q. ×sterretti Trelease (= Q. lyrata × Q. stellata), Q. ×macnabiana Sudworth (= Q. sinuata × Q. stellata), Q. ×guadalupensis Sargent (= Q. sinuata × Q. stellata), Q. ×fernowi Trelease (= Q. alba × Q. stellata), and Q. ×bernardensis W. Wolf (= Q. montana × Q. stellata).</p> | + | --><p>Putative hybrids are known with <i>Quercus marilandica</i>, <i>Q. alba</i>, and various other white oaks. <i>Quercus stellata</i> is also one of the few oaks that appears to produce hybrids with species in the live oak group, although obvious intermediates are rarely encountered. Nothospecies names based on putative hybrids involving <i>Q. stellata</i> include: Q. ×stelloides E. J. Palmer (= <i>Q. prinoides</i> × <i>Q. stellata</i>), Q. ×mahloni E. J. Palmer (as <i>Q. sinuata </i>var.<i> breviloba</i> × <i>Q. stellata</i>), Q. ×pseudomargaretta Trelease (= Q. margaretta × <i>Q. stellata</i>), Q. ×sterretti Trelease (= <i>Q. lyrata</i> × <i>Q. stellata</i>), Q. ×macnabiana Sudworth (= <i>Q. sinuata</i> × <i>Q. stellata</i>), Q. ×guadalupensis Sargent (= <i>Q. sinuata</i> × <i>Q. stellata</i>), Q. ×fernowi Trelease (= <i>Q. alba</i> × <i>Q. stellata</i>), and Q. ×bernardensis W. Wolf (= <i>Q. montana</i> × <i>Q. stellata</i>).</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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name=Quercus stellata | name=Quercus stellata | ||
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|authority=Wangenheim | |authority=Wangenheim | ||
|rank=species | |rank=species | ||
|parent rank=section | |parent rank=section | ||
| − | |synonyms= | + | |synonyms=Quercus minor;Quercus obtusiloba |
|basionyms= | |basionyms= | ||
|family=Fagaceae | |family=Fagaceae | ||
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|publication title=Beytr. Teut. Forstwiss., | |publication title=Beytr. Teut. Forstwiss., | ||
|publication year=1787 | |publication year=1787 | ||
| − | |special status=Endemic; | + | |special status=W1;Endemic;Illustrated |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V3/V3_160.xml |
|genus=Quercus | |genus=Quercus | ||
|section=Quercus sect. Quercus | |section=Quercus sect. Quercus | ||
|species=Quercus stellata | |species=Quercus stellata | ||
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Latest revision as of 21:46, 5 November 2020
Trees, deciduous, to 20(-30) m. Bark light gray, scaly. Twigs yellowish or grayish, (2-)3-5 mm diam., densely stellate-pubescent. Buds reddish brown, ovoid, to 4 mm, apex obtuse or acute, sparsely pubescent. Leaves: petiole 3-15(-30) mm. Leaf blade obovate to narrowly obovate, elliptic or obtriangular, 40-150(-200) × 20-100(-120) mm, rather stiff and hard, base rounded-attenuate to cordate, sometimes cuneate, margins shallowly to deeply lobed, lobes rounded or spatulate, usually distal 2 lobes divergent at right angles to midrib in cruciform pattern, secondary veins 3-5 on each side, apex broadly rounded; surfaces abaxially yellowish green, with crowded yellowish glandular hairs and scattered minute, 6-8-rayed, appressed or semi-appressed stellate hairs, not velvety to touch, adaxially dark or yellowish green, dull or glossy, sparsely stellate, often somewhat sandpapery with harsh hairs. Acorns 1-3, subsessile or on peduncle to 6(-40) mm; cup deeply saucer-shaped, proximally rounded or constricted, 7-12(-18) mm deep × (7-)10-15(-25) mm wide, enclosing 1/4-2/3 nut, scales tightly appressed, finely grayish pubescent; nut light brown, ovoid or globose, 10-20 × 8-12(-20) mm, glabrous or finely puberulent. Cotyledons distinct.
Phenology: Flowering spring.
Habitat: Usually on xeric sites, dry gravelly and sandy ridges and uplands, dry clays, prairies and limestone hills, woodlands and deciduous forests
Elevation: 0-750 m
Distribution
Ala., Ark., Conn., Del., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Va., W.Va.
Discussion
Quercus stellata is often identified by its commonly cross-shaped leaf form, particularly in the eastern part of its range. All individuals and populations do not express this characteristic, however. Moreover, Q. stellata has broad overlap with Q. margaretta and even with some forms of the blackjack oak, Q. marilandica, one of its most common associates. The thick yellowish twigs with indument of stellate hairs and the dense harsh stellate hairs on the abaxial leaf surface are better diagnostic characteristics when variation includes leaf forms that are not obviously cruciform.
Native Americans used Quercus stellata medicinally for indigestion, chronic dysentery, mouth sores, chapped skin, hoarseness, and milky urine, as an antiseptic, and as a wash for fever and chills (D. E. Moerman 1986).
Putative hybrids are known with Quercus marilandica, Q. alba, and various other white oaks. Quercus stellata is also one of the few oaks that appears to produce hybrids with species in the live oak group, although obvious intermediates are rarely encountered. Nothospecies names based on putative hybrids involving Q. stellata include: Q. ×stelloides E. J. Palmer (= Q. prinoides × Q. stellata), Q. ×mahloni E. J. Palmer (as Q. sinuata var. breviloba × Q. stellata), Q. ×pseudomargaretta Trelease (= Q. margaretta × Q. stellata), Q. ×sterretti Trelease (= Q. lyrata × Q. stellata), Q. ×macnabiana Sudworth (= Q. sinuata × Q. stellata), Q. ×guadalupensis Sargent (= Q. sinuata × Q. stellata), Q. ×fernowi Trelease (= Q. alba × Q. stellata), and Q. ×bernardensis W. Wolf (= Q. montana × Q. stellata).
Selected References
None.
Lower Taxa
None.