Difference between revisions of "Ostrya knowltonii"
Gard. & Forest 7: 114. 1894.
Common names: Knowlton's hop-hornbeam western hop-hornbeam ironwood
Endemic
Synonyms: Ostrya baileyi Rose
Treatment appears in FNA Volume 3.
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| − | |name= | + | |name=Ostrya baileyi |
|authority=Rose | |authority=Rose | ||
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|hierarchy=Betulaceae;Betulaceae subfam. Coryloideae;Ostrya;Ostrya knowltonii | |hierarchy=Betulaceae;Betulaceae subfam. Coryloideae;Ostrya;Ostrya knowltonii | ||
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Trees,</b> to 9 m; crowns open, narrowly rounded. <b>Bark</b> brownish gray, broken into narrow vertical scales or rather ragged strips. <b>Twigs</b> sparsely to moderately pubescent, often with stipitate glands. <b>Leaves</b>: petiole covered with stipitate glands. <b>Leaf</b> blade ovate or broadly ovate-elliptic to broadly elliptic or nearly orbiculate, 2.5–6.5 × 1.5–5 cm, base narrowly rounded to cordate or cuneate, margins sharply and unevenly doubly serrate, apex acute; surfaces abaxially pubescent, especially on veins. <b>Inflorescences</b>: staminate catkins 2–3 cm; pistillate catkins 0.6–1 cm. <b>Infructescences</b> 2.5–4 × 1.8–2.5 cm; bracts 1–1.8 × 0.5–1 cm.</span><!-- |
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|elevation=1200–2400 m | |elevation=1200–2400 m | ||
|distribution=Ariz.;N.Mex.;Tex.;Utah. | |distribution=Ariz.;N.Mex.;Tex.;Utah. | ||
| − | |discussion=<p>Ostrya knowltonii occurs sporadically throughout the arid Southwest, including both rims of the Grand Canyon. On the basis of morphology and phytogeography, it appears to be more closely allied with Ostrya in mountainous western Mexico than with the eastern O. virginiana.</p> | + | |discussion=<p><i>Ostrya knowltonii</i> occurs sporadically throughout the arid Southwest, including both rims of the Grand Canyon. On the basis of morphology and phytogeography, it appears to be more closely allied with <i>Ostrya</i> in mountainous western Mexico than with the eastern <i>O. virginiana</i>.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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name=Ostrya knowltonii | name=Ostrya knowltonii | ||
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|authority=Coville | |authority=Coville | ||
|rank=species | |rank=species | ||
|parent rank=genus | |parent rank=genus | ||
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|family=Betulaceae | |family=Betulaceae | ||
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|publication year=1894 | |publication year=1894 | ||
|special status=Endemic | |special status=Endemic | ||
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|subfamily=Betulaceae subfam. Coryloideae | |subfamily=Betulaceae subfam. Coryloideae | ||
|genus=Ostrya | |genus=Ostrya | ||
|species=Ostrya knowltonii | |species=Ostrya knowltonii | ||
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Latest revision as of 22:47, 5 November 2020
Trees, to 9 m; crowns open, narrowly rounded. Bark brownish gray, broken into narrow vertical scales or rather ragged strips. Twigs sparsely to moderately pubescent, often with stipitate glands. Leaves: petiole covered with stipitate glands. Leaf blade ovate or broadly ovate-elliptic to broadly elliptic or nearly orbiculate, 2.5–6.5 × 1.5–5 cm, base narrowly rounded to cordate or cuneate, margins sharply and unevenly doubly serrate, apex acute; surfaces abaxially pubescent, especially on veins. Inflorescences: staminate catkins 2–3 cm; pistillate catkins 0.6–1 cm. Infructescences 2.5–4 × 1.8–2.5 cm; bracts 1–1.8 × 0.5–1 cm.
Phenology: Flowering late spring.
Habitat: Streamsides and rocky slopes in moist canyons
Elevation: 1200–2400 m
Distribution
Ariz., N.Mex., Tex., Utah.
Discussion
Ostrya knowltonii occurs sporadically throughout the arid Southwest, including both rims of the Grand Canyon. On the basis of morphology and phytogeography, it appears to be more closely allied with Ostrya in mountainous western Mexico than with the eastern O. virginiana.
Selected References
None.
Lower Taxa
None.