Difference between revisions of "Platanus wrightii"
Proc. Amer. Acad. Arts 10: 349. 1875.
Common names: Arizona sycamore
Selected by author to be illustrated
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> to 25 m; trunks straight and erect to inclined or basally reclining or prostrate, to 1.2(-2) m diam., lower branches becoming thick, contorted. <b>Leaves</b>: stipules entire to somewhat dentate. <b>Leaf</b> blade dark green, deeply 3-5(-7)-lobed, 9-25 × 9-30 cm, rather thick; lobes of blade much longer than wide, basal lobes usually smaller and spreading, not reflexed, sinuses broad and very deeply concave, depth of distal sinuses equal or greater than distance from sinus to base of blade, terminal leaf lobe about 2/3 or more length of blade; margins entire to serrulate, apex acute to acuminate; surfaces abaxially and adaxially glabrescent. <b>Pistillate</b> inflorescences: heads (1-)2-4; fruiting heads to 20 mm diam., lateral heads sessile or pedunculate, peduncle often eventually obscured by maturing achenes; fruiting rachis to 25 cm. <b>Achenes</b> 5-8 mm, basal hairs about 2/3 or equal to length of achenes. <b>2n</b> = 42.</span><!-- |
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|habitat=Often abundant in riparian forests, especially in montane canyons, extending into deserts along streams and near springs, and cultivated | |habitat=Often abundant in riparian forests, especially in montane canyons, extending into deserts along streams and near springs, and cultivated | ||
|elevation=600-2000+m | |elevation=600-2000+m | ||
| − | |distribution=Ariz.;N.Mex.;Mexico (Chihuahua | + | |distribution=Ariz.;N.Mex.;Mexico (Chihuahua;Sinaloa;and Sonora). |
|discussion=<p>L. D. Benson (1943) reported intermediates between Platanus wrightii and P. racemosa in southern California. He reduced P. wrightii to P. racemosa var. wrightii (S. Watson) L. Benson. Most authors have retained that taxon at the specific level because of its more deeply lobed, more glabrate leaves and its often pedunculate fruiting heads. Very low yields of germinable seeds were obtained from crosses of P. wrightii and P. racemosa with P. occidentalis (F. S. Santamour Jr. 1972b).</p> | |discussion=<p>L. D. Benson (1943) reported intermediates between Platanus wrightii and P. racemosa in southern California. He reduced P. wrightii to P. racemosa var. wrightii (S. Watson) L. Benson. Most authors have retained that taxon at the specific level because of its more deeply lobed, more glabrate leaves and its often pedunculate fruiting heads. Very low yields of germinable seeds were obtained from crosses of P. wrightii and P. racemosa with P. occidentalis (F. S. Santamour Jr. 1972b).</p> | ||
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|habitat=Often abundant in riparian forests, especially in montane canyons, extending into deserts along streams and near springs, and cultivated | |habitat=Often abundant in riparian forests, especially in montane canyons, extending into deserts along streams and near springs, and cultivated | ||
|elevation=600-2000+m | |elevation=600-2000+m | ||
| − | |distribution=Ariz.;N.Mex.;Mexico (Chihuahua | + | |distribution=Ariz.;N.Mex.;Mexico (Chihuahua;Sinaloa;and Sonora). |
|reference=None | |reference=None | ||
|publication title=Proc. Amer. Acad. Arts | |publication title=Proc. Amer. Acad. Arts | ||
|publication year=1875 | |publication year=1875 | ||
|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_1000.xml |
|genus=Platanus | |genus=Platanus | ||
|species=Platanus wrightii | |species=Platanus wrightii | ||
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-->[[Category:Treatment]][[Category:Platanus]] | -->[[Category:Treatment]][[Category:Platanus]] | ||
Revision as of 14:29, 27 July 2019
Trees, to 25 m; trunks straight and erect to inclined or basally reclining or prostrate, to 1.2(-2) m diam., lower branches becoming thick, contorted. Leaves: stipules entire to somewhat dentate. Leaf blade dark green, deeply 3-5(-7)-lobed, 9-25 × 9-30 cm, rather thick; lobes of blade much longer than wide, basal lobes usually smaller and spreading, not reflexed, sinuses broad and very deeply concave, depth of distal sinuses equal or greater than distance from sinus to base of blade, terminal leaf lobe about 2/3 or more length of blade; margins entire to serrulate, apex acute to acuminate; surfaces abaxially and adaxially glabrescent. Pistillate inflorescences: heads (1-)2-4; fruiting heads to 20 mm diam., lateral heads sessile or pedunculate, peduncle often eventually obscured by maturing achenes; fruiting rachis to 25 cm. Achenes 5-8 mm, basal hairs about 2/3 or equal to length of achenes. 2n = 42.
Phenology: Flowering spring; fruiting late fall.
Habitat: Often abundant in riparian forests, especially in montane canyons, extending into deserts along streams and near springs, and cultivated
Elevation: 600-2000+m
Distribution
Ariz., N.Mex., Mexico (Chihuahua, Sinaloa, and Sonora).
Discussion
L. D. Benson (1943) reported intermediates between Platanus wrightii and P. racemosa in southern California. He reduced P. wrightii to P. racemosa var. wrightii (S. Watson) L. Benson. Most authors have retained that taxon at the specific level because of its more deeply lobed, more glabrate leaves and its often pedunculate fruiting heads. Very low yields of germinable seeds were obtained from crosses of P. wrightii and P. racemosa with P. occidentalis (F. S. Santamour Jr. 1972b).
Selected References
None.
Lower Taxa
None.
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