Difference between revisions of "Quercus wislizeni"
in A. P. de Candolle and A. L. P. de Candolle, Prodr. 16(2): 67. 1864.
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}}{{Treatment/ID/Special_status | }}{{Treatment/ID/Special_status | ||
|code=F | |code=F | ||
| − | |label= | + | |label=Illustrated |
}} | }} | ||
|basionyms= | |basionyms= | ||
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|name=Quercus parvula | |name=Quercus parvula | ||
|authority=Greene | |authority=Greene | ||
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Quercus parvula var. shrevei | |name=Quercus parvula var. shrevei | ||
|authority=(C. H. Muller) Nixon | |authority=(C. H. Muller) Nixon | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Quercus parvula var. tamalpaisensis | |name=Quercus parvula var. tamalpaisensis | ||
|authority=S. K. Langer | |authority=S. K. Langer | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Quercus wislizenii var. frutescens | |name=Quercus wislizenii var. frutescens | ||
|authority=Engelmann | |authority=Engelmann | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Fagaceae;Quercus;Quercus sect. Lobatae;Quercus wislizenii | |hierarchy=Fagaceae;Quercus;Quercus sect. Lobatae;Quercus wislizenii | ||
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|distribution=Calif. | |distribution=Calif. | ||
|discussion=<p>Shrubs with oval leaves 25-38 mm and margins entire or deeply lobed-dentate may be treated as <i>Quercus wislizenii</i> var. frutescens. J. M. Tucker (1993) treated Q. parvula as a distinct species, distinguished from <i>Q. wislizenii</i> by its larger leaves (30-90 versus 20-50 mm), by the dull, olive-green, abaxial leaf surface (versus shiny, yellow-green), and by nuts that are abruptly tapered proximal to the middle (versus gradually tapered).</p><!-- | |discussion=<p>Shrubs with oval leaves 25-38 mm and margins entire or deeply lobed-dentate may be treated as <i>Quercus wislizenii</i> var. frutescens. J. M. Tucker (1993) treated Q. parvula as a distinct species, distinguished from <i>Q. wislizenii</i> by its larger leaves (30-90 versus 20-50 mm), by the dull, olive-green, abaxial leaf surface (versus shiny, yellow-green), and by nuts that are abruptly tapered proximal to the middle (versus gradually tapered).</p><!-- | ||
| − | --><p>Tucker recognized two varieties of <i>Quercus</i> parvula: Q. parvula < | + | --><p>Tucker recognized two varieties of <i>Quercus</i> parvula: Q. parvula <i></i>var.<i> parvula</i> is a shrub of 1-3 m and Q. parvula var. shrevei is a tree less than 17 m. S. K. Langer (1993) recognized a third variety, Q. parvula var. tamalpaisensis,based on several small populations on or near Mount Tamalpais, differentiated primarily by having larger leaves (50-160 × 20-60 mm) with attenuate-dentate margins.</p><!-- |
--><p><i>Quercus wislizenii</i> reportedly hybridizes with <i>Q. agrifolia</i> and <i>Q. kelloggii</i> (W. B. Brophy and D. R. Parnell 1974).</p> | --><p><i>Quercus wislizenii</i> reportedly hybridizes with <i>Q. agrifolia</i> and <i>Q. kelloggii</i> (W. B. Brophy and D. R. Parnell 1974).</p> | ||
|tables= | |tables= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Quercus wislizenii | name=Quercus wislizenii | ||
| − | |||
|authority=A. de Candolle in A. P. de Candolle and A. L. P. de Candolle | |authority=A. de Candolle in A. P. de Candolle and A. L. P. de Candolle | ||
|rank=species | |rank=species | ||
| Line 68: | Line 71: | ||
|publication title=in A. P. de Candolle and A. L. P. de Candolle, Prodr. | |publication title=in A. P. de Candolle and A. L. P. de Candolle, Prodr. | ||
|publication year=1864 | |publication year=1864 | ||
| − | |special status=Endemic; | + | |special status=Endemic;Illustrated |
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V3/V3_332.xml |
|genus=Quercus | |genus=Quercus | ||
|section=Quercus sect. Lobatae | |section=Quercus sect. Lobatae | ||
Revision as of 21:27, 16 December 2019
Trees or shrubs, evergreen, to 22 m. Bark nearly black, deeply furrowed with broad scaly ridges. Twigs brown to red-brown, 1.5-3 mm diam., glabrous or sparsely pubescent. Terminal buds light chestnut brown to dark reddish brown, ovoid to conic, 3-9 mm, glabrous or with tuft of minute hairs at apex. Leaves: petiole 3-20 mm, glabrous or sparsely pubescent. Leaf blade circular to oblong, usually ovate, planar, 25-70 × 20-50 mm, base obtuse to cordate, margins entire or spinose with up to 16 awns, apex acute to rounded; surfaces abaxially and adaxially glabrous, veins little raised on either surface. Acorns biennial; cup deeply and narrowly cup-shaped or U-shaped, 9-19 mm high × 7-18 mm wide, covering 1/3-1/2(-2/3) nut, outer surface glabrous to sparsely puberulent, inner surface glabrous or pubescent on innermost 1/3, occasionally uniformly pubescent, scales acute, tips loose; nut narrowly conic or ovoid to narrowly oblong, 21-44 × 8-14 mm, glabrous, scar diam. 2.5-7.5 mm. 2n = 24.
Phenology: Flowering late spring.
Habitat: Valleys, slopes, and sand chaparral
Elevation: 300-1900 m
Discussion
Shrubs with oval leaves 25-38 mm and margins entire or deeply lobed-dentate may be treated as Quercus wislizenii var. frutescens. J. M. Tucker (1993) treated Q. parvula as a distinct species, distinguished from Q. wislizenii by its larger leaves (30-90 versus 20-50 mm), by the dull, olive-green, abaxial leaf surface (versus shiny, yellow-green), and by nuts that are abruptly tapered proximal to the middle (versus gradually tapered).
Tucker recognized two varieties of Quercus parvula: Q. parvula var. parvula is a shrub of 1-3 m and Q. parvula var. shrevei is a tree less than 17 m. S. K. Langer (1993) recognized a third variety, Q. parvula var. tamalpaisensis,based on several small populations on or near Mount Tamalpais, differentiated primarily by having larger leaves (50-160 × 20-60 mm) with attenuate-dentate margins.
Quercus wislizenii reportedly hybridizes with Q. agrifolia and Q. kelloggii (W. B. Brophy and D. R. Parnell 1974).
Selected References
None.