View source for Styrax platanifolius subsp. youngiae

{{Treatment/ID
|accepted_name=Styrax platanifolius subsp. youngiae
|accepted_authority=(Cory) P. W. Fritsch
|publications={{Treatment/Publication
|title=Ann. Missouri Bot. Gard.
|place=84: 744. 1998 ,
}}
|common_names=Young’s snowbell
|basionyms={{Treatment/ID/Basionym
|name=Styrax youngiae
|authority=Cory
|publication_title=Madroño
|publication_place=7: 113. 1943 (as youngae)
}}
|synonyms={{Treatment/ID/Synonym
|name=Styrax platanifolius var. youngiae
|authority=(Cory) B. L. Turner
}}
|hierarchy=Styracaceae;Styrax;Styrax platanifolius;Styrax platanifolius subsp. youngiae
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Styracaceae]]</div><div class="higher-taxon"><small>genus</small>[[Styrax]]</div><div class="higher-taxon"><small>species</small>[[Styrax platanifolius]]</div><div class="higher-taxon"><small>subspecies</small>[[Styrax platanifolius subsp. youngiae]]</div></div>
|volume=Volume 8
|mention_page=page 343, 344
|treatment_page=page 345
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Young </b>twigs densely white stellate-pubescent and with scattered, orange-brown or dark-brown, stalked, stellate hairs proximally. <b>Leaf</b> blades: margins often undulate, entire or coarsely toothed, abaxial surface with white, stellate-lanate pubescence in addition to scattered orange-brown or dark-brown, stalked, stellate hairs of various lengths on some leaves, surface completely covered and obscured by pubescence, adaxial surface with scattered, stellate hairs. <b>Pedicels</b> white stellate-lanate. <b>Flowers</b>: calyx with thick layer of white stellate-lanate hairs, margins and teeth sparsely glandular, teeth to 0.6 mm, usually shorter; style hairy from proximal end to 60–80% of total length.</span><!--

-->{{Treatment/Body
|phenology=Flowering Apr–May; fruiting Jul–Sep.
|habitat=Igneous substrates [limestone]
|elevation=elevation unknown [900-2000 m]
|distribution=Tex.;Mexico (Coahuila).
|discussion=<p>Of conservation concern.</p><!--
--><p>Plants of <i></i></i>subsp.<i><i> youngiae</i> in the Davis Mountains, at the only known locality in the United States (“Limpia; canyon”), have not been rediscovered. The Davis range consists primarily of igneous rocks; V. L. Cory (1943) assumed that the type came from an igneous rather than a limestone substrate. All subsequent collections of <i></i></i>subsp.<i><i> youngiae</i> that document substrate have come from limestone. Limestone does occur sparsely in the Davis Mountains and all other subspecies of <i>Styrax platanifolius</i> apparently grow exclusively on limestone or limestone derivatives; <i></i></i>subsp.<i><i> youngiae</i> may occur only on limestone substrates as well.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Styrax platanifolius subsp. youngiae
|author=
|authority=(Cory) P. W. Fritsch
|rank=subspecies
|parent rank=species
|synonyms=Styrax platanifolius var. youngiae
|basionyms=Styrax youngiae
|family=Styracaceae
|phenology=Flowering Apr–May; fruiting Jul–Sep.
|habitat=Igneous substrates [limestone]
|elevation=elevation unknown [900-2000 m]
|distribution=Tex.;Mexico (Coahuila).
|reference=None
|publication title=Ann. Missouri Bot. Gard.
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V8/V8_678.xml
|genus=Styrax
|species=Styrax platanifolius
|subspecies=Styrax platanifolius subsp. youngiae
}}<!--

-->[[Category:Treatment]][[Category:Styrax platanifolius]]