View source for Clethra

{{Treatment/ID
|accepted_name=Clethra
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=1: 396. 1753
|year=1753
}}, {{Treatment/Publication
|title=Gen. Pl. ed.
|place=5. 188. 1754 ,
}}
|common_names=Sweet pepperbush
|basionyms=
|synonyms=
|hierarchy=Clethraceae;Clethra
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Clethraceae]]</div><div class="higher-taxon"><small>genus</small>[[Clethra]]</div></div>
|etymology=Greek klethra, alder, alluding to resemblance of leaves of certain species
|volume=Volume 8
|mention_page=
|treatment_page=page 364
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>sometimes spreading by root suckers. <b>Leaves</b> spirally arranged, often seemingly verticillate at ends of twigs; blade not coriaceous, margins revolute, surfaces glabrous or tomentose abaxially, glabrous or with sparse, short-stellate hairs, especially when young, adaxially, venation pinnate. <b>Inflorescences</b> borne on new growth, racemes solitary or in clusters of 2–4, bracteate. <b>Pedicels</b> ridged and somewhat flattened laterally, 1-bracteate basally. <b>Flowers</b> fragrant; sepals imbricate in bud; petals spreading at anthesis, weakly 5-ridged, apex obtuse; filaments adnate to corolla basally, straight or S-shaped, elongate, glabrous or hairy; anthers reflexed in bud, erect at anthesis, obsagittate, base attenuate, papillose, thecae divergent distally; style straight. <b>Capsules</b> globose, sutures thin. <b>Seeds</b> strongly flattened, slightly winged; testa thin. <b>x</b> = 8.</span><!--

-->{{Treatment/Body
|distribution=s;e North America;Mexico;Central America;South America;e Asia;Atlantic Islands (Madeira).
|discussion=<p>Species ca. 65 (3 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaf blades: apex acuminate, margins toothed, proximalmost tooth averaging 2.4 cm distal to base; bracts longer than flowers; filaments glabrous or with scattered, simple hairs.
|[[Clethra acuminata|Clethra acuminata]]
|-id=key-0-1
|1
|Leaf blades: apex obtuse to acute, margins toothed, proximalmost tooth averaging 3.4 cm distal to base; bracts shorter than flowers; filaments glabrous
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Young shoots and abaxial surface of new leaves sparsely hairy, adaxial surface glabrous; petioles 2.5-3.5(-6) cm; styles 6-7 mm, hairy in proximal 1/2, hairs simple, straight; filaments 0.2-0.3(-0.4) mm wide.
|[[Clethra alnifolia|Clethra alnifolia]]
|-id=key-0-2
|2
|Young shoots and abaxial surface of new leaves woolly-tomentose, adaxial surface sparsely hairy; petioles 0.5-1(-1.5) cm; styles 3.5-5 mm, hairy; filaments 0.4-0.5(-0.7) mm wide.
|[[Clethra tomentosa|Clethra tomentosa]]
|}
</div></div><!--

-->{{#Taxon:
name=Clethra
|author=
|authority=Linnaeus
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Clethraceae
|distribution=s;e North America;Mexico;Central America;South America;e Asia;Atlantic Islands (Madeira).
|reference=None
|publication title=Sp. Pl.;Gen. Pl. ed.
|publication year=1753;
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V8/V8_705.xml
|genus=Clethra
}}<!--

-->[[Category:Treatment]][[Category:Clethraceae]]