View source for Chloracantha

{{Treatment/ID
|accepted_name=Chloracantha
|accepted_authority=G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=70: 378. 1991
|year=1991
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Aster sect. Spinosi
|authority=(Alexander) A. G. Jones
}} {{Treatment/ID/Synonym
|name=Erigeron sect. Spinosi
|authority=(Alexander) G. L. Nesom & S. D. Sundberg
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Chloracantha
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Astereae]]</div><div class="higher-taxon"><small>genus</small>[[Chloracantha]]</div></div>
|etymology=Greek chloros, green, and akantha, thorn
|volume=Volume 20
|mention_page=page 7, 16
|treatment_page=page 358
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials </b>or subshrubs (commonly appearing herbaceous), 50–150(–250) cm, sometimes glaucous, glabrous or glabrate (forming large clones; stoutly rhizomatous). <b>Stems</b> erect (strict), lateral branches sharply ascending, often modified to thorns. <b>Leaves</b> cauline (early withering); alternate; sessile; blades 1-nerved, oblanceolate, margins entire or rarely with 1–2 pairs of small teeth. <b>Heads</b> radiate, borne singly in loose corymbo-paniculiform arrays. <b>Involucres</b> broadly turbinate to hemispheric, 4.5–7.5 × 5–6 mm. <b>Phyllaries</b> 20–55 in 4–5 series, (1–)3(–5) parallel-nerved (nerves orange-resinous; flat), oblong-elliptic to lanceolate, unequal, margins hyaline (apices rounded to lanceolate), faces glabrous. <b>Receptacles</b> shallowly convex, smooth, epaleate. <b>Ray</b> florets 20–33 in 1(–2) series, pistillate, fertile; corollas white (coiling at maturity). <b>Disc</b> florets (13–)20–70, bisexual, fertile; corollas yellow (with orange resin ducts), tubes 2 times longer than narrowly funnelform throats, lobes 5, erect to spreading, deltate; style-branch appendages acute to deltate. <b>Cypselae</b> fusiform-cylindric, slightly compressed, 5(–6)-nerved, faces glabrous; pappi persistent, of 30–60 tawny, barbellate, apically attenuate bristles in 1–2 series, usually plus shorter outer setae. <b>x</b> = 9.</span><!--

-->{{Treatment/Body
|distribution=sw United States;w Mexico;Central America.
|discussion=<p>Species 1.</p><!--
--><p><i>Chloracantha spinosa</i> produces no terminal resting buds and its evergreen stems without periderm look herbaceous, but it behaves more like a subshrub in its perennial stems (alive for up to four growing seasons) with a quickly developed vascular cambium and production of axillary buds with bud scales. All or almost all of the leaves are usually shed by flowering and the colonies become masses of erect, green stems with loosely paniculiform arrays of small, terminal, white-rayed heads. Geographic variation within <i>C. spinosa</i> has been studied in detail by S. D. Sundberg (1991), who provided a treatment of its infraspecific taxonomy and discussions of typification problems.</p>
|tables=
|references={{Treatment/Reference
|id=sundberg1991a
|text=Sundberg, S. D. 1991. Infraspecific classification of Chloracantha spinosa (Benth.) Nesom (Asteraceae) Astereae. Phytologia 70: 382–391.
}}
}}<!--

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-->{{#Taxon:
name=Chloracantha
|author=Scott D. Sundberg†;Guy L. Nesom
|authority=G. L. Nesom
|rank=genus
|parent rank=tribe
|synonyms=Aster sect. Spinosi;Erigeron sect. Spinosi
|basionyms=
|family=Asteraceae
|illustrator=Linny Heagy
|distribution=sw United States;w Mexico;Central America.
|reference=sundberg1991a
|publication title=Phytologia
|publication year=1991
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V20_828.xml
|tribe=Asteraceae tribe Astereae
|genus=Chloracantha
}}<!--

-->[[Category:Treatment]][[Category:Asteraceae tribe Astereae]]