View source for Chromolaena

{{Treatment/ID
|accepted_name=Chromolaena
|accepted_authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
|publications={{Treatment/Publication
|title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|place=5: 133. 1836
|year=1836
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Eupatorieae;Chromolaena
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Eupatorieae]]</div><div class="higher-taxon"><small>genus</small>[[Chromolaena]]</div></div>
|etymology=Greek chroma, color, and laina, cloak, evidently alluding to the colored phyllaries of some species, including the type
|volume=Volume 21
|mention_page=page 461, 462, 481
|treatment_page=page 544
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials </b>or shrubs (sometimes scandent), 20–250 cm (fibrous-rooted). <b>Stems</b> erect or clambering, sparsely to densely branched. <b>Leaves</b> cauline; opposite [alternate, verticillate]; petiolate or sessile; blades usually 3-nerved from bases, mostly deltate to ovate or elliptic, sometimes linear, margins dentate or lobed, faces glabrous or puberulent to tomentose, sometimes gland-dotted. <b>Heads</b> discoid, in corymbiform to thyrsiform arrays. <b>Involucres</b> cylindric [campanulate to hemispheric], 2–7 mm diam. <b>Phyllaries</b> usually readily falling (at least in fruit), 18–65+ in 4–6+ series, 3–5-nerved, ovate to oblong or lanceolate, unequal (papery or herbaceous). <b>Florets</b> [6–]15–40[–75]; corollas white or purple to blue, lavender, or reddish, throats cylindric (lengths 3–4 times diams.); styles: bases not enlarged, glabrous, branches linear to linear-clavate. <b>Receptacles</b> flat to convex, paleate or epaleate. <b>Cypselae</b> prismatic, (3–)5-ribbed, scabrellous, usually gland-dotted as well; pappi persistent, of ca. 40 barbellate bristles in 1 series. <b>x</b> = 10.</span><!--

-->{{Treatment/Body
|distribution=se;sc United States;Mexico;Central America;South America (especially Brazil).
|discussion=<p>Species ca. 165 (4 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
|Leaves: petioles 0 or 0.5–1(–3) mm; blades linear-lanceolate to elliptic-lanceolate, bases tapered; apices of inner phyllaries ± spreading (pinkish purple, hyaline, petaloid, slightly expanded, truncate)
|[[Chromolaena ivifolia|Chromolaena ivifolia]]
|-id=key-0-1
|1
|Leaves: petioles 5–20 mm; blades mostly deltate to ovate-lanceolate, bases ± abruptly contracted; apices of inner phyllaries appressed (not notably expanded or petaloid)
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Shrubs; heads usually in 3s, sometimes borne singly; involucres turbinate to campanulate
|[[Chromolaena bigelovii|Chromolaena bigelovii]]
|-id=key-0-2
|2
|Perennials or subshrubs; heads in clusters of 5–50+ in (terminal or lateral) corymbiform arrays; involucres cylindric
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Leaf blades mostly 1.5–4 cm; involucres 5.5–7.5(–8) mm
|[[Chromolaena frustrata|Chromolaena frustrata]]
|-id=key-0-3
|3
|Leaf blades mostly (3.5–)5–10 cm; involucres (7–)8–10 mm
|[[Chromolaena odorata|Chromolaena odorata]]
|}
</div></div><!--

-->{{#Taxon:
name=Chromolaena
|author=Guy L. Nesom
|authority=de Candolle in A. P. de Candolle and A. L. P. P. de Candolle
|rank=genus
|parent rank=tribe
|synonyms=
|basionyms=
|family=Asteraceae
|distribution=se;sc United States;Mexico;Central America;South America (especially Brazil).
|reference=None
|publication title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|publication year=1836
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V21_1380.xml
|tribe=Asteraceae tribe Eupatorieae
|genus=Chromolaena
}}<!--

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