View source for Amoreuxia

{{Treatment/ID
|accepted_name=Amoreuxia
|accepted_authority=de Candolle
|publications={{Treatment/Publication
|title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|place=2: 638. 1825
|year=1825
}}
|common_names=Yellowshow
|basionyms=
|synonyms=
|hierarchy=Cochlospermaceae;Amoreuxia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Cochlospermaceae]]</div><div class="higher-taxon"><small>genus</small>[[Amoreuxia]]</div></div>
|etymology=for Pierre-Joseph Amoreux, 1741 – 1824, French physician and naturalist
|volume=Volume 6
|mention_page=page 376, 378
|treatment_page=page 377
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Roots </b>(xylopodia) thick, tuberous or woody. <b>Stems</b> to 60 cm, glabrous or hairy. <b>Leaves</b> long-petiolate; stipules inconspicuous, brown; blade suborbiculate to reniform, 5 or 7(9)-lobed petals with 2 conspicuous red to purple marks at bases; stamens in 2 dimorphic sets, filaments of proximal set longer with cream to dark red anthers, filaments of distal set shorter with yellow or yellow-cream anthers; anthers 2-pored; ovary usually pubescent; style usually surpassing stamens. <b>Capsules</b> pendulous, oblong-obovoid or ovoid to ellipsoid. <b>Seeds</b> glabrous or pilose, hairs sometimes spinelike. <b>x</b> = 6.</span><!--

-->{{Treatment/Body
|distribution=sw United States;Mexico;West Indies (Curaçao);Central America;South America (Colombia;Peru).
|discussion=<p>Species 4 (3 in the flora).</p><!--
--><p>The one species of <i>Amoreuxia</i> not in the flora area is A. malvifolia, which occurs in the Mexican states of Chihuahua and Durango.</p><!--
--><p>Most of the species of <i>Amoreuxia</i> have been important food plants for indigenous tribes of northern Mexico and southwestern United States (W. C. Hodgson 2001; H. H. Poppendieck 1980).</p><!--
--><p><i>Amoreuxia</i> is usually characterized as herbaceous, despite having slightly woody aerial parts and a woody subterranean organ. The woody subterranean organs, known as xylopodia, are made up of rootlike stems. The roots originate from below the xylopodium. They are similar in size and shape to thick carrots; they are brownish outside and creamy white inside.</p><!--
--><p>The species of <i>Amoreuxia</i> are very similar. To separate them, leaf, fruit, and seed characters can generally be used reliably; flower characters appear to be relatively uniform across species (R. McVaugh 2001). According to H. H. Poppendieck (1980), it is probable that <i>Amoreuxia</i> is a tropical taxon that moved northward into Central America and southern North America in relatively recent times with a secondary center of diversification in northern Mexico. Poppendieck hypothesized that the scattered and apparently relictual distribution of <i>A. palmatifida</i> is evidence that it may be most closely related to the primitive species of the genus from which all the currently known species may have evolved. This hypothesis is not strongly supported by the interesting disjunct distributions of <i>A. wrightii</i> in Peru and in Curaçao and the molecular clock data which indicate an earlier divergence for <i>A. wrightii</i> (S. B. Johnson-Fulton 2014).</p><!--
--><p>The flowers of <i>Amoreuxia</i> are very bright and easy to spot in the field; because they open early and usually close by late morning or early afternoon, it is best to search for this genus in the morning.</p>
|tables=
|references={{Treatment/Reference
|id=sprague1922a
|text=Sprague, T. A. 1922. A revision of Amoreuxia. Bull. Misc. Inform. Kew 1922: 96–105.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaf blades 5(7)-lobed, lobes subrhombic, apex rounded to acute, tooth of central lobe apex most distal; seeds glabrous.
|[[Amoreuxia wrightii|Amoreuxia wrightii]]
|-id=key-0-1
|1
|Leaf blades 7(9)-lobed, lobes obovate, spatulate, or linear, apex usually truncate to slightly obtuse, sometimes emarginate, 3–5 teeth of central lobe apex usually equally distal; seeds sparsely pilose or hispid, hairs sometimes spinelike
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Capsules broadly ovoid, 2–4 cm; seeds reniform; ovaries densely short-haired lanate to tomentose or puberulent; stems and petioles subglabrous to sparsely lanulose-puberulent.
|[[Amoreuxia palmatifida|Amoreuxia palmatifida]]
|-id=key-0-2
|2
|Capsules ellipsoid, 5–8 cm; seeds globose; ovaries densely silky-pilose; stems and petioles pilose (hairs wavy, slightly tangled).
|[[Amoreuxia gonzalezii|Amoreuxia gonzalezii]]
|}
</div></div><!--

-->{{#Taxon:
name=Amoreuxia
|authority=de Candolle
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Cochlospermaceae
|distribution=sw United States;Mexico;West Indies (Curaçao);Central America;South America (Colombia;Peru).
|reference=sprague1922a
|publication title=in A. P. de Candolle and A. L. P. P. de Candolle, Prodr.
|publication year=1825
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V6/V6_699.xml
|genus=Amoreuxia
}}<!--

-->[[Category:Treatment]][[Category:Cochlospermaceae]]