View source for Dedeckera

{{Treatment/ID
|accepted_name=Dedeckera
|accepted_authority=Reveal & J. T. Howell
|publications={{Treatment/Publication
|title=Brittonia
|place=28: 245, fig. 1. 1976
|year=1976
}}
|common_names=Eureka or July gold
|basionyms=
|synonyms=
|hierarchy=Polygonaceae;Polygonaceae subfam. Eriogonoideae;Dedeckera
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Polygonaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Polygonaceae subfam. Eriogonoideae]]</div><div class="higher-taxon"><small>genus</small>[[Dedeckera]]</div></div>
|etymology=for Mary Caroline DeDecker, 1909–2000, noted California conservationist
|volume=Volume 5
|mention_page=page 220, 323
|treatment_page=page 430
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism growth form">Shrubs;</span> <span class="statement" id="st-d0_s1" data-properties="taproot fragility or size">taproot stout.</span> <span class="statement" id="st-d0_s2" data-properties="stem orientation;stem texture;stem pubescence"><b>Stems </b>spreading, woody, hirsutulous;</span> <span class="statement" id="st-d0_s3" data-properties="caudex presence">caudex absent;</span> <span class="statement" id="st-d0_s4" data-properties="flowering-stem location;flowering-stem orientation;flowering-stem growth form or texture;flowering-stem pubescence">aerial flowering-stems spreading, herbaceous, hirsutulous.</span> <span class="statement" id="st-d0_s5" data-properties="leaf duration;leaf arrangement;node life cycle;node quantity;leaf life cycle;leaf quantity"><b>Leaves </b>usually persistent through anthesis, 1 per node, cauline, alternate;</span> <span class="statement" id="st-d0_s6" data-properties="petiole presence;blade size or width;blade arrangement or shape;margin architecture or shape">petiole present, blade narrow to broadly elliptic, margins entire.</span> <span class="statement" id="st-d0_s7" data-properties="inflorescence position or structure subtype;inflorescence architecture"><b>Inflorescences </b>terminal, cymose;</span> <span class="statement" id="st-d0_s8" data-properties="branch architecture;branch fragility;branch architecture;branch shape;branch pubescence;node architecture;node architecture;flower quantity;flower architecture;flower quantity">branches dichotomous, not brittle or disarticulating into segments, round, hirsutulous, each node with 1 short-pedicellate flower and 4–12 sessile or subsessile flowers;</span> <span class="statement" id="st-d0_s9" data-properties="bract quantity;bract architecture or shape;bract quantity;bract shape;bract fusion;bract pubescence">bracts 3–4 at proximal nodes and leaflike, 2–3 at distal nodes and scalelike, distinct, hirsutulous.</span> <span class="statement" id="st-d0_s10" data-properties="peduncle orientation;peduncle size"><b>Peduncles </b>erect, slender.</span> <span class="statement" id="st-d0_s11" data-properties="involucral-bract prominence;involucral-bract fusion;involucral-bract size;involucral-bract architecture;whorl quantity;lobe quantity;lobe quantity;lobe quantity"><b>Involucral-</b>bracts obscure, in 2 whorls of 3 plus 2 lobes at proximal nodes, distinct, reduced to 2 lobes at distal nodes, not awn-tipped.</span> <span class="statement" id="st-d0_s12" data-properties="flower quantity;flower architecture;flower architecture"><b>Flowers </b>4–6 per involucral cluster, sessile or pedicellate;</span> <span class="statement" id="st-d0_s13" data-properties="perianth coloration;perianth shape;perianth shape;perianth pubescence">perianth yellow to reddish yellow, broadly campanulate when open, narrowly urceolate when closed, hispidulous abaxially;</span> <span class="statement" id="st-d0_s14" data-properties="whorl tepal quantity;whorl tepal growth form;whorl tepal architecture or shape">tepals 6, slightly dimorphic, those of outer whorl broader and longer than those of inner whorl, entire apically;</span> <span class="statement" id="st-d0_s15" data-properties="stamen quantity">stamens 9;</span> <span class="statement" id="st-d0_s16" data-properties="filament fusion;filament pubescence">filaments basally adnate, pilose basally;</span> <span class="statement" id="st-d0_s17" data-properties="anther coloration;anther shape">anthers yellow, oblong.</span> <span class="statement" id="st-d0_s18" data-properties="achene coloration;achene architecture;achene shape;achene pubescence"><b>Achenes,</b> light reddish-brown, not winged, 3-gonous, pubescent apically.</span> <span class="statement" id="st-d0_s19" data-properties=""><b>Seeds:</b> embryo curved.</span> <span class="statement" id="st-d0_s20" data-properties="embryo course;x chromosome quantity">x = 20.</span><!--

-->{{Treatment/Body
|distribution=Calif.
|discussion=<p>Species 1.</p><!--
--><p>Dedeckera is rare but not endangered or threatened, primarily because most populations are in remote areas along sides of steep canyon walls. Most populations occur in areas managed by the Bureau of Land Management, the United States Forest Service, or the National Park Service. The plants rarely produce mature achenes (D. Wiens et al. 1989). The genus is allied to Eriogonum subg. Eucycla.</p>
|tables=
|references={{Treatment/Reference
|id=nickrent1989a
|text=Nickrent, D. L. and D. Wiens. 1989. Genetic diversity in the rare California shrub Dedeckera eurekensis (Polygonaceae). Syst. Bot. 14: 245–253.
}}{{Treatment/Reference
|id=wiens1986a
|text=Wiens, D., M. DeDecker, and C. D. Wiens. 1986. Observations on the pollination of Dedeckera eurekensis (Polygonaceae). Madroño 33: 302–305.
}}{{Treatment/Reference
|id=wiens1988a
|text=Wiens, D., C. I. Davern, and C. L. Calvin. 1988. Exceptionally low seed set in Dedeckera eurekensis: Is there a genetic component of extinction? In: C. A. Hall and V. Doyle-Jones, eds. 1988. Plant Biology of Eastern California. Los Angeles. Pp. 19–29.
}}{{Treatment/Reference
|id=wiens1989a
|text=Wiens, D. et al. 1989. Developmental failure and loss of reproductive capacity in the rare palaeoendemic shrub Dedeckera eurekensis. Nature 338: 65–67.
}}{{Treatment/Reference
|id=wiens2004a
|text=Wiens, D., L. Allphin, D. H. Mansfield, and G. Thackray. 2004. Developmental failure and loss of reproductive capacity as a factor in extinction: A nine-year study of Dedeckera eurekensis (Polygonaceae). Aliso 21: 55–63.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Dedeckera
|author=James L. Reveal
|authority=Reveal & J. T. Howell
|rank=genus
|parent rank=subfamily
|synonyms=
|basionyms=
|family=Polygonaceae
|distribution=Calif.
|reference=nickrent1989a;wiens1986a;wiens1988a;wiens1989a;wiens2004a
|publication title=Brittonia
|publication year=1976
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V5/V5_897.xml
|subfamily=Polygonaceae subfam. Eriogonoideae
|genus=Dedeckera
|achene architecture=not winged
|achene coloration=light reddish-brown
|achene pubescence=pubescent
|achene shape=3-gonous
|anther coloration=yellow
|anther shape=oblong
|blade arrangement or shape=elliptic
|blade size or width=narrow
|bract architecture or shape=leaflike
|bract fusion=distinct
|bract pubescence=hirsutulous
|bract quantity=2;3
|bract shape=scale-like
|branch architecture=disarticulating;dichotomous
|branch fragility=not brittle
|branch pubescence=hirsutulous
|branch shape=round
|caudex presence=absent
|embryo course=curved
|filament fusion=adnate
|filament pubescence=pilose
|flower architecture=pedicellate;sessile;short-pedicellate
|flower quantity=4;6
|flowering-stem growth form or texture=herbaceous
|flowering-stem location=aerial
|flowering-stem orientation=spreading
|flowering-stem pubescence=hirsutulous
|inflorescence architecture=cymose
|inflorescence position or structure subtype=terminal
|involucral-bract architecture=not awn-tipped
|involucral-bract fusion=distinct
|involucral-bract prominence=obscure
|involucral-bract size=reduced
|leaf arrangement=alternate
|leaf duration=persistent
|leaf life cycle=anthesis
|leaf quantity=1
|lobe quantity=2;2;3
|margin architecture or shape=entire
|node architecture=subsessile;sessile
|node life cycle=anthesis
|node quantity=1
|peduncle orientation=erect
|peduncle size=slender
|perianth coloration=yellow;reddish yellow
|perianth pubescence=hispidulous
|perianth shape=urceolate;campanulate
|petiole presence=absent
|stamen quantity=9
|stem orientation=spreading
|stem pubescence=hirsutulous
|stem texture=woody
|taproot fragility or size=stout
|whole_organism growth form=shrub
|whorl quantity=2
|whorl tepal architecture or shape=entire
|whorl tepal growth form=dimorphic
|whorl tepal quantity=6
|x chromosome quantity=20
}}<!--

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