View source for Helianthus niveus subsp. tephrodes

{{Treatment/ID
|accepted_name=Helianthus niveus subsp. tephrodes
|accepted_authority=(A. Gray) Heiser
|publications={{Treatment/Publication
|title=Mem. Torrey Bot. Club
|place=22(3): 43. 1969
|year=1969
}}
|common_names=Algodones or Algodones dunes sunflower
|special_status={{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}
|basionyms={{Treatment/ID/Basionym
|name=Helianthus tephrodes
|authority=A. Gray
|rank=species
|publication_title=in W. H. Emory, Rep. U.S. Mex. Bound.
|publication_place=2(1): 90. 1859
}}
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Helianthinae;Helianthus;Helianthus niveus;Helianthus niveus subsp. tephrodes
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Helianthinae]]</div><div class="higher-taxon"><small>genus</small>[[Helianthus]]</div><div class="higher-taxon"><small>species</small>[[Helianthus niveus]]</div><div class="higher-taxon"><small>subspecies</small>[[Helianthus niveus subsp. tephrodes]]</div></div>
|volume=Volume 21
|mention_page=
|treatment_page=page 154
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals </b>or perennials, 50–150 cm (taproots stout). <b>Stems</b> erect or decumbent, sericeo-villous (hairs white). <b>Leaves</b> mostly cauline; mostly alternate; petioles 1.5–3.5 cm; blades deltate or deltate-ovate, 3–7 × 2–4 cm, bases cuneate, margins entire or serrulate, abaxial faces densely sericeous, gland-dotted. <b>Heads</b> 1–3. <b>Peduncles</b> 4–17 cm. <b>Involucres</b> hemispheric, 8–28 mm diam. <b>Phyllaries</b> 18–21, lanceolate, 8–10 × 1–3.5 mm, apices shortly attenuate, abaxial faces densely white-canescent. <b>Paleae</b> 8–11 mm, subentire to 3-toothed. <b>Ray</b> florets 10–13; laminae 16–25 mm. <b>Disc</b> florets 50+; corollas 4.5–6 mm, lobes reddish; anthers brownish red, appendages reddish (style branches reddish). <b>Cypselae</b> 4–8 mm, ± villous; pappi of 2(–3) lanceolate scales 1.5–3 mm plus 2–4 obtuse scales 0.5–1 mm. <b>2n</b> = 34.</span><!--

-->{{Treatment/Body
|phenology=Flowering fall–spring.
|habitat=Sand hills
|elevation=50–300 m
|distribution=Ariz.;Calif.;Mexico (Sonora).
|discussion=<p>Of conservation concern.</p><!--
--><p>Subspecies tephrodes differs from subsp. niveus, which is not known to occur north of Mexico, by having less densely hairy phyllaries and generally broader leaves (larger leaves more than 3 cm broad). Both differ from <i>H. petiolaris</i> <i></i>subsp.<i> canescens</i> (<i>H. niveus</i> <i></i>subsp.<i> canescens</i>) by lacking the conspicuous white-villous tufts (“beard”) of the median cusp of the paleae in the center of the head that characterize <i>H. petiolaris</i>.</p><!--
--><p>Subspecies tephrodes is in the Center for Plant Conservation’s National Collection of Endangered Plants.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Helianthus niveus subsp. tephrodes
|authority=(A. Gray) Heiser
|rank=subspecies
|parent rank=species
|synonyms=
|basionyms=Helianthus tephrodes
|family=Asteraceae
|phenology=Flowering fall–spring.
|habitat=Sand hills
|elevation=50–300 m
|distribution=Ariz.;Calif.;Mexico (Sonora).
|reference=None
|publication title=Mem. Torrey Bot. Club
|publication year=1969
|special status=Conservation concern
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_364.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Helianthinae
|genus=Helianthus
|species=Helianthus niveus
|subspecies=Helianthus niveus subsp. tephrodes
}}<!--

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