View source for Tetraneuris acaulis

{{Treatment/ID
|accepted_name=Tetraneuris acaulis
|accepted_authority=(Pursh) Greene
|publications={{Treatment/Publication
|title=Pittonia
|place=3: 265. 1898
|year=1898
}}
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Gaillardia acaulis
|authority=Pursh
|rank=species
|publication_title=Fl. Amer. Sept.
|publication_place=2: 743. 1813 (as Galardia)
}}
|synonyms={{Treatment/ID/Synonym
|name=Hymenoxys acaulis
|authority=(Pursh) K. F. Parker
|rank=species
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Gaillardiinae;Tetraneuris;Tetraneuris acaulis
|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 Gaillardiinae]]</div><div class="higher-taxon"><small>genus</small>[[Tetraneuris]]</div><div class="higher-taxon"><small>species</small>[[Tetraneuris acaulis]]</div></div>
|volume=Volume 21
|mention_page=page 447, 448
|treatment_page=page 451
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 2–30+ cm. <b>Caudices</b> ± branched, branches notably thickened distally. <b>Stems</b> 1–35(–60), erect, unbranched. <b>Leaves</b> all basal, new leaves tightly clustered; blades spatulate or oblanceolate to linear-oblanceolate, entire, glabrous or ± hairy, often lanuginose, sericeous, or strigoso-canescent, eglandular or ± gland-dotted. <b>Heads</b> 1–35(–60) per plant, borne singly. <b>Peduncles</b> 0.5–30 cm, ± hairy. <b>Involucres</b> 7–12 × 8–16 mm. <b>Outer</b> phyllaries 6–12, 3.9–9(–11.5) mm, margins 0–0.4 mm wide, sometimes slightly scarious, abaxial faces ± hairy. <b>Ray</b> florets 8–15(–21); corollas 9–19 mm. <b>Disc</b> florets 25–200+; corollas yellow, 2.7–4.3 mm. <b>Cypselae</b> 2–4 mm; pappi of 5–8 obovate to oblanceolate, aristate scales 2.2–3.7 mm.</span><!--

-->{{Treatment/Body
|distribution=Alta.;Sask.;Ariz.;Calif.;Colo.;Idaho;Kans.;Mont.;N.Dak.;N.Mex.;Nebr.;Nev.;Okla.;S.Dak.;Tex.;Utah;Wyo.
|discussion=<p>Varieties 4 (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 sparsely to densely hairy, often lanuginose, sometimes sericeous, not strigoso-canescent; peduncles 0.5–8(–12) cm; outer phyllaries 6.8–9(–11.5) mm; growing at (2100–)3000–3900 m
|[[Tetraneuris acaulis var. caespitosa|Tetraneuris acaulis var. caespitosa]]
|-id=key-0-1
|1
|Leaves sparsely to densely hairy, often strigoso-canescent; peduncles (1–)5–20(–30) cm; outer phyllaries 4–7.5 mm; growing at 700–2900(–3500) m
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Leaf blades usually densely, sometimes sparsely, strigoso-canescent; e of continental divide (except for 2 reports from nw Idaho)
|[[Tetraneuris acaulis var. acaulis|Tetraneuris acaulis var. acaulis]]
|-id=key-0-2
|2
|Leaf blades glabrous or sparsely to moderately to sometimes densely hairy, not strigoso-canescent; w of continental divide
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Leaf blades glabrous or usually sparsely to moderately or sometimes densely hairy, densely gland-dotted; n Arizona, se California, w Colorado, s Idaho, e Nevada, Utah
|[[Tetraneuris acaulis var. arizonica|Tetraneuris acaulis var. arizonica]]
|-id=key-0-3
|3
|Leaf blades glabrous or sparsely to moderately hairy, at least some (usually most or all) eglandular or sparsely gland-dotted; w Colorado, c, ne Utah, and sw Wyoming
|[[Tetraneuris acaulis var. epunctata|Tetraneuris acaulis var. epunctata]]
|}
</div></div><!--

-->{{#Taxon:
name=Tetraneuris acaulis
|authority=(Pursh) Greene
|rank=species
|parent rank=genus
|synonyms=Hymenoxys acaulis
|basionyms=Gaillardia acaulis
|family=Asteraceae
|distribution=Alta.;Sask.;Ariz.;Calif.;Colo.;Idaho;Kans.;Mont.;N.Dak.;N.Mex.;Nebr.;Nev.;Okla.;S.Dak.;Tex.;Utah;Wyo.
|reference=None
|publication title=Pittonia
|publication year=1898
|special status=Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V19-20-21/V21_1133.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Gaillardiinae
|genus=Tetraneuris
|species=Tetraneuris acaulis
}}<!--

-->[[Category:Treatment]][[Category:Tetraneuris]]