View source for Heterotheca zionensis

{{Treatment/ID
|accepted_name=Heterotheca zionensis
|accepted_authority=Semple
|publications={{Treatment/Publication
|title=Brittonia
|place=39: 384, fig. 4. 1987
|year=1987
}}
|common_names=Zion goldenaster
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Heterotheca;Heterotheca zionensis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Astereae]]</div><div class="higher-taxon"><small>genus</small>[[Heterotheca]]</div><div class="higher-taxon"><small>species</small>[[Heterotheca zionensis]]</div></div>
|volume=Volume 20
|mention_page=page 231, 234, 244, 249
|treatment_page=page 248
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 17–55(–70) cm; taprooted. <b>Stems</b> 1–20+, ascending to erect (sometimes ± brittle, green to light-green proximally, greenish to whisith distally), moderately to densely hispid and short-strigose, abundantly long-hispid, sometimes becoming moderately hairy and densely stipitate-glandular distally. <b>Leaves</b>: proximal cauline petiolate to subsessile, blades (whitish when fresh, drying grayish to whitish green) narrowly to broadly oblanceolate, 15–45 × 5–8 mm, bases attenuate, margins flat, entire, strigoso-ciliate, proximally long-hispido-strigose, apices acute, faces densely hispido-strigose, sparsely to moderately stipitate-glandular; distal sessile, blades narrowly to broadly ovate or lanceolate to oblong, 10–20(–30) × 2.5–7.3 mm, reduced distally, densely to very densely hispido-strigose, moderately to densely stipitate-glandular beneath hairs. <b>Heads</b> 7–27(–46) in corymbiform arrays, branches ascending. <b>Peduncles</b> 9–41 mm, moderately to densely hispido-strigose, moderately to densely stipitate-glandular; bracts 0–5, proximal lanceolate, much reduced distally; linear to oblanceolate, leaflilke bracts sometimes subtending heads. <b>Involucres</b> cylindro-turbinate to narrowly campanulate, (4.3–)5–7.5(–8) mm. <b>Phyllaries</b> in 5–6 series, lanceolate, unequal (outer lengths 1/5–1/4 inner), margins scarious, faces either sparsely hispido-strigose and densely stipitate-glandular or moderately hispido-strigose and sparsely to moderately stipitate-glandular. <b>Ray</b> florets 8–18(–23); laminae 6.5–13 × 1–1.7 mm. <b>Disc</b> florets (11–)16–44(–62); corollas ± ampliate, (3.5–)4.5–7 mm, lobes 0.4–0.7 mm, sparsely pilose (hairs on lobes 0.1–0.3 mm). <b>Cypselae</b> monomorphic, obconic, compressed, 1.5–3(–4) mm, ribs ca. 10, faces moderately strigose; pappi off-white, outer of linear scales 0.25–0.5 mm, inner of 25–40 weakly clavate bristles 4–7 mm. <b>2n</b> = 18, 36.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Aug(–Oct).
|habitat=Rocky, sandy, or sandy loam soils, deep sand, open places, sand dunes, sandy ledges of rock outcrops, margins of hot springs, edges of washes, cottonwood-lined washes and flood plains, grasslands, dry waste ground in juniper-pinyon scrub, roadsides
|elevation=900–2700 m
|distribution=Ariz.;N.Mex.;Utah.
|discussion=<p>Of conservation concern.</p><!--
--><p><i>Heterotheca zionensis</i> grows in eastern Arizona and Utah; it is introduced and established in the vicinity of Las Cruces, New Mexico; chance introductions (likely emphemeral) have been found in Moffat County, Colorado, and Franklin County, Idaho. Whitish-appearing stems and leaves readily distinguish <i>H. zionensis</i> from <i>H. villosa </i>var.<i> scabra</i>, which frequently occurs sympatrically in southern Utah and northern Arizona. The species could be confused also with <i>H. villosa </i>var.<i> pedunculata</i> which has more hairs/mm2 on its leaves and few or no glands on its phyllaries. It could also be confused with narrow, smaller-leaved forms of <i>H. fulcrata </i>var.<i> amplifolia</i>, which has a few petiolate-ovate bracts subtending the heads.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Heterotheca zionensis
|authority=Semple
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering Jun–Aug(–Oct).
|habitat=Rocky, sandy, or sandy loam soils, deep sand, open places, sand dunes, sandy ledges of rock outcrops, margins of hot springs, edges of washes, cottonwood-lined washes and flood plains, grasslands, dry waste ground in juniper-pinyon scrub, roadsides
|elevation=900–2700 m
|distribution=Ariz.;N.Mex.;Utah.
|reference=None
|publication title=Brittonia
|publication year=1987
|special status=Endemic;Conservation concern
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V19-20-21/V20_543.xml
|tribe=Asteraceae tribe Astereae
|genus=Heterotheca
|species=Heterotheca zionensis
}}<!--

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