View source for Heterotheca marginata

{{Treatment/ID
|accepted_name=Heterotheca marginata
|accepted_authority=Semple
|publications={{Treatment/Publication
|title=Rev. Heterotheca Pyllotheca,
|place=83, fig. 20. 1996
|year=1996
}}
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Heterotheca;Heterotheca marginata
|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 marginata]]</div></div>
|volume=Volume 20
|mention_page=page 231, 233, 244
|treatment_page=page 245
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Perennials,</b> 38–80 cm, herbage abundantly long-hirsute; taprooted. <b>Stems</b> 1–40, ascending to erect (sometimes reddish brown proximally, brittle), sometimes arching, hispido-scabrous (axillary leaf fascicles often present). <b>Leaves</b>: cauline stiff; proximal petiolate, blades oblanceolate, (180–)240–550 × 4–7(–9) mm, bases convex-cuneate, margins entire, strigoso-ciliate, with many long-hispido-strigose cilia all along, apices acute, mucronate, faces sparsely to moderately, coarsely hispido-scabrous, sparsely stipitate-glandular; distal sessile, blades oblanceolate, 14–31 × 3.3–5.2 mm, reduced distally, apices acute. <b>Heads</b> 8–50(–78), in open paniculiform arrays. <b>Peduncles</b> 12–29 mm, moderately to densely hispido-strigose, sparsely stipitate-glandular; bracts 0–3, linear-oblanceolate, usually greatly reduced, rarely leaflike and linear-oblanceolate, sparsely to moderately hispido-scabrous, sparsely stipitate-glandular. <b>Involucres</b> campanulate, 6.5–9(–10) mm. <b>Phyllaries</b> in 4–5 series, narrowly triangular-lanceolate, unequal (outer lengths 1/5–1/4 inner), scarious, faces moderately strigose (larger hairs to 1 mm), eglandular to sparsely stipitate-glandular. <b>Ray</b> florets 10–15; laminae 9–14.5 × 1-2.5 mm. <b>Disc</b> florets (25–)31–46(–50); corollas barely ampliate, 4.5–7.5 mm, tubes and throats glabrate, lobes 0.4–0.9 mm, glabrous or glabrate (hairs 0.1–0.2–0.3 mm). <b>Cypselae</b> monomorphic, obconic, compressed, 1.5–3.2 mm, ribs 8–10 (sometimes brownish), faces moderately strigose; pappi off-white, outer of linear scales 0.5–1 mm, inner of 35–45 bristle 4.6–7.4 mm, longest acute to weakly clavate. <b>2n</b> = 18, 36.</span><!--

-->{{Treatment/Body
|phenology=Flowering (Feb–)Oct(–Nov).
|habitat=Gravelly soils and crevices in sandstone outcrops, roadside margins and banks, dry hillsides, desert grassland hillsides around streams, chaparral transition areas
|elevation=600–900 m
|distribution=Ariz.
|discussion=<p>Of conservation concern.</p><!--
--><p><i>Heterotheca marginata</i> grows in the Superstition and Pinal mountains. It is characterized by its numerous, long, hispido-strigose hairs along the entire margins of its distal leaves and peduncle bracts. The hairs give the plants a light gray-green appearance from a distance. The leaves are stiff, unlike other taxa in the section. It is similar to <i>H. fulcrata </i>var.<i> arizonica</i>, which is more glandular and typically has narrowly ovate to lanceolate bracts subtending smaller heads, and <i>H. fulcrata </i>var.<i> senilis</i>, which can be similar in indument but typically has more ovate leaves and heads subtended by narrowly ovate to lanceolate bracts.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Heterotheca marginata
|authority=Semple
|rank=species
|parent rank=genus
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering (Feb–)Oct(–Nov).
|habitat=Gravelly soils and crevices in sandstone outcrops, roadside margins and banks, dry hillsides, desert grassland hillsides around streams, chaparral transition areas
|elevation=600–900 m
|distribution=Ariz.
|reference=None
|publication title=Rev. Heterotheca Pyllotheca,
|publication year=1996
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/eaa6e58056e40c9ef614d8f47aea294977a1a5e9/coarse_grained_fna_xml/V19-20-21/V20_536.xml
|tribe=Asteraceae tribe Astereae
|genus=Heterotheca
|species=Heterotheca marginata
}}<!--

-->[[Category:Treatment]][[Category:Heterotheca]]