View source for Heterotheca sessiliflora subsp. sessiliflora

{{Treatment/ID
|accepted_name=Heterotheca sessiliflora subsp. sessiliflora
|accepted_authority=unknown
|publications=
|common_names=Beach goldenaster
|basionyms=
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Heterotheca;Heterotheca sessiliflora;Heterotheca sessiliflora subsp. sessiliflora
|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 sessiliflora]]</div><div class="higher-taxon"><small>subspecies</small>[[Heterotheca sessiliflora subsp. sessiliflora]]</div></div>
|volume=Volume 20
|mention_page=page 241, 244
|treatment_page=page 238
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>1–30, decumbent to ascending-erect, sparsely to moderately hispid, densely stipitate-glandular distally. <b>Cauline</b> leaves sessile, blades lanceolate, 9–16(–21) × 4–7 mm, reduced distally, bases rounded, margins strongly undulate, proximal large cilia grading into distal, small ones, faces moderately to densely hispido-strigose, sparsely to moderately glandular; distal green, not stiff, faces usually sparsely to moderately, rarely densely hispido-strigose, densely stipitate-glandular. <b>Peduncle</b> bracts 3–6, proximal lanceolate, leafy, sometimes distally reduced and phyllary-like, often 1–3+ larger, leaflike bracts subtending, equaling or surpassing heads. <b>Involucres</b> (7–)8.4–10.4(–11) mm. <b>Ray</b> florets 14–24; laminae 5–9(–11) mm. <b>Disc</b> florets: corolla lobes sparsely pilose (hairs 0.15–0.4 mm). <b>Cypsela</b> faces sparsely strigose. <b>2n</b> = 18.</span><!--

-->{{Treatment/Body
|phenology=Flowering (Mar–)Jun–Sep+.
|habitat=Coastal dunes, strand, mud flats
|elevation=0–60 m
|distribution=Calif.;Mexico (Baja California).
|discussion=<p>The peak blooming period for subsp. sessiliflora is mid to late summer, but rare individuals can produce some heads throughout much of the year (San Diego County to northern Baja California). The type comes from Santa Barbara, where the subspecies now appears to be extinct. The plants vary greatly in habit. Some are sometimes short and herbaceous, the shoots dying back at the end of the growth season. In the northern Baja California coastal dunes are meter-high shrubs, the shoots of which have not been killed back to rootstock level. The shift from densely hairy proximal cauline leaves to densely glandular distal ones occurs abruptly in some shoots and gradually in others. The subspecies has become very rare in California.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Heterotheca sessiliflora subsp. sessiliflora
|author=
|authority=unknown
|rank=subspecies
|parent rank=species
|synonyms=
|basionyms=
|family=Asteraceae
|phenology=Flowering (Mar–)Jun–Sep+.
|habitat=Coastal dunes, strand, mud flats
|elevation=0–60 m
|distribution=Calif.;Mexico (Baja California).
|reference=None
|publication title=
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V19-20-21/V20_524.xml
|tribe=Asteraceae tribe Astereae
|genus=Heterotheca
|species=Heterotheca sessiliflora
|subspecies=Heterotheca sessiliflora subsp. sessiliflora
}}<!--

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