View source for Symphyotrichum laurentianum

{{Treatment/ID
|accepted_name=Symphyotrichum laurentianum
|accepted_authority=(Fernald) G. L. Nesom
|publications={{Treatment/Publication
|title=Phytologia
|place=77: 286. 1995
|year=1995
}}
|common_names=Gulf of St. Lawrence aster;aster du golfe du Saint-Laurent
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}
|basionyms={{Treatment/ID/Basionym
|name=Aster laurentianus
|authority=Fernald
|rank=species
|publication_title=Rhodora
|publication_place=16: 59, plate 109, figs. 1–5. 1914
}}
|synonyms={{Treatment/ID/Synonym
|name=Aster laurentianus var. contiguus
|authority=Fernald
|rank=variety
}} {{Treatment/ID/Synonym
|name=Aster laurentianus var. magdalenensis
|authority=Fernald
|rank=variety
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Symphyotrichum;Symphyotrichum subg. Symphyotrichum;Symphyotrichum sect. Conyzopsis;Symphyotrichum laurentianum
|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>[[Symphyotrichum]]</div><div class="higher-taxon"><small>subgenus</small>[[Symphyotrichum subg. Symphyotrichum]]</div><div class="higher-taxon"><small>section</small>[[Symphyotrichum sect. Conyzopsis]]</div><div class="higher-taxon"><small>species</small>[[Symphyotrichum laurentianum]]</div></div>
|volume=Volume 20
|mention_page=page 467
|treatment_page=page 500
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Annuals,</b> 1–13+ cm. <b>Stems</b> 1, decumbent to erect (straight), glabrous. <b>Leaves</b> ± fleshy, margins entire, eciliate, apices obtuse, faces glabrous; basal deciduous at bolting, petiolate, blades oblanceolate 44–50 × 5–7 mm [cult.], bases attenuate; proximal cauline and some distal withering by flowering; cauline sessile, blades linear-lanceolate to spatulate, 15–55 × 1–4 mm, reduced distally, bases cuneate; distal sessile, blades linear-lanceolate to spatulate. <b>Heads</b> (disciform) in ± densely paniculiform arrays. <b>Peduncles</b> glabrous, bracts linear. <b>Involucres</b> campanulate, 5–8+mm. <b>Phyllaries</b> in 3–4 series, lanceolate, subequal, bases scarious, margins eciliate, green zones foliaceous (outer), apices obtuse, faces glabrous. <b>Ray</b> florets 0. <b>Pistillate</b> florets 14–47+ in 2–3+ series; laminae 0 (corolla tubes 2–2.4 mm, shorter than style branches). <b>Disc</b> florets 5–8+; corollas yellow, 3.1–3.9 mm, lobes deltate to triangular, 0.2–0.3 mm. <b>Cypselae</b> purple, obovoid, ± compressed, 2.8–2.9 mm, 2–4-nerved, faces strigillose; pappi white to yellowish white, 4.8–5.2 mm. <b>2n</b> = 14.</span><!--

-->{{Treatment/Body
|phenology=Flowering Aug–Sep.
|habitat=Brackish sand and mud, intertidal salt marshes, moist dune slacks
|elevation=0 m
|distribution=N.B.;P.E.I.;Que.
|discussion=<p>Of conservation concern.</p><!--
--><p><i>Symphyotrichum laurentianum</i> is known only from the southern shores of the Gulf of St. Lawrence.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Symphyotrichum laurentianum
|authority=(Fernald) G. L. Nesom
|rank=species
|parent rank=section
|synonyms=Aster laurentianus var. contiguus;Aster laurentianus var. magdalenensis
|basionyms=Aster laurentianus
|family=Asteraceae
|phenology=Flowering Aug–Sep.
|habitat=Brackish sand and mud, intertidal salt marshes, moist dune slacks
|elevation=0 m
|distribution=N.B.;P.E.I.;Que.
|reference=None
|publication title=Phytologia
|publication year=1995
|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_1121.xml
|tribe=Asteraceae tribe Astereae
|genus=Symphyotrichum
|subgenus=Symphyotrichum subg. Symphyotrichum
|section=Symphyotrichum sect. Conyzopsis
|species=Symphyotrichum laurentianum
}}<!--

-->[[Category:Treatment]][[Category:Symphyotrichum sect. Conyzopsis]]