View source for Lessingia arachnoidea

{{Treatment/ID
|accepted_name=Lessingia arachnoidea
|accepted_authority=Greene
|publications={{Treatment/Publication
|title=Leafl. Bot. Observ. Crit.
|place=2: 29. 1910
|year=1910
}}
|common_names=Crystal Springs lessingia
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Lessingia hololeuca var. arachnoidea
|authority=(Greene) J. T. Howell
}} {{Treatment/ID/Synonym
|name=Lessingia micradenia var. arachnoidea
|authority=(Greene) Ferris
}}
|hierarchy=Asteraceae;Asteraceae tribe Astereae;Lessingia;Lessingia arachnoidea
|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>[[Lessingia]]</div><div class="higher-taxon"><small>species</small>[[Lessingia arachnoidea]]</div></div>
|volume=Volume 20
|mention_page=page 453
|treatment_page=page 457
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>15–80 cm. <b>Stems</b> erect, tan, glabrous or villous. <b>Leaves</b>: basal withering by flowering; cauline margins entire, faces eglandular, abaxial glabrous or villous. <b>Heads</b> borne singly, at ends of branchlets. <b>Involucres</b> obconic, 4–8 mm. <b>Phyllaries</b> purple-tipped, faces arachnose, sometimes gland-dotted; inner scarious. <b>Disc</b> florets (3–)8–18; corollas pink to lavender (color more intense in tubes); style-branch appendages truncate-penicillate, 0.1–0.3 mm. <b>Pappi</b> tan, usually shorter than cypselae, sometimes forming coronas, rarely equaling or longer than cypselae (Sonoma County). <b>2n</b> = 10.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jul–Oct.
|habitat=Grasslands, coastal scrub, chaparral, woodlands, serpentinite soils
|elevation=100–300 m
|distribution=Calif.
|discussion=<p>Of conservation concern.</p><!--
--><p><i>Lessingia arachnoidea</i> is known from near Crystal Springs Reservoir in San Mateo County and near Camp Meeker in Sonoma County. Previous circumscriptions of <i>L. arachnoidea</i> (pappi shorter than cypselae, forming coronas) have been expanded to include plants (from Sonoma County) with pappi equaling or longer than cypselae. Alternatively, the plants with longer pappi could have been accommodated in <i>L. ramulosa</i> (as a glandless form); the absence of basal leaves at flowering and the presence of arachnoid indument on the phyllaries suggest a closer affinity to <i>L. arachnoidea</i>.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Lessingia arachnoidea
|author=
|authority=Greene
|rank=species
|parent rank=genus
|synonyms=Lessingia hololeuca var. arachnoidea;Lessingia micradenia var. arachnoidea
|basionyms=
|family=Asteraceae
|phenology=Flowering Jul–Oct.
|habitat=Grasslands, coastal scrub, chaparral, woodlands, serpentinite soils
|elevation=100–300 m
|distribution=Calif.
|reference=None
|publication title=Leafl. Bot. Observ. Crit.
|publication year=1910
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V19-20-21/V20_1057.xml
|tribe=Asteraceae tribe Astereae
|genus=Lessingia
|species=Lessingia arachnoidea
}}<!--

-->[[Category:Treatment]][[Category:Lessingia]]