View source for Lasthenia conjugens

{{Treatment/ID
|accepted_name=Lasthenia conjugens
|accepted_authority=Greene
|publications={{Treatment/Publication
|title=Pittonia
|place=1: 221. 1888
|year=1888
}}
|common_names=Contra Costa goldfields
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Baeria fremontii var. conjugens
|authority=(Greene) Ferris
|rank=variety
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Baeriinae;Lasthenia;Lasthenia sect. Ornduffia;Lasthenia conjugens
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Asteraceae]]</div><div class="higher-taxon"><small>tribe</small>[[Asteraceae tribe Heliantheae]]</div><div class="higher-taxon"><small>subtribe</small>[[Asteraceae (tribe Heliantheae) subtribe Baeriinae]]</div><div class="higher-taxon"><small>genus</small>[[Lasthenia]]</div><div class="higher-taxon"><small>section</small>[[Lasthenia sect. Ornduffia]]</div><div class="higher-taxon"><small>species</small>[[Lasthenia conjugens]]</div></div>
|volume=Volume 21
|mention_page=page 344
|treatment_page=page 345
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole-organism some measurement;whole-organism duration"><b>Annuals,</b> to 40 cm.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem architecture;stem pubescence;stem pubescence"><b>Stems </b>erect, branched distally, glabrous or sparsely hairy.</span> <span class="statement" id="st-d0_s2" data-properties="leaf arrangement or course or shape;leaf length;leaf width;margin shape;margin shape;face pubescence"><b>Leaves </b>linear, 10–80 × 1–2+ mm (simple blades or single lobes), margins entire or pinnately lobed, faces glabrous.</span> <span class="statement" id="st-d0_s3" data-properties="involucre shape;involucre shape;involucre some measurement"><b>Involucres </b>hemispheric or obconic, 6–10 mm.</span> <span class="statement" id="st-d0_s4" data-properties="phyllary quantity;phyllary shape;phyllary pubescence"><b>Phyllaries </b>12–18 (connate 1/4–1/2 their lengths), ± lanceolate, puberulent to glabrate.</span> <span class="statement" id="st-d0_s5" data-properties="receptacle shape;receptacle shape;receptacle pubescence"><b>Receptacles </b>dome-shaped or obconic, densely hairy.</span> <span class="statement" id="st-d0_s6" data-properties="ray-floret quantity"><b>Ray-</b>florets 6–13;</span> <span class="statement" id="st-d0_s7" data-properties="lamina shape;lamina some measurement">laminae oblong to oval, 5–10 mm.</span> <span class="statement" id="st-d0_s8" data-properties="anther appendage shape"><b>Anther </b>appendages linear to ± ovate.</span> <span class="statement" id="st-d0_s9" data-properties="cypsela coloration;cypsela coloration;cypsela shape;cypsela some measurement;cypsela pubescence"><b>Cypselae </b>black or gray (reflective), clavate, to 1.5 mm, glabrous;</span> <span class="statement" id="st-d0_s10" data-properties="pappus presence;2n chromosome quantity">pappi 0.2n = 12.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Jun.
|habitat=Vernal pools and wet meadows
|elevation=0–100 m
|distribution=Calif.
|discussion=<p>Of conservation concern.</p><!--
--><p>Lasthenia conjugens often germinates under water in vernal pools; first leaves are submerged and entire; later, aerial leaves are pinnatifid.</p>
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Lasthenia conjugens
|authority=Greene
|rank=species
|parent rank=section
|synonyms=Baeria fremontii var. conjugens
|basionyms=
|family=Asteraceae
|phenology=Flowering Mar–Jun.
|habitat=Vernal pools and wet meadows
|elevation=0–100 m
|distribution=Calif.
|reference=None
|publication title=Pittonia
|publication year=1888
|special status=Endemic;Conservation concern
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21_862.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Baeriinae
|genus=Lasthenia
|section=Lasthenia sect. Ornduffia
|species=Lasthenia conjugens
|2n chromosome quantity=12
|anther appendage shape=linear;more or less ovate
|cypsela coloration=gray;black
|cypsela pubescence=glabrous
|cypsela shape=clavate
|cypsela some measurement=0mm;1.5mm
|face pubescence=glabrous
|involucre shape=obconic;hemispheric
|involucre some measurement=6mm;10mm
|lamina shape=oblong;oval
|lamina some measurement=5mm;10mm
|leaf arrangement or course or shape=linear
|leaf length=10mm;80mm
|leaf width=1mm;2mm
|margin shape=lobed;entire
|pappus presence=absent
|phyllary pubescence=puberulent;glabrate
|phyllary quantity=12;18
|phyllary shape=lanceolate
|ray-floret quantity=6;13
|receptacle pubescence=hairy
|receptacle shape=obconic;dome--shaped
|stem architecture=branched
|stem orientation=erect
|stem pubescence=hairy;glabrous
|whole-organism duration=annual
|whole-organism some measurement=0cm;40cm
}}<!--

-->[[Category:Treatment]][[Category:Lasthenia sect. Ornduffia]]