View source for Lasthenia burkei

{{Treatment/ID
|accepted_name=Lasthenia burkei
|accepted_authority=(Greene) Greene
|publications={{Treatment/Publication
|title=Man. Bot. San Francisco,
|place=204. 1894
|year=1894
}}
|common_names=Burke’s goldfields
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}
|basionyms={{Treatment/ID/Basionym
|name=Baeria burkei
|authority=Greene
|rank=species
|publication_title=Bull. Calif. Acad. Sci.
|publication_place=2: 151. 1887
}}
|synonyms=
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Baeriinae;Lasthenia;Lasthenia sect. Ornduffia;Lasthenia burkei
|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 burkei]]</div></div>
|volume=Volume 21
|mention_page=
|treatment_page=page 345
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole-organism some measurement;whole-organism duration"><b>Annuals,</b> to 30 cm.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem architecture;stem pubescence"><b>Stems </b>erect, branched distally, 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;face pubescence"><b>Leaves </b>linear, 10–50 × 1–2+ mm (simple blades or single lobes), margins entire or pinnately lobed, faces glabrous or ± hairy.</span> <span class="statement" id="st-d0_s3" data-properties="involucre shape;involucre shape;involucre some measurement"><b>Involucres </b>hemispheric or obconic, 4–6 mm.</span> <span class="statement" id="st-d0_s4" data-properties="phyllary quantity;phyllary shape;phyllary pubescence"><b>Phyllaries </b>7–16 (distinct), ovate, hairy.</span> <span class="statement" id="st-d0_s5" data-properties="receptacle shape;receptacle shape;receptacle relief;receptacle pubescence;receptacle pubescence"><b>Receptacles </b>conic or dome-shaped, muriculate, glabrous or hairy.</span> <span class="statement" id="st-d0_s6" data-properties="ray-floret quantity"><b>Ray-</b>florets 8–13;</span> <span class="statement" id="st-d0_s7" data-properties="lamina shape;lamina some measurement">laminae oblong to oval, to 6 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, clavate, to 1.5 mm, hairy;</span> <span class="statement" id="st-d0_s10" data-properties="pappus height or length or size;scale atypical quantity;scale quantity;scale shape;scale quantity">pappi usually of 1 (–2) aristate scales plus 3–6+ shorter, ± subulate scales.</span> <span class="statement" id="st-d0_s11" data-properties="scale shape;2n chromosome quantity">2n = 12.</span><!--

-->{{Treatment/Body
|phenology=Flowering Apr–Jun.
|habitat=Vernal pools and wet meadows
|elevation=0–500 m
|distribution=Calif.
|discussion=<p>Of conservation concern.</p><!--
--><p>Lasthenia burkei is known only from relatively few populations in the coast ranges north of San Francisco Bay. It is allopatric from other members of Lasthenia sect. Ornduffia. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.</p>
|tables=
|references={{Treatment/Reference
|id=ornduff1969b
|text=Ornduff, R. 1969. The origin and relationship of Lasthenia burkei (Compositae). Amer. J. Bot. 56: 1042–1047.
}}
}}<!--

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-->{{#Taxon:
name=Lasthenia burkei
|authority=(Greene) Greene
|rank=species
|parent rank=section
|synonyms=
|basionyms=Baeria burkei
|family=Asteraceae
|phenology=Flowering Apr–Jun.
|habitat=Vernal pools and wet meadows
|elevation=0–500 m
|distribution=Calif.
|reference=ornduff1969b
|publication title=Man. Bot. San Francisco,
|publication year=1894
|special status=Endemic;Conservation concern
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21_861.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Baeriinae
|genus=Lasthenia
|section=Lasthenia sect. Ornduffia
|species=Lasthenia burkei
|2n chromosome quantity=12
|anther appendage shape=linear;more or less ovate
|cypsela coloration=gray;black
|cypsela pubescence=hairy
|cypsela shape=clavate
|cypsela some measurement=0mm;1.5mm
|face pubescence=hairy;glabrous
|involucre shape=obconic;hemispheric
|involucre some measurement=4mm;6mm
|lamina shape=oblong;oval
|lamina some measurement=0mm;6mm
|leaf arrangement or course or shape=linear
|leaf length=10mm;50mm
|leaf width=1mm;2mm
|margin shape=lobed;entire
|pappus height or length or size=shorter
|phyllary pubescence=hairy
|phyllary quantity=7;16
|phyllary shape=ovate
|ray-floret quantity=8;13
|receptacle pubescence=hairy;glabrous
|receptacle relief=muriculate
|receptacle shape=dome--shaped;conic
|scale atypical quantity=1;2
|scale quantity=3;6
|scale shape=subulate;aristate
|stem architecture=branched
|stem orientation=erect
|stem pubescence=hairy
|whole-organism duration=annual
|whole-organism some measurement=0cm;30cm
}}<!--

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[[Category:Treatment]]
[[Category:Lasthenia sect. Ornduffia]]
[[Category:Revised Since Print]]