View source for Lasthenia sect. Ptilomeris

{{Treatment/ID
|accepted_name=Lasthenia sect. Ptilomeris
|accepted_authority=(Nuttall) Ornduff
|publications={{Treatment/Publication
|title=Univ. Calif. Publ. Bot.
|place=40: 75. 1966
|year=1966
}}
|basionyms={{Treatment/ID/Basionym
|name=Undefined sect. Ptilomeris
|authority=Nuttall
|rank=section
|publication_title=Trans. Amer. Philos. Soc., n. s.
|publication_place=7: 381. 1841
}}
|synonyms={{Treatment/ID/Synonym
|name=Baeria sect. Ptilomeris
|authority=(Nuttall) H. M. Hall
|rank=section
}}
|hierarchy=Asteraceae;Asteraceae tribe Heliantheae;Asteraceae (tribe Heliantheae) subtribe Baeriinae;Lasthenia;Lasthenia sect. Ptilomeris
|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. Ptilomeris]]</div></div>
|volume=Volume 21
|mention_page=page 337, 344
|treatment_page=page 346
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole-organism duration"><b>Annuals.</b></span> <span class="statement" id="st-d0_s1" data-properties="leaf shape;leaf shape;leaf architecture or shape"><b>Leaves </b>usually pinnately lobed or pinnatifid, sometimes entire.</span> <span class="statement" id="st-d0_s2" data-properties="involucre shape"><b>Involucres </b>hemispheric to obconic.</span> <span class="statement" id="st-d0_s3" data-properties="phyllary life cycle;phyllary fusion"><b>Phyllaries </b>falling with cypselae, distinct.</span> <span class="statement" id="st-d0_s4" data-properties="receptacle shape;receptacle relief;receptacle relief;receptacle relief;receptacle relief;receptacle relief;receptacle pubescence;receptacle pubescence"><b>Receptacles </b>conic, smooth, muricate, or pitted, glabrous or hairy.</span> <span class="statement" id="st-d0_s5" data-properties="ray corolla coloration;lamina some measurement;floral pigment coloration;aqueou density"><b>Ray </b>corollas yellow, laminae 1–10 mm, floral pigments remaining yellow in dilute aqueous alkali.</span> <span class="statement" id="st-d0_s6" data-properties="corolla lobe quantity"><b>Disc </b>corolla lobes 5;</span> <span class="statement" id="st-d0_s7" data-properties="anther appendage shape">anther appendages ovate to obovate;</span> <span class="statement" id="st-d0_s8" data-properties="style apex shape;style apex pubescence;style apex pubescence">style apices ± deltate, glabrous or with apical tufts of hairs and subapical fringes of shorter hairs.</span> <span class="statement" id="st-d0_s9" data-properties=""><b>Cypselae </b>1.5–3 mm;</span> <span class="statement" id="st-d0_s10" data-properties="">epappose or pappose.</span> <span class="statement" id="st-d0_s11" data-properties="cypsela some measurement;cypsela architecture;cypsela architecture;2n chromosome quantity;2n chromosome quantity">2n = 8, 10.</span><!--

-->{{Treatment/Body
|distribution=w North America;nw Mexico
|discussion=<p>Species 3 (3 in the flora).</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Stems usually glandular-puberulent (herbage sweetly scented)
|[[Lasthenia coronaria|Lasthenia coronaria]]
|-id=key-0-1
|1
|Stems glabrous or hairy (at nodes and distally), or ± woolly (herbage not sweetly scented)
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Ray laminae 1–3 mm; pappi 0, or of 4–6(–12) aristate scales plus 4–5+ shorter, laciniate scales; coastal and offshore; British Columbia, California, Oregon, Washington
|[[Lasthenia maritima|Lasthenia maritima]]
|-id=key-0-2
|2
|Ray laminae 4–8 mm; pappi 0, or of 2–3(–4) aristate scales plus 4–5+ shorter, fimbri-ate scales; coastal and inland; c California
|[[Lasthenia minor|Lasthenia minor]]
|}
</div></div><!--

-->{{#Taxon:
name=Lasthenia sect. Ptilomeris
|authority=(Nuttall) Ornduff
|rank=section
|parent rank=genus
|synonyms=Baeria sect. Ptilomeris
|basionyms=Undefined sect. Ptilomeris
|family=Asteraceae
|distribution=w North America;nw Mexico
|reference=None
|publication title=Univ. Calif. Publ. Bot.
|publication year=1966
|special status=
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V21_866.xml
|tribe=Asteraceae tribe Heliantheae
|subtribe=Asteraceae (tribe Heliantheae) subtribe Baeriinae
|genus=Lasthenia
|section=Lasthenia sect. Ptilomeris
|2n chromosome quantity=10;8
|anther appendage shape=ovate;obovate
|aqueou density=dilute
|corolla lobe quantity=5
|cypsela architecture=pappose;epappose
|cypsela some measurement=1.5mm;3mm
|floral pigment coloration=yellow
|involucre shape=hemispheric;obconic
|lamina some measurement=1mm;10mm
|leaf architecture or shape=entire
|leaf shape=pinnatifid;lobed
|phyllary fusion=distinct
|phyllary life cycle=falling
|ray corolla coloration=yellow
|receptacle pubescence=hairy;glabrous
|receptacle relief=pitted;muricate;pitted;muricate;smooth
|receptacle shape=conic
|style apex pubescence=with apical tufts;glabrous
|style apex shape=deltate
|whole-organism duration=annual
}}<!--

-->[[Category:Treatment]][[Category:Lasthenia]]