View source for Mentzelia laevicaulis

{{Treatment/ID
|accepted_name=Mentzelia laevicaulis
|accepted_authority=(Douglas) Torrey & A. Gray
|publications={{Treatment/Publication
|title=Fl. N. Amer.
|place=1: 535. 1840
|year=1840
}}
|common_names=Giant blazingstar
|special_status={{Treatment/ID/Special_status
|code=W
|label=Weedy
}}{{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Basionym
|name=Bartonia laevicaulis
|authority=Douglas
|rank=species
|publication_title=in W. J. Hooker, Fl. Bor.-Amer.
|publication_place=1: 221, plate 69. 1832
}}
|synonyms=
|hierarchy=Loasaceae;Mentzelia;Mentzelia sect. Bartonia;Mentzelia laevicaulis
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Loasaceae]]</div><div class="higher-taxon"><small>genus</small>[[Mentzelia]]</div><div class="higher-taxon"><small>section</small>[[Mentzelia sect. Bartonia]]</div><div class="higher-taxon"><small>species</small>[[Mentzelia laevicaulis]]</div></div>
|volume=Volume 12
|mention_page=page 501, 505
|treatment_page=page 514
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>biennial or perennial (in rosette stage), bushlike. <b>Stems</b> solitary, erect, straight; branches distal or along entire stem, proximal or distal longest, antrorse, upcurved; hairy or glabrescent. <b>Leaves</b>: blade 17.4–196 × 6.7–40.4 mm, widest intersinus distance 2.4–24.6 mm; proximal oblanceolate, lanceolate, or elliptic, margins pinnate, lobes 14–44, slightly antrorse, 2.5–8.9 mm; distal lanceolate, base clasping or not, margins pinnate, lobes 6–42, slightly antrorse, 2.1–13.8 mm; abaxial surface with simple grappling-hook, complex grappling-hook, and needlelike trichomes, adaxial surface with needlelike trichomes. <b>Bracts</b>: margins entire or pinnate. <b>Flowers</b>: petals golden yellow, 23.5–70 × 3–17.3 mm, apex acute, glabrous abaxially; stamens golden yellow, 5 outermost not petaloid, filaments linear to narrowly elliptic, not clawed, 17.7–55 × 0.5–2(–2.5) mm, with anthers, second whorl with anthers; anthers straight after dehiscence, epidermis smooth; styles 20.4–57 mm. <b>Capsules</b> cup-shaped to cylindric, 10.6–43 × 6.3–11.1 mm, base tapering or rounded, not longitudinally ridged. <b>Seeds</b>: coat anticlinal cell walls straight, papillae 4–11 per cell. <b>2n</b> = 22.</span><!--

-->{{Treatment/Body
|distribution=B.C.;Ariz.;Calif.;Idaho;Mont.;Nev.;Oreg.;Utah;Wash.;Wyo.
|discussion=<p>Varieties 2 (2 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
|Petals 43–70 mm; 5 outermost stamens 39–55 mm.
|[[Mentzelia laevicaulis var. laevicaulis|Mentzelia laevicaulis var. laevicaulis]]
|-id=key-0-1
|1
|Petals 23.5–40 mm; 5 outermost stamens 17.7–29 mm.
|[[Mentzelia laevicaulis var. parviflora|Mentzelia laevicaulis var. parviflora]]
|}
</div></div><!--

-->{{#Taxon:
name=Mentzelia laevicaulis
|authority=(Douglas) Torrey & A. Gray
|rank=species
|parent rank=section
|synonyms=
|basionyms=Bartonia laevicaulis
|family=Loasaceae
|distribution=B.C.;Ariz.;Calif.;Idaho;Mont.;Nev.;Oreg.;Utah;Wash.;Wyo.
|reference=None
|publication title=Fl. N. Amer.
|publication year=1840
|special status=Weedy;Illustrated;Endemic
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V12/V12_538.xml
|genus=Mentzelia
|section=Mentzelia sect. Bartonia
|species=Mentzelia laevicaulis
}}<!--

-->[[Category:Treatment]][[Category:Mentzelia sect. Bartonia]]