View source for Mentzelia albicaulis

{{Treatment/ID
|accepted_name=Mentzelia albicaulis
|accepted_authority=(Douglas) Douglas ex Torrey & A. Gray
|publications={{Treatment/Publication
|title=Fl. N. Amer.
|place=1: 534. 1840
|year=1840
}}
|common_names=Whitestem blazingstar
|special_status={{Treatment/ID/Special_status
|code=W
|label=Weedy
}}
|basionyms={{Treatment/ID/Basionym
|name=Bartonia albicaulis
|authority=Douglas in W. J. Hooker
|publication_title=Fl. Bor.-Amer.
|publication_place=1: 222. 1832
}}
|synonyms={{Treatment/ID/Synonym
|name=Mentzelia mojavensis
|authority=H. J. Thompson & J. E. Roberts
}}
|hierarchy=Loasaceae;Mentzelia;Mentzelia sect. Trachyphytum;Mentzelia albicaulis
|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. Trachyphytum]]</div><div class="higher-taxon"><small>species</small>[[Mentzelia albicaulis]]</div></div>
|volume=Volume 12
|mention_page=page 515, 532, 533, 540
|treatment_page=page 534
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>wandlike or candelabra-form, (2–)10–40(–50) cm. <b>Basal</b> leaves persisting; petiole present or absent; blade linear-lanceolate to linear, margins deeply to shallowly lobed. <b>Cauline</b> leaves: petiole absent; blade ovate-lanceolate to linear, to 15 cm, margins deeply to shallowly lobed or entire. <b>Bracts</b> green, ovate to linear, 3.7–8.6 × 0.8–3.9 mm, width 1/6–2/3 length, not concealing capsule, margins 3-lobed or entire, lateral lobes never prominent. <b>Flowers</b>: sepals 1–5 mm; petals orange proximally, yellow distally, 3–7(–8) mm, apex usually acute, rarely retuse; stamens 20+, 3–5 mm, filaments monomorphic, filiform, unlobed; styles 2–5 mm. <b>Capsules</b> clavate, 8–28(–35) × 1.5–3.5 mm, longest capsules usually 15+ mm, axillary curved to 180° at maturity, usually inconspicuously longitudinally ribbed. <b>Seeds</b> 10–30, in 2+ rows distal to mid fruit, dark brown or tan, moderately to densely dark-mottled, usually irregularly polygonal, occasionally triangular prisms proximal to mid fruit, surface tuberculate under 10× magnification; recurved flap over hilum absent; seed coat cell outer periclinal wall domed, domes on seed edges more than 1/2 as tall as wide at maturity. <b>2n</b> = 54, 72.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–Aug.
|habitat=Sand dunes, gravel fans, washes, desert scrub, sagebrush or antelope bitterbrush scrub, open ponderosa pine woodlands, pinyon/juniper woodlands.
|elevation=0–2300 m.
|distribution=B.C.;Sask.;Ariz.;Calif.;Colo.;Idaho;Mont.;Nebr.;Nev.;N.Mex.;Oreg.;S.Dak.;Tex.;Utah;Wash.;Wyo.;Mexico (Baja California;Chihuahua;Sonora).
|discussion=<p><i>Mentzelia albicaulis</i> is the most widespread species in sect. Trachyphytum and exhibits extensive morphological variation. Most populations of <i>M. albicaulis</i> are octoploid; however, hexaploids from southern California that have been called M. mojavensis and occasionally <i>M. californica</i> are also treated here as <i>M. albicaulis</i>. Two tetraploids in sect. Trachyphytum, <i>M. montana</i> and <i>M. obscura</i>, also have been treated previously as <i>M. albicaulis</i> (N. H. Holmgren et al. 2005). Both exhibit morphological forms and distributions overlapping with <i>M. albicaulis</i>. However, in most cases these species can be distinguished without chromosome counts, and their distinctiveness has been supported by phylogenetic analyses (J. M. Brokaw and L. Hufford 2010b).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Mentzelia albicaulis
|author=
|authority=(Douglas) Douglas ex Torrey & A. Gray
|rank=species
|parent rank=section
|synonyms=Mentzelia mojavensis
|basionyms=Bartonia albicaulis
|family=Loasaceae
|phenology=Flowering Mar–Aug.
|habitat=Sand dunes, gravel fans, washes, desert scrub, sagebrush or antelope bitterbrush scrub, open ponderosa pine woodlands, pinyon/juniper woodlands.
|elevation=0–2300 m.
|distribution=B.C.;Sask.;Ariz.;Calif.;Colo.;Idaho;Mont.;Nebr.;Nev.;N.Mex.;Oreg.;S.Dak.;Tex.;Utah;Wash.;Wyo.;Mexico (Baja California;Chihuahua;Sonora).
|reference=None
|publication title=Fl. N. Amer.
|publication year=1840
|special status=Weedy
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V12/V12_190.xml
|genus=Mentzelia
|section=Mentzelia sect. Trachyphytum
|species=Mentzelia albicaulis
}}<!--

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