View source for Mentzelia congesta

{{Treatment/ID
|accepted_name=Mentzelia congesta
|accepted_authority=Torrey & A. Gray
|publications={{Treatment/Publication
|title=Fl. N. Amer.
|place=1: 534. 1840
|year=1840
}}
|common_names=United or congested blazingstar;flower baskets
|special_status={{Treatment/ID/Special_status
|code=F
|label=Selected by author to be illustrated
}}{{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Acrolasia davidsoniana
|authority=Abrams
}}{{Treatment/ID/Synonym
|name=Mentzelia congesta var. davidsoniana
|authority=(Abrams) J. F. Macbride
}}
|hierarchy=Loasaceae;Mentzelia;Mentzelia sect. Trachyphytum;Mentzelia congesta
|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 congesta]]</div></div>
|volume=Volume 12
|mention_page=page 525, 533, 540, 541
|treatment_page=page 535
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>wandlike or candelabra-form, 7–40(–50) cm. <b>Basal</b> leaves persisting; petiole present or absent; blade linear-lanceolate to linear, margins usually deeply to shallowly lobed, rarely entire. <b>Cauline</b> leaves: petiole present or absent (proximal leaves), absent (distal leaves); blade linear-lanceolate to linear (proximal leaves), ovate-lanceolate (distal leaves), to 9 cm, margins deeply to shallowly lobed or entire. <b>Bracts</b> mostly white with green margins, conspicuous and showy, outer broadly ovate, inner obovate, outer 7–14.7 × 4.2–10.4 mm, inner 4.1–5.8 × 2.7–3.5 mm, width 1/2–7/8 length, concealing capsule, margins usually deeply 3–9-lobed to toothed, rarely entire. <b>Flowers</b>: sepals 1–4 mm; petals orange proximally, pale yellow to yellow distally, 2–8(–10) mm, apex retuse; stamens 20–40, 1.5–5 mm, filaments monomorphic, filiform, unlobed; styles 1.5–5 mm. <b>Capsules</b> cylindric or clavate, 5–12 × 2–3 mm, axillary curved to 10° at maturity, usually inconspicuously longitudinally ribbed. <b>Seeds</b> 10–25, in 2+ rows distal to mid fruit, tan, dark-mottled or not, irregularly polygonal, surface tessellate under 10× magnification; recurved flap over hilum absent; seed coat cell outer periclinal wall domed, domes on seed edges less than 1/2 as tall as wide at maturity. <b>2n</b> = 18.</span><!--

-->{{Treatment/Body
|phenology=Flowering May–Jul.
|habitat=Disturbed slopes, sagebrush scrub, pinyon/juniper woodlands, pine forests.
|elevation=1200–2700 m.
|distribution=Calif.;Idaho;Nev.;Oreg.
|discussion=<p>Mentzelia congesta is easily distinguished from other species in sect. Trachyphytum by its large, mostly white bracts. However, the bracts of M. congesta are strikingly similar to those of M. involucrata in sect. Bicuspidaria (see discussion under 53. M. involucrata). Phylogenetic studies suggest that the genome of M. congesta is present in more than half of the polyploid taxa in sect. Trachyphytum, including all species that exhibit bracts with partially white bases (J. M. Brokaw and L. Hufford 2010b).</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Mentzelia congesta
|author=
|authority=Torrey & A. Gray
|rank=species
|parent rank=section
|synonyms=Acrolasia davidsoniana;Mentzelia congesta var. davidsoniana
|basionyms=
|family=Loasaceae
|phenology=Flowering May–Jul.
|habitat=Disturbed slopes, sagebrush scrub, pinyon/juniper woodlands, pine forests.
|elevation=1200–2700 m.
|distribution=Calif.;Idaho;Nev.;Oreg.
|reference=None
|publication title=Fl. N. Amer.
|publication year=1840
|special status=Selected by author to be illustrated;Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V12/V12_284.xml
|genus=Mentzelia
|section=Mentzelia sect. Trachyphytum
|species=Mentzelia congesta
}}<!--

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