View source for Mentzelia jonesii

{{Treatment/ID
|accepted_name=Mentzelia jonesii
|accepted_authority=(Urban & Gilg) H. J. Thompson & J. E. Roberts
|publications={{Treatment/Publication
|title=Phytologia
|place=21: 282. 1971
|year=1971
}}
|common_names=Jones’s blazingstar
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}
|basionyms={{Treatment/ID/Synonym
|name=Mentzelia albicaulis var. jonesii
|authority=Urban & Gilg
}}
|synonyms={{Treatment/ID/Synonym
|name=M. californica
|authority=H. J. Thompson & J. E. Roberts
}} {{Treatment/ID/Synonym
|name=M. nitens var. jonesii
|authority=(Urban & Gilg) J. Darlington
}}
|hierarchy=Loasaceae;Mentzelia;Mentzelia sect. Trachyphytum;Mentzelia jonesii
|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 jonesii]]</div></div>
|volume=Volume 12
|mention_page=page 532, 538, 540
|treatment_page=page 537
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>candelabra-form, 20–40(–50) cm. <b>Basal</b> leaves persisting; petiole present or absent; blade linear-lanceolate to linear, margins deeply lobed to dentate. <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 lanceolate, 3.7–5.9 × 0.8–3.9 mm, width 1/8–2/3 length, not concealing capsule, margins entire. <b>Flowers</b>: sepals (2–)4–8(–10) mm; petals yellow to orange proximally, yellow distally, (6–)8–22 mm, apex acute to rounded; stamens 20+, 3–10 mm, filaments monomorphic, filiform, unlobed; styles 4–10 mm. <b>Capsules</b> clavate, 15–38 × 2–4 mm, axillary curved to 180° or S-shaped at maturity, usually inconspicuously longitudinally ribbed. <b>Seeds</b> 15–30, in 2+ rows distal to mid fruit, tan, 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> = 36, 54.</span><!--

-->{{Treatment/Body
|phenology=Flowering Mar–May.
|habitat=Sandy to rocky washes, fans, or flats, creosote-bush scrub, Joshua-tree or saguaro woodlands.
|elevation=200–1500 m.
|distribution=Ariz.;Calif.;Nev.;Utah.
|discussion=<p><i>Mentzelia jonesii</i> is widespread throughout southeastern California and western and southern Arizona. However, tetraploid populations have been found only in California and far northwestern Arizona. Hexaploids in California have previously been called <i>M. californica</i>. The ranges of <i>M. jonesii</i> and the diploid, <i>M. nitens</i>, overlap in southern Inyo County, California, and these species are difficult to distinguish morphologically without mature seeds; sepal and petal lengths, which have sometimes been used to distinguish them, overlap completely.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Mentzelia jonesii
|author=
|authority=(Urban & Gilg) H. J. Thompson & J. E. Roberts
|rank=species
|parent rank=section
|synonyms=M. californica;M. nitens var. jonesii
|basionyms=Mentzelia albicaulis var. jonesii
|family=Loasaceae
|phenology=Flowering Mar–May.
|habitat=Sandy to rocky washes, fans, or flats, creosote-bush scrub, Joshua-tree or saguaro woodlands.
|elevation=200–1500 m.
|distribution=Ariz.;Calif.;Nev.;Utah.
|reference=None
|publication title=Phytologia
|publication year=1971
|special status=Endemic
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V12/V12_18.xml
|genus=Mentzelia
|section=Mentzelia sect. Trachyphytum
|species=Mentzelia jonesii
}}<!--

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