View source for Mentzelia densa

{{Treatment/ID
|accepted_name=Mentzelia densa
|accepted_authority=Greene
|publications={{Treatment/Publication
|title=Pittonia
|place=3: 99. 1896
|year=1896
}}
|common_names=Royal Gorge blazingstar;Arkansas Canyon stickleaf
|special_status={{Treatment/ID/Special_status
|code=E
|label=Endemic
}}{{Treatment/ID/Special_status
|code=C
|label=Conservation concern
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Nuttallia densa
|authority=(Greene) Greene
|rank=species
}}
|hierarchy=Loasaceae;Mentzelia;Mentzelia sect. Bartonia;Mentzelia densa
|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 densa]]</div></div>
|volume=Volume 12
|mention_page=page 502
|treatment_page=page 522
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>biennial, bushlike. <b>Stems</b> solitary, decumbent to erect, straight; branches along entire stem, distal or proximal longest, antrorse, straight or upcurved, proximal decumbent; hairy. <b>Leaves</b>: blade 32–86 × 5.8–15 mm, widest intersinus distance 1.7–5.2(–7.1) mm; proximal oblanceolate to elliptic, margins dentate to pinnate, teeth or lobes 6–12, perpendicular to leaf axis, 1.2–6.3 mm; distal elliptic to lanceolate, base not clasping, margins dentate to pinnate, teeth or lobes 4–10, perpendicular to leaf axis, 1.8–5.2 mm; abaxial surface with simple grappling-hook, complex grappling-hook, and occasionally needlelike trichomes, largest trichomes without pearly white bases, adaxial surface with simple grappling-hook and needlelike trichomes. <b>Bracts</b>: margins entire or toothed. <b>Flowers</b>: petals golden yellow, 14.2–19.8 × 3.8–6.5 mm, apex acute to rounded, glabrous abaxially; stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 12–18.1 × 2.7–4.8 mm, with or without anthers, second whorl with anthers; anthers straight after dehiscence, epidermis smooth; styles 8.3–11.1 mm. <b>Capsules</b> cylindric, 12.2–18 × 4.3–8.3 mm, base tapering, not longitudinally ridged. <b>Seeds</b>: coat anticlinal cell walls wavy, papillae 7–17 per cell. <b>2n</b> = 20.</span><!--

-->{{Treatment/Body
|phenology=Flowering Jun–Aug.
|habitat=Moist canyon walls, lower talus slopes, gravelly and sandy soils.
|elevation=1600–2400 m.
|distribution=Colo.
|discussion=<p><i>Mentzelia densa</i> is known only from Chaffee and Fremont counties. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.</p>
|tables=
|references=
}}<!--

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-->{{#Taxon:
name=Mentzelia densa
|authority=Greene
|rank=species
|parent rank=section
|synonyms=Nuttallia densa
|basionyms=
|family=Loasaceae
|phenology=Flowering Jun–Aug.
|habitat=Moist canyon walls, lower talus slopes, gravelly and sandy soils.
|elevation=1600–2400 m.
|distribution=Colo.
|reference=None
|publication title=Pittonia
|publication year=1896
|special status=Endemic;Conservation concern
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V12/V12_335.xml
|genus=Mentzelia
|section=Mentzelia sect. Bartonia
|species=Mentzelia densa
}}<!--

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