Difference between revisions of "Mentzelia uintahensis"
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|name=Mentzelia multicaulis var. uintahensis | |name=Mentzelia multicaulis var. uintahensis | ||
|authority=N. H. Holmgren & P. K. Holmgren | |authority=N. H. Holmgren & P. K. Holmgren | ||
| + | |rank=variety | ||
|publication_title=Syst. Bot. | |publication_title=Syst. Bot. | ||
|publication_place=27: 758, fig. 5. 2002 | |publication_place=27: 758, fig. 5. 2002 | ||
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name=Mentzelia uintahensis | name=Mentzelia uintahensis | ||
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|authority=(N. H. Holmgren & P. K. Holmgren) J. J. Schenk & L. Hufford | |authority=(N. H. Holmgren & P. K. Holmgren) J. J. Schenk & L. Hufford | ||
|rank=species | |rank=species | ||
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|publication year=2009 | |publication year=2009 | ||
|special status=Endemic | |special status=Endemic | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V12/V12_1104.xml |
|genus=Mentzelia | |genus=Mentzelia | ||
|section=Mentzelia sect. Bartonia | |section=Mentzelia sect. Bartonia | ||
Latest revision as of 19:13, 5 November 2020
Plants perennial, bushlike, with subterranean caudices or rhizomes. Stems multiple, erect, zigzag or straight; branches distal or along entire stem, distal longest or all ± equal, antrorse, upcurved; hairy. Leaves: blade 17–56 × 5.8–28 mm, widest intersinus distance 1–4.9(–6) mm; proximal oblanceolate to elliptic, margins pinnate to pinnatisect, lobes 4–12, antrorse, 1.9–7.7 mm; distal elliptic to lanceolate, base not clasping, margins pinnate to pinnatisect, lobes 4–12, antrorse, 2.6–13.3 mm; abaxial surface with simple grappling-hook and occasionally complex grappling-hook and needlelike trichomes, adaxial surface with simple grappling-hook and needlelike trichomes. Bracts: margins entire. Flowers: petals golden yellow, 8.5–15.2 × 3.8–7.9 mm, apex acute to rounded, glabrous abaxially; stamens golden yellow, 5 outermost petaloid, filaments broadly spatulate, strongly clawed, 5–10.4 × 2.8–6 mm, with anthers, second whorl with anthers; anthers usually twisted after dehiscence, epidermis smooth; styles 5.8–8.5 mm. Capsules cup-shaped, 4.2–8.8 × 3.6–5.8 mm, base tapering to rounded, not longitudinally ridged. Seeds: coat anticlinal cell walls straight, papillae 4–7 per cell. 2n = 22.
Phenology: Flowering May–Sep.
Habitat: Sparsely vegetated steep talus slopes and roadcuts.
Elevation: 1500–2800 m.
Discussion
Mentzelia uintahensis is known from northwestern Colorado (Rio Blanco, Mesa, and Moffat counties) and northeastern Utah (Carbon, Duchesne, and Uintah counties).
Selected References
None.