Difference between revisions of "Mentzelia longiloba"
Ann. Missouri Bot. Gard. 21: 176. 1934.
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| − | |distribution= | + | |distribution=Ariz.;Calif.;Colo.;N.Mex.;Tex.;Utah;n Mexico. |
|discussion=<p>Varieties 4 (3 in the flora).</p><!-- | |discussion=<p>Varieties 4 (3 in the flora).</p><!-- | ||
--><p>Variety pinacatensis J. J. Schenk & L. Hufford is known from the Mexican state of Sonora.</p> | --><p>Variety pinacatensis J. J. Schenk & L. Hufford is known from the Mexican state of Sonora.</p> | ||
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|basionyms= | |basionyms= | ||
|family=Loasaceae | |family=Loasaceae | ||
| − | |distribution= | + | |distribution=Ariz.;Calif.;Colo.;N.Mex.;Tex.;Utah;n Mexico. |
|reference=None | |reference=None | ||
|publication title=Ann. Missouri Bot. Gard. | |publication title=Ann. Missouri Bot. Gard. | ||
|publication year=1934 | |publication year=1934 | ||
|special status=Illustrated | |special status=Illustrated | ||
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|genus=Mentzelia | |genus=Mentzelia | ||
|section=Mentzelia sect. Bartonia | |section=Mentzelia sect. Bartonia | ||
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Latest revision as of 19:11, 6 November 2020
Plants biennial or perennial, bushlike or candelabra-form, perennials with ground-level caudices. Stems solitary, erect, straight; branches distal or along entire stem, distal or proximal longest, antrorse, upcurved; hairy. Leaves: blade 35–112 × 4.3–27.1 mm, widest intersinus distance 2.3–15.3 mm, always on some leaves 4+ mm; proximal oblanceolate to elliptic, margins dentate to pinnate, teeth or lobes 12–30(–50), perpendicular to leaf axis or antrorse, 1–9 mm; distal lanceolate, base not clasping, margins serrate to pinnate, teeth or lobes 8–28, perpendicular to slightly antrorse, 0.8–7.5 mm; abaxial surface with simple grappling-hook, complex grappling-hook, and generally needlelike trichomes, adaxial surface with simple grappling-hook and needlelike trichomes. Bracts: margins entire or toothed to pinnate. Flowers: petals golden yellow, 11.3–20.4 × 2.9–7.2[–8.9] mm, apex acute to rounded, glabrous abaxially; stamens golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 10.4–17.8 × 1.9–5.2[–5.6] mm, with or without anthers, second whorl with anthers; anthers straight after dehiscence, epidermis smooth; styles (5.4–)8.5–10.9(–13) mm. Capsules cup-shaped to cylindric, [7.6–]9.1–16.4 × 5.7–9.2 mm, length usually to 2 times diam., sometimes a few more, base tapering to rounded, not longitudinally ridged. Seeds: coat anticlinal cell walls straight or sinuous, papillae 4–106 per cell.
Distribution
Ariz., Calif., Colo., N.Mex., Tex., Utah, n Mexico.
Discussion
Varieties 4 (3 in the flora).
Variety pinacatensis J. J. Schenk & L. Hufford is known from the Mexican state of Sonora.
Selected References
None.
Lower Taxa
Key
| 1 | Seed coat anticlinal cell walls straight, papillae 4–6 per cell; margins of proximal leaf blades dentate. | Mentzelia longiloba var. chihuahuaensis |
| 1 | Seed coat anticlinal cell walls sinuous, papillae 10–106 per cell; margins of proximal leaf blades pinnate. | > 2 |
| 2 | 5 outermost stamens without anthers; leaf blade margin teeth or lobes perpendicular to leaf axis; seed coat cell papillae 67–106 per cell. | Mentzelia longiloba var. longiloba |
| 2 | 5 outermost stamens with anthers; leaf blade margin teeth or lobes slightly antrorse; seed coat cell papillae 10–21 per cell. | Mentzelia longiloba var. yavapaiensis |