Mentzelia librina

(K. H. Thorne & F. J. Smith) J. J. Schenk & L. Hufford

Novon 19: 119. 2009.

Common names: Book Cliffs stickleaf
EndemicConservation concern
Basionym: Mentzelia multicaulis var. librina K. H. Thorne & F. J. Smith Great Basin Naturalist 46: 556, fig. 1. 1986
Treatment appears in FNA Volume 12. Treatment on page 511. Mentioned on page 500.

Plants perennial, bushlike, with subterranean caudices or rhizomes. Stems multiple, erect, zigzag; branches distal or along entire stem, distal longest or all ± equal, antrorse, straight to upcurved; hairy. Leaves: blade 14–26.3 × 5.1–10.8 mm, widest intersinus distance 2.3–5.2 mm; proximal oblanceolate to elliptic, margins usually 3-fid, rarely entire or pinnate, teeth or lobes usually 2, rarely 0 or 4, perpendicular to leaf axis, 0.8–2.7 mm; distal elliptic, base not clasping, margins 3-fid to occasionally pinnate, teeth or lobes usually 2, occasionally 4, perpendicular to leaf axis, 1.5–3.5 mm; abaxial surface with simple grappling-hook and complex grappling-hook trichomes, adaxial surface with simple grappling-hook and needlelike trichomes. Bracts: margins usually entire, rarely pinnate. Flowers: petals golden yellow, 8.3–13.6 × 2.6–4.8 (–6.2) mm, apex acute, glabrous abaxially; stamens golden yellow, 5 outermost petaloid, filaments broadly spatulate, strongly clawed, 6–8 (–9.1) × 2.3–4.4 mm, with anthers, second whorl with anthers; anthers straight after dehiscence, epidermis smooth; styles 5–7.9 mm. Capsules cupshaped, 4–7.3 × 3.3–5.8 mm, base rounded, not longitudinally ridged. Seeds: coat anticlinal cell-walls straight, papillae 4–5 per cell.


Phenology: Flowering Jun–Sep.
Habitat: Barren gray soils, steep shale slopes.
Elevation: 1700–2100 m.

Discussion

Mentzelia librina in narrowly distributed along the border between Carbon and Emery counties.

Selected References

None.

Lower Taxa

None.

No values specified."not elongating" is not a number.

... more about "Mentzelia librina"
petaloid +  and heteromorphic +
0.8 cm8 mm <br />0.008 m <br /> (0.91 cm9.1 mm <br />0.0091 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
clawed +  and spatulate +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
John J. Schenk +  and Larry Hufford +
(K. H. Thorne & F. J. Smith) J. J. Schenk & L. Hufford +
ridged +  and rounded +
Mentzelia multicaulis var. librina +
1.4 cm14 mm <br />0.014 m <br /> (2.63 cm26.3 mm <br />0.0263 m <br />) +
unlobed;lobed;orbiculate;obovate;unlobed;lobed;orbiculate;obovate;unlobed;lobed;orbiculate;obovate;oblanceolate;spatulate;linear;lanceolate;elliptic;ovate;cordate;deltate;hastate +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
along entire stem +  and distal +
0.4 cm4 mm <br />0.004 m <br /> (0.73 cm7.3 mm <br />0.0073 m <br />) +
cup-shaped +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.58 cm5.8 mm <br />0.0058 m <br />) +
subterranean +
Book Cliffs stickleaf +
all +  and longest +
upcurved +  and antrorse +
1700–2100 m. +
curved +  and straight +
s--shaped +, clavate +, urceolate +, ovoid +, cylindric +, subcylindric +, lingulate +  and cup-shaped +
Barren gray soils, steep shale slopes. +
free +  and adnate +
unlobed +  and filiform +
cauline +  and basal +
perpendicular +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
pinnate +  and entire +
3-fid +  and occasionally pinnate +
apical +, subapical +  and inferior +
perpendicular +  and oriented +
inconspicuous +
0.48 cm4.8 mm <br />0.0048 m <br /> (0.62 cm6.2 mm <br />0.0062 m <br />) +
golden yellow +
connate +  and distinct +
8.3mm;13.6mm +
spreading +  and erect +
hairy +  and glabrous +
obovate +, oblanceolate +, elliptic +, ovate +  and spatulate +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
Flowering Jun–Sep. +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
flattened +  and ovoid +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
persistent +
lanceolate +  and narrowly ovate +
Endemic +  and Conservation concern +
golden yellow +
adnate +, free +  and distinct +
included +  and exserted +
papillate +
3-lobed +  and lingulate +
0.5 cm5 mm <br />0.005 m <br /> (0.79 cm7.9 mm <br />0.0079 m <br />) +
Mentzelia librina +
Mentzelia sect. Bartonia +
species +
perpendicular +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
dendritic +  and unbranched +
sinuous +  and straight +
plant +  and bushlike +