Mentzelia torreyi var. acerosa

(M. E. Jones) Barneby

Leafl. W. Bot. 5: 63. 1947.

Endemic
Basionym: Mentzelia acerosa M. E. Jones Contr. W. Bot. 17: 30 1930
Treatment appears in FNA Volume 12. Treatment on page 530.

Flowers: petals 4.5–8 mm, orangish yellow, orange, or burnt orange; stamens 7–14 mm, longest usually much more than 1 mm longer than petals.


Phenology: Flowering May–Jul.
Habitat: Sagebrush scrub.
Elevation: 700–1000 m.

Discussion

Variety acerosa is known from southwestern Idaho (Ada, Elmore, Gooding, Owyhee, and Twin Falls counties).

Selected References

None.

Lower Taxa

None.

"not elongating" is not a number.

monomorphic +
unlobed +  and filiform +
rounded +
Larry Hufford +
(M. E. Jones) Barneby +
Mentzelia acerosa +
0 cm0 mm <br />0 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
obovate;ovate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0 cm0 mm <br />0 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
ovoid +  and urceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
subterranean +
700–1000 m. +
curved +  and straight +
s--shaped +, clavate +, urceolate +, ovoid +, cylindric +, subcylindric +, lingulate +  and cup-shaped +
Sagebrush scrub. +
free +  and adnate +
flattened +  and filiform +
cauline +  and basal +
pinnatisect +, toothed +  and entire +
apical +, subapical +  and inferior +
0 cm0 mm <br />0 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0 cm0 mm <br />0 m <br /> (?) +
inconspicuous +
burnt orange +, orange +  and orangish yellow +
connate +  and distinct +
4.5mm;17mm +
spreading +  and erect +
hairy +  and glabrous +
narrowly spatulate +  and obovate +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering May–Jul. +
5 cm50 mm <br />0.05 m <br /> (?) +
Leafl. W. Bot. +
ovoid +  and bottle-shaped +
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 +
adnate +, free +  and distinct +
included +  and exserted +
25 +  and 45 +
0.7 cm7 mm <br />0.007 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
decumbent +, clambering +  and erect +
5 cm50 mm <br />0.05 m <br /> (25 cm250 mm <br />0.25 m <br />) +
papillate +
3-lobed +  and lingulate +
0.7 cm7 mm <br />0.007 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Mentzelia torreyi var. acerosa +
Mentzelia torreyi +
variety +
dendritic +  and unbranched +
sinuous +