Mentzelia oligosperma

Nuttall ex Sims

Bot. Mag. 42: plate 1760. 1815

Common names: Chickenthief
IllustratedEndemic
Synonyms: Mentzelia aurea Nuttall
Treatment appears in FNA Volume 12. Treatment on page 529. Mentioned on page 527, 530.

Plants perennial, with caudices. Stems erect, to 50 cm. Leaves: petiole to 3 mm (proximal leaves), absent (distal leaves); blade ovate to hastate, rarely elliptic, basally lobed or unlobed, to 10 × 5 cm, base usually cuneate to truncate, sometimes acute, margins usually serrate, sometimes crenate, rarely entire, apex acute. Pedicels (fruiting) 0–2.5 × 2 mm. Flowers: petals orange, (6–)8–18.5 × (3–)4–10.5 mm, apex cuspidate, hairy abaxially on distal 1/2; stamens 15–45, 5–9.5 mm, filaments monomorphic, filiform; styles 5–10 mm. Capsules subcylindric to clavate, (5–)7–17 × 2–3.5 mm, base tapering gradually, capsule and pedicel not well-differentiated, walls thick, woody. Seeds (1–)2–3(–4) per capsule, oblong, without transverse folds. 2n = 20, 22.


Phenology: Flowering Mar–Oct.
Habitat: Limestone, gypsum, or sandstone rock outcrops or cliffs, clay or loam flats, grasslands, savannas.
Elevation: 0–1800 m.

Distribution

V12 589-distribution-map.jpg

Ariz., Ark., Colo., Ill., Kans., Mo., Nebr., N.Mex., Okla., S.Dak., Tex., Wyo.

Discussion

After Mentzelia aspera, M. oligosperma may be the most widespread member of sect. Mentzelia. Occurring widely across the Great Plains, it also extends eastward into Missouri and western Illinois and across southwestern New Mexico into southeastern Arizona.

Selected References

None.

Lower Taxa

None.

... more about "Mentzelia oligosperma"
Larry Hufford +
Nuttall ex Sims +
Chickenthief +
Ariz. +, Ark. +, Colo. +, Ill. +, Kans. +, Mo. +, Nebr. +, N.Mex. +, Okla. +, S.Dak. +, Tex. +  and Wyo. +
0–1800 m. +
Limestone, gypsum, or sandstone rock outcrops or cliffs, clay or loam flats, grasslands, savannas. +
Flowering Mar–Oct. +
Illustrated +  and Endemic +
Mentzelia aurea +
Mentzelia oligosperma +
Mentzelia sect. Mentzelia +
species +