Mentzelia perennis
Bull. Torrey Bot. Club 25: 260. 1898.
Plants perennial, bushlike, with ground-level caudices. Stems multiple, erect, straight; branches distal, distal longest, antrorse, straight; hairy. Leaves: blade 25–100 × 1–18.1 mm, widest intersinus distance 1–4.2 mm; proximal spatulate to elliptic, margins entire or dentate to pinnatisect, teeth or lobes 0–26, slightly antrorse, 0.6–9.5 mm; distal oblanceolate, elliptic, or lanceolate, base not clasping, margins entire, serrate, or pinnatisect, teeth or lobes 0–24, slightly antrorse, 0.4–7.1 mm; abaxial surface with needlelike and occasionally simple and complex grappling-hook trichomes, adaxial surface with simple grappling-hook and needlelike trichomes. Bracts: margins usually entire, occasionally pinnate. Flowers: petals light yellow, 11.4–19(–22.7) × 1.8–3.6(–5) mm, apex acute, glabrous abaxially; stamens light yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 11–18.1(–22.7) × (0.5–)1–3.7 mm, without anthers, second whorl without anthers; anthers straight after dehiscence, epidermis papillate; styles 7.5–11.4 mm. Capsules cup-shaped, 6.8–12 × (4–)4.8–9.1 mm, base tapering or rounded, not longitudinally ridged. Seeds: coat anticlinal cell walls wavy, papillae 6–14 per cell. 2n = 18.
Phenology: Flowering Jul–Aug.
Habitat: Roadsides, hillside slopes, gypsum-rich soils.
Elevation: 1200–2200 m.
Discussion
Mentzelia perennis is known from central New Mexico.
Selected References
None.