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FNA | Family List | FNA Vol. 12 | Loasaceae

14. Mentzelia todiltoensis N. D. Atwood & S. L. Welsh, W. N. Amer. Naturalist. 65: 365, fig. 1. 2005.
[C E]

Jemez Mountains blazingstar Jemez Mountains blazingstar

Plants biennial or perennial, bushlike, with ground-level caudices. Stems solitary or multiple, erect, straight; branches distal, distal longest, antrorse, straight; hairy. Leaves: blade 41–121 × 1.5–40 mm, widest intersinus distance 1.1–3.3 mm; proximal oblanceolate, elliptic, or linear, margins entire or serrate to pinnatisect, teeth or lobes 0–26, slightly antrorse, (0.9–)2.4–18.6 mm; distal oblanceolate, elliptic, lanceolate, or linear, base not clasping, margins entire, serrate, or pinnatisect, teeth or lobes 0–22, slightly antrorse, 0.8–18 mm; abaxial surface with needlelike and occasionally simple grappling-hook and/or complex grappling-hook trichomes, adaxial surface with needlelike trichomes. Bracts: margins entire or pinnate. Flowers: petals light to golden yellow, (10.4–)11.7–24.6 × 1.8–5.1 mm, apex acute to rounded, glabrous abaxially; stamens light to golden yellow, 5 outermost petaloid, filaments narrowly spatulate, slightly clawed, 10–21 × 1.4–4 mm, without anthers, second whorl with anthers; anthers twisted or occasionally straight after dehiscence, epidermis papillate; styles 5.5–12.7 mm. Capsules cup-shaped to cylindric, 6.7–20.2 × 4.5–8.5 mm, base tapering or rounded, not longitudinally ridged. Seeds: coat anticlinal cell walls sinuous, papillae 6–12 per cell. 2n = 20.

Flowering Jul–Oct. Hillside slopes, hilltops, hard gypsum-rich clayey soils; of conservation concern; 1600–2200 m; N.Mex.

Mentzelia todiltoensis occurs in northcentral New Mexico.


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