Mentzelia inyoensis

H. J. Thompson & Prigge

Madroño 51: 379, figs. 1, 2. 2004.

Common names: White Mountain or Inyo blazingstar
EndemicConservation concern
Treatment appears in FNA Volume 12. Treatment on page 515. Mentioned on page 501.

Plants biennial, candelabra-form. Stems solitary, erect, straight; branches usually distal, occasionally along entire stem, distal usually longest, antrorse, straight; hairy. Leaves: blade 16.7–89 × 6.3–14.2(–20) mm, widest intersinus distance 3.1–9.7 mm; proximal oblanceolate to elliptic, margins serrate to pinnate, teeth or lobes 10–24, slightly antrorse, 1.4–3.4 mm; distal lanceolate, base usually not clasping, occasionally clasping, margins serrate to pinnate, teeth or lobes 8–14, slightly antrorse, 0.7–7 mm; abaxial surface with complex grappling-hook, and occasionally simple grappling-hook and needlelike, trichomes, adaxial surface with needlelike and occasionally simple grappling-hook trichomes. Bracts: margins usually entire, sometimes toothed. Flowers: petals golden yellow, 11.7–15.8(–18) × 2–4.8 mm, apex acute, glabrous abaxially; stamens golden yellow, 5 outermost not petaloid, filaments linear, not clawed, 10.2–13.2 × 0.6–1.6 mm, with anthers, second whorl with anthers; anthers straight after dehiscence, epidermis smooth; styles 6.7–13 mm. Capsules usually cylindric, rarely cup-shaped, 10.4–25 × 5.5–8.3 mm, base tapering or rounded, not longitudinally ridged. Seeds: coat anticlinal cell walls straight, papillae 3–6 per cell. 2n = 22.

Phenology: Flowering Jun–Aug.
Habitat: Sparsely vegetated, gravelly slopes, gypsum or ash soils.
Elevation: 1400–2000 m.


Mentzelia inyoensis is known only from Inyo and Mono counties, California, and Churchill and Esmeralda counties, Nevada.

Selected References


Lower Taxa

... more about "Mentzelia inyoensis"
John J. Schenk +  and Larry Hufford +
H. J. Thompson & Prigge +
Mentzelia +
White Mountain or Inyo blazingstar +
Calif. +  and Nev. +
1400–2000 m. +
Sparsely vegetated, gravelly slopes, gypsum or ash soils. +
Flowering Jun–Aug. +
Endemic +  and Conservation concern +
Mentzelia inyoensis +
Mentzelia sect. Bartonia +
species +