Jepson eFlora: Taxon page
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Mentzelia montana

Higher Taxonomy
Family: LoasaceaeView DescriptionDichotomous Key

Habit: Annual to subshrub; hairs needle-like, barbed, occasionally stinging. Leaf: alternate [opposite], generally +- pinnate-lobed; stipules 0. Inflorescence: cyme, raceme. Flower: bisexual, radial; sepals generally 5, generally persistent; petals generally 5, free or fused to each other or filament tube; stamens 5--many, filaments thread-like to flat, occasionally fused at base or in clusters; petal-like staminodes occasionally present; pistil 1, ovary inferior, chamber generally 1, placentas generally 3, parietal, style 1. Fruit: capsule or achene. Seed: 1--many.
Genera In Family: 18+ genera, 250 species: especially America (Africa, Pacific).
eFlora Treatment Author: Larry Hufford & Barry Prigge, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: MentzeliaView DescriptionDichotomous Key

Habit: Annual to perennial herb; hairs barbed to needle-like, not stinging; stems pale pink or generally +- white, branched or not. Leaf: linear to ovate, entire to pinnate-lobed; basal in rosettes, generally petioled; cauline generally sessile, +- reduced distally on stem. Inflorescence: generally cyme (or flower 1); bracts green to white, margin green. Flower: sepals lanceolate to deltate, persistent; petals generally 5, free, white to yellow or orange; stamens generally many, +- free, generally unequal, inner filaments generally thread-like; outermost stamens opposite sepal lobes generally modified, +- widened, or petal-like with anther or not; ovary generally cylindric, placentas generally 3, style thread-like, stigma 3-furrowed or -lobed. Fruit: capsule, cup-, barrel-, or urn-shaped to narrowly cylindric, occasionally curved. Seed: generally many, shape variable.
Species In Genus: +- 100 species: western North America, +- tropical America.
eFlora Treatment Author: Joshua M. Brokaw, John J. Schenk & Barry Prigge

Mentzelia montana (Davidson) Davidson & Moxley
Habit: Annual 4--48 cm. Stem: erect, glabrous to hairy. Leaf: < 13 cm, lower lobed, upper entire to lobed. Inflorescence: dense to open; bracts lanceolate to obovate, 3--7-toothed, base +- white. Flower: sepals 1--4 mm; petals 2--6(8) mm, obovate, yellow, base generally orange; stamens 2--7 mm; style 1.5--3.5(6) mm. Fruit: erect to curved < 45°, 6--17(20) mm, 2--3 mm wide, cylindric to obconic. Seed: 1--1.5 mm, irregular-rounded to -angular (edges generally acute), tan, dark-mottled; seed coat cells generally pointed or domed, > 1/2 tall as wide on seed surface edges in age. Chromosomes: 2n=36.
Ecology: Open, generally disturbed slopes, flats, grassland, sagebrush scrub, conifer forest; Elevation: 600--3400 m. Bioregional Distribution: CaR, SN, TR, PR, SNE, n DMtns; Distribution Outside California: to Oregon, Colorado, Texas, northern Mexico. Flowering Time: Apr--Jul Note: Intermediate to Mentzelia congesta, Mentzelia veatchiana; intergrades with Mentzelia ravenii, Mentzelia gracilenta, Mentzelia veatchiana, Mentzelia albicaulis.
eFlora Treatment Author: Joshua M. Brokaw, John J. Schenk & Barry Prigge
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Citation for this treatment: Joshua M. Brokaw, John J. Schenk & Barry Prigge 2016. Mentzelia montana, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 28, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on April 28, 2016.

Mentzelia montana
click for enlargement
© 2009 Gary A. Monroe
Mentzelia montana
click for enlargement
© 2009 Gary A. Monroe
Mentzelia montana
click for enlargement
© 2009 Gary A. Monroe

More photos of Mentzelia montana in CalPhotos

Geographic subdivisions for Mentzelia montana:
CaR, SN, TR, PR, SNE, n DMtns;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.