|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
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|Family: Loasaceae||View Description||Dichotomous Key|
|Genus: Mentzelia||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Mentzelia desertorum (Davidson) H.J. Thomps. & J.E. Roberts
Habit: Annual 5--41 cm. Stem: erect, glabrous to hairy. Leaf: 1--12 cm, lower toothed to lobed, upper entire to lobed. Inflorescence: bracts lanceolate to ovate, generally entire, green. Flower: sepals 2--4 mm; petals 2.5--6 mm, ovate to obovate, yellow, base yellow to orange; stamens = style; style 2--4 mm. Fruit: generally curved < 180°, 12--27 mm, 1--2.5 mm wide, obconic. Seed: +- 1 mm, irregular-rounded to -angular above mid-fruit, ×-section occasionally triangular with grooves along longitudinal edges below mid-fruit, tan, not or sparsely dark-mottled; seed coat cells generally flat-surfaced in age. Chromosomes: 2n=18.
Ecology: Sandy flats in creosote-bush scrub; Elevation: < 950 m. Bioregional Distribution: D; Distribution Outside California: Baja California. Flowering Time: Feb--Mar Note: Intergrades with Mentzelia obscura.
eFlora Treatment Author: Joshua M. Brokaw, John J. Schenk & Barry Prigge
Jepson Online Interchange
Previous taxon: Mentzelia crocea
Next taxon: Mentzelia dispersa
Citation for this treatment: Joshua M. Brokaw, John J. Schenk & Barry Prigge 2016. Mentzelia desertorum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=33235, accessed on May 28, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 28, 2016.