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|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 affinis Greene
Habit: Annual 5--47 cm. Stem: erect, hairy. Leaf: 1--17 cm, lower lobed (toothed), upper entire to lobed. Inflorescence: bracts lanceolate to obovate, entire to toothed, green. Flower: sepals 2--7 mm; petals 3--10 mm, generally ovate, yellow, base yellow to orange; stamens < 6.5 mm; style 3--6.5 mm. Fruit: erect to curved < 90°, 12--28 mm, 1--3 mm wide, narrowly cylindric. Seed: 1--2 mm, +- 1 mm wide, +- prism-shaped, ×-section triangular with longitudinal edges grooved, tan, dark-mottled or not; seed coat cells minute. Chromosomes: 2n=18.
Ecology: Rocky or gray-white soils in grassland, woodland, creosote-bush scrub; Elevation: < 1200 m. Bioregional Distribution: s SN, SnJV, se SnFrB (Mount Hamilton), SCoRI, s ChI, TR, SnJt, D; Distribution Outside California: to Arizona, Baja California. Flowering Time: Apr--May Note: Intergrades with Mentzelia dispersa.
eFlora Treatment Author: Joshua M. Brokaw, John J. Schenk & Barry Prigge
Jepson Online Interchange
Previous taxon: Mentzelia
Next taxon: Mentzelia albicaulis
Citation for this treatment: Joshua M. Brokaw, John J. Schenk & Barry Prigge 2017. Mentzelia affinis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=33219, accessed on February 22, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 22, 2017.