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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 laevicaulis (Douglas ex Hook.) Torr. & A. Gray
Habit: Perennial herb 22--100 cm. Stem: erect, glabrous to hairy. Leaf: lower < 24 cm, oblanceolate, generally pinnately lobed; upper 2--10 cm, lanceolate, generally dentate to serrate. Inflorescence: bracts linear to lanceolate, entire to deeply 4--5-lobed, green. Flower: sepals 15--46 mm; petals 40--80 mm, 8--18 mm wide, adaxially yellow, tip acute; stamens 15--55 mm, filaments of 5 outermost 40--55 mm, 1--2 mm wide, linear, with anthers; style 2.5--7 cm. Fruit: erect, 15--44 mm, 8--13 mm wide, cylindric. Seed: 3--4 mm, 2--2.5 mm wide, lenticular, winged, gray. Chromosomes: 2n=22.
Ecology: Sandy to rocky slopes, washes, roadcuts; Elevation: < 2900 m. Bioregional Distribution: CA (exc DSon); Distribution Outside California: to British Columbia, Montana, Wyoming, Nevada. Flowering Time: May--Oct
eFlora Treatment Author: Joshua M. Brokaw, John J. Schenk & Barry Prigge
Jepson Online Interchange
Previous taxon: Mentzelia jonesii
Next taxon: Mentzelia lindleyi
Citation for this treatment: Joshua M. Brokaw, John J. Schenk & Barry Prigge 2017. Mentzelia laevicaulis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=33250, accessed on February 24, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 24, 2017.