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|Family: Loasaceae||View Description||Dichotomous Key|
|Genus: Mentzelia||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Mentzelia congesta Torr. & A. Gray
Habit: Annual 7--40 cm. Stem: erect, glabrous to hairy. Leaf: 1--9 cm, entire to lobed. Inflorescence: dense; outer bract widely ovate, toothed to lobed, +- concealing fruit; inner bract +- fused to ovary, obovate, +- toothed to lobed; lower 3/4 of bracts white-scarious, margin green. Flower: sepals 1--4 mm; petals 3--7(9) mm, obovate, pale yellow to yellow, base orange; stamens +- = style; style 1.5--5 mm. Fruit: generally erect, 5--12 mm, 2--3 mm wide, cylindric. Seed: +- 1 mm, irregular-angular with concave sides, tan, dark-mottled or not; seed coat cells generally domed, < 1/2 tall as wide in age. Chromosomes: 2n=18.
Ecology: Disturbed slopes, pine forest, sagebrush scrub, pinyon/juniper woodland; Elevation: 1200--2700 m. Bioregional Distribution: SNH (e slope), Teh, WTR, SnGb, PR, SNE, DMtns; Distribution Outside California: to Idaho. Flowering Time: May--Jul
Synonyms: Mentzelia congesta var. davidsoniana (Abrams) J.F. Macbr.
eFlora Treatment Author: Joshua M. Brokaw, John J. Schenk & Barry Prigge
Jepson Online Interchange
Previous taxon: Mentzelia albicaulis
Next taxon: Mentzelia crocea
Citation for this treatment: Joshua M. Brokaw, John J. Schenk & Barry Prigge 2017. Mentzelia congesta, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=33230, accessed on January 18, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on January 18, 2017.