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|Jepson eFlora: Taxon page
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|Family: Loasaceae||View Description||Dichotomous Key|
|Genus: Mentzelia||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Mentzelia albicaulis (Douglas ex Hook.) Douglas ex Torr. & A. Gray
Habit: Annual 5--42 cm. Stem: erect to decumbent, glabrous to hairy. Leaf: 1--11 cm, lower lobed, upper entire to lobed. Inflorescence: bracts lanceolate to ovate, 3-toothed to entire, green, occasionally +- white base, faint, small. Flower: sepals 1--5 mm; petals 2--7(8) mm, ovate to obovate, yellow, base generally orange; stamens 3--5 mm; style 2--5 mm. Fruit: generally curved < 180°, 8--28(34) mm, 1.5--3.5 mm wide, obconic. Seed: 1--1.5 mm, irregular-rounded to -angular above mid-fruit, ×-section occasionally triangular with grooves along longitudinal edges below mid-fruit; tan, dark-mottled, to black; seed coat cells pointed or domed, in age > 1/2 tall as wide on seed surface edges. Chromosomes: 2n=54,72.
Ecology: Sand dunes, gravel fans, washes, creosote-bush scrub, pinyon/juniper woodland; Elevation: < 2300 m. Bioregional Distribution: Teh, SnGb, SnBr, GB, D; Distribution Outside California: to British Columbia, Nebraska, Baja California. Flowering Time: Mar--Jul Note: Intergrades with Mentzelia montana, Mentzelia obscura, Mentzelia veatchiana. If recognized taxonomically, plants with n=27 assignable to Mentzelia californica H.J. Thomps. & J.E. Roberts or Mentzelia mojavensis H.J. Thomps. & J.E. Roberts.
eFlora Treatment Author: Joshua M. Brokaw, John J. Schenk & Barry Prigge
Jepson Online Interchange
Previous taxon: Mentzelia affinis
Next taxon: Mentzelia congesta
Citation for this treatment: Joshua M. Brokaw, John J. Schenk & Barry Prigge 2017. Mentzelia albicaulis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=33221, accessed on April 25, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on April 25, 2017.