|University of California, Berkeley|
|Directory News Site Map Home|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Annual to subshrub; hairs needle-like, barbed, occasionally stinging. Leaf: alternate [opposite], generally ± pinnate-lobed; stipules 0. Inflorescence: cyme, raceme. Flower: bisexual, radial; sepals generally 5, generally persistent; petals generally 5, free or fused to each other or filament tube; stamens 5–many, filaments thread-like to flat, occasionally fused at base or in clusters; petal-like staminodes occasionally present; pistil 1, ovary inferior, chamber generally 1, placentas generally 3, parietal, style 1. Fruit: capsule or achene. Seed: 1–many.
18+ genera, 250 species: especially America (Africa, Pacific). [Ernst & Thompson 1963 J Arnold Arbor 44:138–142] —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.
Key to Loasaceae
Annual to perennial herb; hairs barbed to needle-like, not stinging; stems pale pink or generally ± white, branched or not. Leaf: linear to ovate, entire to pinnate-lobed; basal in rosettes, generally petioled; cauline generally sessile, ± reduced distally on stem. Inflorescence: generally cyme (or flower 1); bracts green to white, margin green. Flower: sepals lanceolate to deltate, persistent; petals generally 5, free, white to yellow or orange; stamens generally many, ± free, generally unequal, inner filaments generally thread-like; outermost stamens opposite sepal lobes generally modified, ± widened, or petal-like with anther or not; ovary generally cylindric, placentas generally 3, style thread-like, stigma 3-furrowed or -lobed. Fruit: capsule, cup-, barrel-, or urn-shaped to narrowly cylindric, occasionally curved. Seed: generally many, shape variable.Key to Mentzelia
± 100 species: western North America, ± tropical America. [Darlington 1934 Ann Missouri Bot Gard 21:103–226]
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.
2n=54,72. Sand dunes, gravel fans, washes, creosote-bush scrub, pinyon/juniper woodland; < 2300 m. Tehachapi Mountain Area, San Gabriel Mountains, San Bernardino Mountains, Great Basin Floristic Province, Desert; to British Columbia, Nebraska, Baja California. 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. Mar–Jul [Online Interchange]
Unabridged note: Expanded author citation: Mentzelia albicaulis (Douglas ex Hook.) Douglas ex Torr. & A. Gray
Previous taxon: Mentzelia affinis
Next taxon: Mentzelia congesta
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Dec 4 2013
Citation for this treatment: [Author of taxon treatment] 2012. Mentzelia albicaulis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=33221, accessed on Dec 4 2013
Copyright © 2013 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
|Bioregions in which Mentzelia albicaulis occurs||Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.|
Chart based on elevation range in eFlora and elevations and coordinates of CCH records.
Data provided by the participants of the Consortium of California Herbaria.
Note: About half of the CCH records include both elevation and coordinates.
| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records
CCH collections by month