|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]
Perennial herb 15–53 cm. Stem: erect, hairy. Leaf: lower 2–9 cm, 6–40 mm wide, oblanceolate to elliptic, ± wavy-dentate, upper shorter, deltate to cordate, base clasping. Inflorescence: bracts linear to lanceolate, entire, green. Flower: sepals 4–11 mm; petals 7–17 mm, 3–5 mm wide, yellow, tip obtuse to round; stamens 3–12 mm, filaments of 5 outermost generally 5–10(14) mm, 1.6–3 mm wide, oblanceolate, tip cut to notched or acute, with anther; style 5–9 mm. Fruit: erect, 5–10 mm, 6–11 mm wide, cup-shaped. Seed: ± 3.5 mm, ± 3 mm wide, lenticular, winged, white.
2n=22. Washes, roadcuts, talus slopes of limestone soils; 150–2200 m. White and Inyo Mountains, Mojave Desert, e Sonoran Desert; southern Nevada. May–Jun [Online Interchange]
Unabridged synonyms: [Mentzelia leucophylla Brandegee, misappl.]
Previous taxon: Mentzelia obscura
Next taxon: Mentzelia pectinata
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 2 2014
Citation for this treatment: [Author of taxon treatment] 2013. Mentzelia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=33271, accessed on Sep 2 2014
Copyright © 2014 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.
|Geographic subdivisions indicated for the distribution of Mentzelia oreophila|| 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.
READ ABOUT YELLOW FLAGS
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
View elevation by latitude chart
| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records
CCH collections by month