Common Name: LOASA FAMILY Habit: 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. Genera In Family: 18+ genera, 250 species: especially America (Africa, Pacific). eFlora Treatment Author: Larry Hufford & Barry Prigge, except as noted Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Common Name: BLAZING STAR Habit: Annual to perennial herb, sometimes subshrub-like; 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-centered, 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 often modified, +- widened, or petal-like, with or without anthers 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, sometimes winged.
eFlora Treatment Author: Joshua M. Brokaw, John J. Schenk, Barry Prigge & David Keil Reference: Schenk & Hufford 2020 Syst Bot Monogr 110:1--230
Mentzelia jonesii (Urb. & Gilg) H.J. Thomps. & J.E. Roberts
NATIVE Habit: Annual 5--40 cm. Stem: erect to decumbent, glabrous to hairy. Leaf: < 14 cm, entire to lobed. Inflorescence: bracts lance-ovate, entire, green. Flower: sepals 2--8(10) mm; petals (6)8--22 mm, ovate to obovate, yellow, base yellow to orange; stamens 3--10 mm; style 4--10 mm. Fruit: curved < 180° or S-shaped, 15--38 mm, 2--4 mm wide, obconic; seed rows +- 3 distal to mid-fruit. Seed: +- 1 mm, irregular-rounded to irregular-angular distal to mid-fruit, ×-section occasionally triangular with longitudinal edges grooved proximal to mid-fruit, tan, dark-mottled or not; seed coat cells generally pointed or domed, in age > 1/2 tall as wide on seed surface edges. Chromosomes: 2n=36,54. Ecology: Sandy to rocky washes, fans, flats, roadsides; Elevation: 200--1450 m. Bioregional Distribution: W&I, D; Distribution Outside California: Nevada, Arizona. Flowering Time: Mar--May Note: Intergrades with Mentzelia nitens, Mentzelia albicaulis. If recognized taxonomically, plants with n=27 assignable to Mentzelia californica H.J. Thomps. & J.E. Roberts (in part). Jepson eFlora Author: Joshua M. Brokaw, John J. Schenk, Barry Prigge & David Keil Reference: Schenk & Hufford 2020 Syst Bot Monogr 110:1--230 Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Previous taxon: Mentzelia inyoensis Next taxon: Mentzelia laevicaulis var. laevicaulis
Citation for this treatment: Joshua M. Brokaw, John J. Schenk, Barry Prigge & David Keil 2023, Mentzelia jonesii, in Jepson Flora Project (eds.) Jepson eFlora, Revision 12, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=33248, accessed on October 04, 2024.
Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on October 04, 2024.
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(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 occurrence).
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Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month
Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).