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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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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
Subshrub; hairs barbed. Leaf: linear to ± round, entire to toothed; base tapered to cordate. Inflorescence: raceme, generally terminal; bracts 3 per flower, outer 1 > inner 2. Flower: sepals ± deciduous; petals free or claws adherent, fused below blades; stamens generally 5, free; ovary ± ovoid, placenta 1, stigma 1. Fruit: achene, ± ovoid, generally 5-veined or -ribbed, erect. Seed: 1, 1.5–2.5 mm, ± fusiform, generally smooth.Key to Petalonyx
5 species: southwestern United States, northwestern Mexico. (Greek: petal claw) [Davis & Thompson 1967 Madroño 19:1–32]
Plant 15–100 cm. Leaf: generally sessile, 10–25 mm, linear to narrowly (ob)lanceolate, obtuse to acute, entire to irregularly toothed. Inflorescence: 4–10 cm; outer bract 5–8 mm, ovate to ± round; inner bracts 3–4 mm, ovate, ± cordate, acute to notched, lobed; pedicels 1–2 mm. Flower: petals 2–5.5 mm, free, white; stamens 3–7 mm, ± exserted; style ± 3–6 mm.
Sandy or rocky canyons, generally in creosote-bush scrub; < 1000 m. se Mojave Desert, Sonoran Desert; southwestern Arizona, northwestern Mexico. Mar–May [Online Interchange]
Previous taxon: Petalonyx
Next taxon: Petalonyx nitidus
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 28 2015
Citation for this treatment: [Author of taxon treatment] 2013. Petalonyx, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=37311, accessed on May 28 2015
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|Geographic subdivisions indicated for the distribution of Petalonyx linearis|| 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.
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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 occurence).
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