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LOASACEAE LOASA FAMILY

Larry Hufford & Barry Prigge, except as noted

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

EUCNIDE ROCK-NETTLE
Annual or subshrub; hairs needle-like, stinging, barbed. Leaf: widely ovate to ± round, toothed to ± lobed; base widely tapered to cordate. Inflorescence: cyme, bracted. Flower: petals fused at least at base; stamens epipetalous or fused at base into a short tube; ovary funnel-shaped to hemispheric, placentas 5, stigma lobes 5, generally appressed. Fruit: obovoid to spheric, nodding or reflexed, dehiscent at top by 5 valves. Seed: many, < 1 mm, ± oblong, grooved or ribbed.
14 species: southwestern United States, northern Mexico. (Greek: strongly nettle-like)

Key to Eucnide

E. urens (A. Gray) Parry
NATIVE
Plant 30–100 cm. Leaf: petiole < 5 cm; blade < 10 cm, generally ovate, truncate to cordate, ± irregular-toothed, dull gray-green. Flower: sepals 15–22 mm, 5–7 mm wide, tip acuminate; petals spreading; stamen tube 2–5 mm; stigma ± above anthers. Fruit: 10–20 mm, club-shaped to obconic; pedicel ascending to erect, < 1.5 cm.
2n=42. Cliffs, rocky slopes, washes; < 1400 m. Desert; to southwestern Utah, Arizona, northern Mexico. Apr–Jun [Online Interchange]

Previous taxon: Eucnide rupestris
Next taxon: Mentzelia

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 23 2014
Citation for this treatment: [Author of taxon treatment] 2013. Eucnide, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=25303, accessed on Jul 23 2014

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Bioregions in which Eucnide urens 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.
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map of distribution 1
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.