Jepson eFlora: Taxon page
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Eucnide urens

Higher Taxonomy
Family: LoasaceaeView DescriptionDichotomous Key

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.
Genus: EucnideView DescriptionDichotomous Key

Common Name: ROCK-NETTLE
Habit: 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.
Species In Genus: 14 species: southwestern United States, northern Mexico. Etymology: (Greek: strongly nettle-like)

Eucnide urens (A. Gray) Parry
Habit: 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. Chromosomes: 2n=42.
Ecology: Cliffs, rocky slopes, washes; Elevation: < 1400 m. Bioregional Distribution: D; Distribution Outside California: to southwestern Utah, Arizona, northern Mexico. Flowering Time: Apr--Jun
eFlora Treatment Author: Larry Hufford & Barry Prigge
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botanical illustration including Eucnide urens


Citation for this treatment: Larry Hufford & Barry Prigge 2016. Eucnide urens, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 06, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 06, 2016.

Eucnide urens
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© 2014 Aaron Schusteff
Eucnide urens
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© 1998 Larry Blakely
Eucnide urens
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© 2009 Barry Breckling
Eucnide urens
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© 2005 Steve Matson
Eucnide urens
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© 2012 Neal Kramer
Eucnide urens
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© 2010 Steve Matson

More photos of Eucnide urens in CalPhotos

Geographic subdivisions for Eucnide urens:
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.
map of distribution 1
(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.
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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.