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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 2012, Eucnide urens, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on September 24, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on September 24, 2018.

Eucnide urens
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© 2010 Steve Matson
Eucnide urens
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© 2012 Neal Kramer
Eucnide urens
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© 2010 Barry Breckling
Eucnide urens
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© 2018 Neal Kramer
Eucnide urens
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© 2016 Christopher L. Christie
Eucnide urens
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© 2018 Neal Kramer

More photos of Eucnide urens in CalPhotos

Geographic subdivisions for Eucnide urens:
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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.
View all CCH records

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.