Jepson eFlora: Taxon page
Vascular Plants of California
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon

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.
Etymology: (Greek: strongly nettle-like)
eFlora Treatment Author: Larry Hufford & Barry Prigge
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
Jepson eFlora Author: Larry Hufford & Barry Prigge
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

Previous taxon: Eucnide rupestris
Next taxon: Mentzelia

Name Search

Botanical illustration including Eucnide urens

botanical illustration including Eucnide urens

Please use this Google Form for Contact/Feedback

Citation for this treatment: Larry Hufford & Barry Prigge 2012, Eucnide urens, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on March 01, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on March 01, 2024.

Eucnide urens
click for enlargement
©2018 Neal Kramer
Eucnide urens
click for enlargement
©2012 Neal Kramer
Eucnide urens
click for enlargement
©2014 California Academy of Sciences
Eucnide urens
click for enlargement
©2018 Neal Kramer
Eucnide urens
click for enlargement
©2018 Neal Kramer

More photos of Eucnide urens
in CalPhotos

Geographic subdivisions for Eucnide urens:
1. You can change the display of the base map layer control box in the upper right-hand corner.
2. County and Jepson Region polygons can be turned off and on using the check boxes.
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).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
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.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

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).