slender stinging nettle

Urtica gracilis

Member of nettles (genus Urtica)
nettle family (family Urticaceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

There are no other wild members of this species in California.

Adaxial leaf surfaces rarely have stinging hairs, and never more than a few.

american stinging nettle
Urtica gracilis ssp. gracilis

non-stinging hairs on abaxial leaf veins appressed
stem green

hoary nettle
Urtica gracilis ssp. holosericea

non-stinging hairs on abaxial leaf veins erect
stem gray-green[?]

Toxicity of nettle, stinging (Urtica spp.):
1 – Skin contact with these plants can cause symptoms ranging from redness, itching, and rash to painful blisters like skin burns.

2 observed taxons / 1 key

Chris’s observations: 43 (17 are research grade)

Locations:

Russian Ridge OSP: 8
Butano SP: 3
Murray Ranch SP: 3
Purisima Creek Redwoods OSP: 3
Bear Creek Redwoods OSP: 2
Castle Rock SP: 2
San Pedro Valley CP: 2
Sweeney Ridge National Recreation Area: 2
Wunderlich CP: 2
Andrew Molera SP
Coal Creek OSP
Dr. Aurelia Reinhardt Redwood RP
El Corte de Madera OSP
Huckleberry Botanic RP
Jacks Peak CP
Joaquin Miller Park, Oakland
Lake Chabot RP
Mt. Madonna SP
Mt. Tamalpais Watershed
Nisene Marks SP
Sam McDonald CP
Sibley Volcanic RP
Stevens Creek CP
Sunol Wilderness RP
Windy Hill OSP

Months:

Jan.: 2
Feb.: 1
Mar.: 4
Apr.: 2
May: 7
Jun.: 6
Jul.: 9
Aug.: 6
Sep.: 3
Oct.: 1
Nov.: 2

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Taxon info: iNaturalist – Calflora – CalPhotos – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora