nettles

genus Urtica

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

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

iNaturalist is in the process of changing the North American observations of U. dioica to U. gracilis.

slender stinging nettle
Urtica gracilis

50–300 cm tall
leaf blade 6–20 cm
inflorescence raceme- or panicle-like, generally > petiole
fruit ovate

dwarf nettle
Urtica urens

10–60(90) cm tall
leaf blade 1.8–4(6) cm
inflorescence generally ± head- or spike-like, often < petiole
fruit deltate

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 unobserved taxon / 2 keys

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 – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora