Stinging Nettle
Urtica dioica subsp. gracilis (U. gracilis)

Family: Nettle (Urticaceae)
AKA:
Photo taken on: August 11, 2008
Location: Ditch Trail, GV, CO
Life Zones: Plains to montane
Habitat: Moist areas and stream-sides

Grows to 6 feet tall with spikes of tiny, greenish brown flowers. Male and female flowers are usually on the same plant, female flowers curve down, male flowers point up. Leaves and stems have tiny, stinging hairs.

Flora of North America reference.

Stinging Nettle
Urtica dioica subsp. gracilis (U. gracilis)

Photo taken on: June 4, 2009
Location: Bandelier National Monument., NM