Stinging Nettle: Urtica dioica ssp. dioica - Not native.
American Stinging Nettle, California Nettle: Urtica dioica ssp. gracilis (Synonyms: Urtica gracilis, Urtica lyallii) - Native.
Giant Creek Nettle, Hoary Nettle, Mountain Nettle, Stinging Nettle: Urtica diocia ssp. holosericea (Synonym: Urtica holosericea) - Native
Annual Stinging Nettle, Dwarf Nettle: Urtica urens - Not native.