Your help is appreciated.    We depend on donations to help keep this site free and up to date for you. Can you please help us?

Urtica

See list of 2 species in this genus
  • 1a. Stipules 5–15 mm long, erect; staminate and carpellate flowers usually in separate inflorescences; inflorescence exceeding the length of the petioles of the subtending leaves; plants perennial from rhizomes
  • 1b. Stipules 1–3 mm long, spreading to deflexed; staminate and carpellate flowers usually in the same inflorescence; inflorescence often shorter than the length of the petioles of the subtending leaves; plants annual from a taproot

 Show photos of:   Each photo represents one species in this genus.