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Genus Urtica
- a nettle yielding fiber resembling flax
Genus Helxine
- one species; a dwarf creeping mat-forming evergreen herb
Genus Soleirolia
- one species; a dwarf creeping mat-forming evergreen herb
Genus Laportea
- mostly tropical stinging herbs or trees: nettle
Genus Parietaria
- small genus of stingless herbs
Genus Pilea
- low-growing tropical perennials grown for their stingless foliage
Genus Pipturus
- an Australian genus of woody plants of the family Urticaceae
Genus Cannabis
- hemp: genus of coarse annuals native to central Asia and widely naturalized in north temperate regions; in some classifications included in the family Moraceae
Genus Humulus
- hops: hardy perennial vines of Europe, North America and central and eastern Asia producing a latex sap; in some classifications included in the family Urticaceae