XXI. Urticaceae. Nettle Family

Herbs rarely shrubs, with watery juice, belonging to a large family; leaves alternate or opposite, frequently stipulate, simple; flowers a small, dioecious, moncecius or polygamous, variously clustered; fruit an achene.

I. Urtica. (Tourn.) L.

1. U. Lyallii. Wats. Common Nettle.