Forming a tree to large shrub, 3-6 m tall, bark grayish and smooth. Betula occidentalis . Quercus macrocarpa . Ulmus americana or Ulmus pumila . Cultivated along streets and in yards throughout Montana.
Bisexual flowers produce small samaras .
Humulus lupulus . Cultivated but persisting around old homesteads, occasionally escaping. Urtica dioica . Chorispora tenella . Annual, petals pinkish, fruits linear, weedy throughout much of the drier lower elevations parts of Montana.