1. Valuable forage grass of dry upland areas and plains of western North America to northern Mexico
   - silkgrass, silk grass, Indian millet, Oryzopsis hymenoides

Type of: rice grass, ricegrass

• genus Afrocarpus
• genus Afropavo
• genus Agalinis
• genus Agama
• genus Agapanthus
• genus Agapornis
• genus Agaricus
• genus Agastache
• genus Agathis
• genus Agave
• genus Agdestis
• genus Agelaius
• genus Ageratina
• genus Ageratum
• genus Agkistrodon
• genus Aglaomorpha
• genus Aglaonema
• genus Agonus
• genus Agrimonia
• genus Agriocharis
• genus Agrobacterium
• genus Agropyron
• genus Agrostemma
• genus Agrostis
• genus Ailanthus