Galactia elliottii [Elliott's Milkpea]
Gentian, Dwarf [Gentianella germanica]
Gentianella germanica [Dwarf Gentian]
Glycine max [Soybean]
Gnaphalium affine [Cudweed]
Goldenclub [Orontium aquaticum]
Goldenrod, Canadian [Solidago canadensis]
Goldenrod, Stiff [Solidago rigida]
Goldfields, California [Lasthenia californica]
Gonolobus cteniophorus
Good King Henry [Chenopodium bonus-henricus]
Goosegrass, Indian [Eleusine indica]
Gossypium hirsutum [Cotton]
Gracilaria chilensis [Red Algae]
Gracilaria [Red Algae]
Grama, Black [Bouteloua eriopoda]
Grama, Blue [Bouteloua gracilis]
Grama, Sideoats [Bouteloua curtipendula]
Grass, Barnyard [Echinochloa crus-galli]
Grass, Buffel [Cenchrus ciliaris]
Grass, C3 [Agropyron repens]
Grass, C3 [Koeleria cristata]