--_The Relative Abundance of Plants in an Area of Alfalfa, Grasses, and Weeds_[A] Percentage by number Species of plants Quackgrass (_Agropyron repens_) 30 Speargrass (_Poa annua_) 1 California brome (_Bromus carinatus_) 1 Smooth brome (_Bromus inermis_) 1 Alfalfa (_Medicago sativa_) 25 Peppergrass (_Lepidium densiflorum_) 2 Cleavers (_Galium aparine_) 15 Wild lettuce (_Lactuca scariola_) 25 TABLE 2.
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