tokens: Other plants of the EAC include little barley ( " Hordeum pusillum " ) , goosefoot or lambsquarters ( " Chenopodium berlandieri " ) , erect knotweed ( " Polygonum erectum " ) , maygrass ( " Phalaris caroliniana " ) , sumpweed or marsh elder ( " Iva annua " ) , and sunflower ( " Helianthus annuus " ) .