invasive_weeds

#1 

Mugwort (Artemisia vulgaris) 

When the foliage is crushed it is known to release a pungent odor. One plant can produce as much as 200,000 seeds which are roughly 1mm in diameter. These seeds spread not only by the wind but are easily picked up and carried via typical lawn maintenance equipment (mowers). 

#2 

Yellow Nutsedge (Cyperus esculentus) 

Nutsedge is a perennial, growing from seed & rhizomes, resist typical control methods (pulling this weed leaves a 'nutlet' allowing the plant to return). This weed will grow faster than your grass, usually a brighter green, brightly standing out in your lawn. 

#3

Japanese Stiltgrass (Microstegium vimineum) 

Areas infested with Japanese stiltgrass have decreased biodiversity. It thrives as a weed in lawns and gardens. A tell-tale sagittal stripe on the leaf helps with identification. Japanese stiltgrass can produce large numbers of seeds – from 16,000 to 50,000 seeds per square meter.