1st Place with 111 points:
: "Purple Loosestrife (Lythrum salicaria)Introduced from Europe early 1800's; crowds out native species. Pic is from Iowa along Mississippi River in July."
2nd Place with 75 points:
: "Thistle - a noxious weed from Europe.
Actually has a rather attractive flower favored by garden aviators. Here w/ a Snowberry Clearwing Hummingbird Moth
central Illinois (August)"
3rd Place with 70 points:
: "one of the most invasive plants I have ever planted... Morning Glory"
Runner Up with 64 points:
: "Although beautiful, the water hyacinth (Eichhornia crassipes) can be deadly. Water hyacinth mats degrade water quality by blocking the air-water interface and greatly reducing oxygen levels in the water, eliminating underwater animals such as fish and crowding out native plants. "
Runner Up with 56 points:
: "The first year in our new home (zone 6a) - no sign of Wisteria. The second year we restored our pond and waterfall to working order. And then...WISTERIA everywhere! It even climbed a 30ft tall pine tree!"
Runner Up with 40 points:
: "Portulaca pilosa, pink purslane. A typical purslane, blooms early morn and closes late afternoon. Thrives in hot sunny and dry environments. Readily reseeds and thus considered invasive. A nice edging and rock garden color during dog days of summer in Zone 7b. ."
Runner Up with 30 points:
: "Dandelion (Taraxacum officinale) whilst having a pretty yellow flower it can soon become an unwanted weed in New Zealand lawns."
Runner Up with 29 points:
: "Yellow star thistle"Click here to view all entries in this category.Back to the contest main page.