Horseweed (Erigeron canadensis) | View Observations
Erigeron canadensis (synonym Conyza canadensis) is an annual plant native throughout most of North America and Central America. It is also widely naturalized in Eurasia and Australia. Common names include horseweed, Canadian horseweed, Canadian fleabane, coltstail, marestail, and butterweed. It was the first weed to have developed glyphosate resistance, reported in 2001 from Delaware.
Other Names: Erigeron canadensis glabratus, Erigeron canadensis glabrata, Erigeron canadensis pusillus, Canadian Horseweed, 小蓬草, Canadisk Bakkestjerne
Southern Horseweed (Erigeron canadensis var. pusillus) | View Observations
Erigeron canadensis pusillus is a variety of plants with 12 observations
Other Names: Conyza canadensis pusilla
Podosphaera erigerontis-canadensis | View Observations
Podosphaera erigerontis-canadensis is a species of fungi with 93 observations
Other Names: Voikukanhaituhärmä, Canadese-Fijnstraalmeeldauw
Milkweed Watch Montreal/Asclépiade alerte Montréal | View Observations
A project to document milkweed sightings in the Greater Montreal region. It could be enlarged to include Quebec, if needed. Why document them? The aim is to locate Milkweed patches and inform people in the nearby area as to the significance of Milkweed in helping the monarch butterfly survive. Th...
