Hostas are familiar to all of us, ubiquitous in almost every garden in Canada and the US. A quick search on the Explore page reveals 1,500 observations of hostas at ‘Needs ID’ or ‘Research Grade’ in North America. I suspect almost all of these are cultivated plants. I propose that we tackle the task of flagging as many of these as “captive/cultivated” as possible.
While we’re at it, can you think of any other commonly cultivated plants that with a large number of un-flagged observations? Feel free to post them here. Other examples that come to mind are Juniperus horizontalis, Forsythia spp., Cercis canadensis, etc.
P.S. there are rare naturalized populations of hostas in North America. Here’s a great example of a presumably naturalized population: https://www.inaturalist.org/observations/41009023
P.P.S. this topic is North America-centric, as this is where I live and the region I’m familiar with. I believe most hosta observations worldwide are probably cultivated.