There are lots of plants in the sidewalk cracks, in your yard, or in other similar places that aren't cultivated and aren't native. Some of the species have likely spread from cultivated plants or other sources.

IF you are in San Diego County and have a species with a known or probable source, you are free to put it here. I'd also suggest and appreciate that you note whatever you observed about the species, too.
My hope is that scientists and others will be able to use this to best assess the number of invasive and spreading species in the area, how they get there, and how they survive there.
You should know that I DON'T know a lot (if anything) about the plants you may see or how they can help with science. This is also not an official product.
Thank you. menos ↑