San Diego County, California, US
The leaves seem smaller than the sample pictures I see.
A prickly weed who's name I don't even know.
Jumping Cholla or ?
A tiny flower on a ground spreading plant.
Another garden escapee...
Those look taller than the other specimen I observed in the same general area.
Again similar to Isocoma or... ?
Isocoma or ?
Very elongated and not very spiny.
Fairly short spines
If I am not mistaken, this would be an edible plant that I have seen sold in Mexican markets.
The last picture is of a seed which resembles a large tick.
Another garden escapee. The last picture is of the parent plant.
Fireweed I believe but I do not know the scientific name. I will update if I find out.