in progress updating this page
I see a lot of brassicas self-seeding in the urban environment. I find identifying them challenging. My first step is always documenting the plants, some I can identify, some I can't - yet but I am determined to.
Black Mustard (Brassica nigra)
May 2019
Brown Mustard (Brassica juncea)
seen January 2020
fruits
Charlock (Sinapis arvensis)
May 2019
a couple weeks before the charlock was in bloom
close-up of the buds
wider view of the charlock
Eastern Rocket (Sisymbrium orientale)
May 2019
mid-May 2019
Flixweed (Descurainia sophia)
June 2019
Marsh Yellowcress (Rorippa palustris), seen by the side of the Sainsbury's in Camden Town
Shepherd's Purse (Capsella bursa-pastoris)
Thale Cress (Arabidopsis thaliana)
Rocket but not sure which specifically (wall rocket? perennial wall rocket?), self-seeded from another large patch nearby which is bare at the moment but maybe had been sprayed with weedkiller (prevalent throughout Camden).
Winter Cress (Barbarea)
mid-May 2019
a week later buds are more visible
close-up of the buds
not sure if this is the same as the one above, seen March 2019
Unknowns
I saw this in Castlehaven Park, August 2019.
This was in my back garden, possibly from birdseed, June 2019.
This is growing next door and I see it over the wall between our gardens but not close enough to examine as closely as I'd like. It comes back every spring and covers the garden. I must pick a sample next year. May 2019
