Can anyone say what this plant is. It grew on waste dry ground by a wall near houses on a track near Henley on Thames.
Presumably it is a garden escape. It was erect, without leaves, about 20cm tall with reddish stem diam 2mm at base, 1 mm at top. Flowers pale yellow, regular, petals in 4s or 5s, free. It had 4 or 5 sepals hairy 3mm long 1mm wide, hairy. Single stigma. Many stamens. Flowering March17. See attached image
I wondered whether it might be a member of the Berberidaceae?
The photo isn't great.
When you say many stamens - how many? More than 6?
If the flowers had been just in 4s I would have thought Apiaceae - there are lots of weedy crucifers that might lose their leaves at the ends of a short hard life.
sorry not to be of more help