East Yorkshire, United Kingdom

2 hitch-hikers to id please.
I suspect both are 'problems. they were in a pot with a penstemon my brother gave me. He doesn't have them in his garden.
The first is quite a bluish green and soft to the touch. about 6-9" tall and quickly filling the 0.5 litre pot.
the second is a small rush like plant clearly producing stolons . it is similar in size to pearlwort 2" tall.

• 2 Sep, 2018