Solanum nigrum ( Nightshade )

Solanum nigrum or Nightshade

Since I found this grass in nearby lot, I have been wondering what it is.
It has small flowers in autumn, they have small fruits soon.
According to information I got, this seems to be solanum nigrum (nightshade).
Solanum nigrum ( Nightshade ) has some different kinds.
This nightshade expands stalks sideways without standing upright. Flowers have small pure-white petals, and the fruits are green but turn their color into purple-black gradually.
It is said that they are poisonous.

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