Solanum prinophyllum, known as the forest nightshade or Grin Whiskers,[1] is a accepted species of small plant native to the east coast of East Victoria to Southeast Queensland, Australia.

[2] S. prinophyllum is a short lived herb, annual or perennial.

Forest nightshade grows up to 50 cm high.

Five petalled flowers occur at any time of the year and are blue or lilac in colour.

The fruit is a berry, which stays green or turns purple.