What is the meaning of Black-eyed_susan?

The flowering annual plant Rudbeckia hirta.

Various other flowering plants:

1. Certain other members of the genus Rudbeckia.
2. Hibiscus trionum in the family Malvaceae.
3. Any black-eyed Susan vine of species Thunbergia alata, in the family Acanthaceae.
4. Any member of certain species of the Australian plant genus Tetratheca, particularly Tetratheca hirsuta, members of the family Elaeocarpaceae

Certain other members of the genus Rudbeckia.

Hibiscus trionum in the family Malvaceae.

Any black-eyed Susan vine of species Thunbergia alata, in the family Acanthaceae.

Any member of certain species of the Australian plant genus Tetratheca, particularly Tetratheca hirsuta, members of the family Elaeocarpaceae

A kind of boiled pudding with currants.

Source: wiktionary.org