Solanum johnsonianum is an erect rhizomatous perennial shrub which is endemic to Queensland, Australia.
This species occurs from North-West Theodore to North Biloela in Acacia harpophylla vegetation on cracking clay soil.
Flowering has been observed in March to August with fruiting observed in April to May.
Solanum dissectum is listed as "endangered" under the Queensland Nature Conservation Act 1992 and under the Australian Government Environment Protection and Biodiversity Conservation Act 1999.