This native annual herb is endemic to California and found in valley grassland communities.

The range of D. bella is scattered from locations in Riverside County to areas in the Great Central Valley.

The corolla is blue with the lower lip having a central white field which then has two yellow spots (can be joined) in its middle.

The fruits of D. bella are between 16 and 18 mm with tough lateral walls that are tardily dehiscent despite no noticeable translucent lines.

Some areas in northern Sutter County have D. bella with a minute corolla horn similar to D. ornatissima.