Howellia is typically found at the edges of low-elevation vernal pools, generally in shaded areas.
Habitat loss due to agricultural and urban development and changes in wetland hydrology pose significant threats to this species. Displacement by invasive plants (e.g., reed canary grass, purple loosestrife) and aquatic vegetation succession can also adversely affect howellia.
Develop propagation and transplanting protocols. Conduct long-term demographic studies. Investigate seed viability and distribution mechanisms. Conduct seed bank studies and develop methods for storing viable seeds.
Maintain or restore seasonal wetland habitat. Control invasive plants at priority sites. Conduct surveys of potential habitat to locate additional populations. The draft recovery plan identifies additional conservation actions.