Habitat and Distribution Missouri bladderpod occurs primarily in limestone glades and rocky open areas. Many populations have persisted in grazed pastures, rocky open woods and limestone outcrops along roadsides. Nearly all of the remaining sites are on privately owned land. Cause of Historic Decline Historically, populations of bladderpod were restricted to limestone glades and rocky, open areas. Encroachment of woody vegetation and introduced grasses such as tall fescue into these habitats, along with large fluctuations in bladderpod populations were the reasons for the concern and listing of this species.
Recent surveys indicate that some local populations of bladderpod are doing well.
Bladderpod is an annual plant and it competes poorly with cedar trees, cheat grass, and fescue. Therefore, good glade management is essential to the survival of the bladderpod, and landowners can take an active role in preserving and increasing local populations. Current Threats to Missouri Bladderpod Highway construction and urbanization Missouri bladderpod habitat has been lost through urbanization and road development. The absence of fires and other disturbances allows woody plants, especially cedars to invade prairies and glades. As cedars take over an area, they alter the habitat and make it unsuitable for the bladderpod.