bladderpod

n.
  1. a North American wild lobelia (Lobelia inflata) having small blue flowers and inflated capsules formerly used as an antispasmodic.
  2. any of a number of annual or perennial herbs with inflated seed pods; some are placed in the genus Lesquerella.
  3. any of several plants of the genus Physaria having racemose yellow flowers and inflated pods.
  4. any of several hairy North American herbs having yellow racemose flowers and inflated pods.