Plantago seeds are traditionally used for urinary tract infections, prostatitis, conjunctivitis, nephrotic edema, ureteral stones, and difficulty in urination. Where grown: Throughout China. Source: Dried, ripe seeds of plantago asiatica L. Ingredients: Plantasan, l-rhamnose, d-galactose Function: Promotes urination, treats stranguria, clears lungs, improves vision, dispels dampness in bladder and phlegm. Major clinic usage: For gonorrhea, blood in the urine and swollen, painful red eyes.