(1834â1908), Dutch ophthalmologist. Snellen was director of an eye clinic at Utrecht. In 1862 he introduced a test for measuring the acuteness of vision which consisted of printed letters or words in type of various sizes.
Brief Summary. Papaver somniferum, opium poppy, is an annual herbaceous plant in the Papaveraceae (poppy family) that originated in southeastern Europe and western Asia, and are now widely cultivated in Europe, Asia, China, and North Africa for their seeds, which are used in baking, as a condiment, and for their edible oil.
Poppies are legal to grow in the United States, except for papaver somniferum. Among the many varieties of poppies, only opium poppy (Papaver somniferum) is illegal to grow in the United States.This native of Europe prefers the Mediterranean climates found in U.S. Department of Agriculture plant hardiness zones 8 to 10.t is illegal to grow Papaver somniferum in the United States because the unripe seed pods contain the milky substance that is scraped out and dried to become opium, so possession of the plant can be looked upon as possession of the drug.