September Twentieth
Nature employs many ingenious devices for distributing the seed of her plants. The downy seeds of the Canadian thistle, dandelion, prickly lettuce, dogbane, and milkweed are cast over the land by the winds. The common tare, the jewel-weed, and the wood sorrel have devices for throwing their seeds. Seeds of many species of plants are contained in burrs or "stickers" that adhere to the coats of animals and are carried miles before they are finally planted.