Show ABOUT FLOWERS the coloring principle of the madder affects even the bones of animals that devour the plant the ivy lettuce opens its leaves and flowers at eight in the morning and generally closes again by four A great many flowers close at night the marigold shuts up at sundown and remains closed until morning all plants are provided with flowers though sometimes these are so small and so hidden as to escape notice the pollen of flowers is in grains so small that many kinds are no more than a thousandth of a millimeter in diameter the thamine car flower has for thousands of years been used to dye fabrics of a yellow color the mummy claths cloths found in egyptian coffins are dyed yellow with this flower |