1, pollen is a flowering plant male organ, is the stamen in the reproductive cells, the appearance of powder, the individual called "pollen grain". It contains a variety of nutrients needed by the human body, some people believe that its nutritional value than milk, eggs 4 to 6 times higher. China is the earliest civilization to consume pollen. The well known pine flower doughnut is spread all over the country with various products. The Divine Husbandman's Classic of the Materia Medica classified Pu Huang as a top quality, known as a health agent, said: long service light body, beneficial to the gas, prolong life.

2, most of the pollen is dispersed at maturity, becoming a single grain pollen. But there are more than two pollen bonded together, known as composite pollen grains. Many pollen bonded together, at least two or more in a chamber, known as pollen nuggets. All pollen grains bonded together in one or more chambers are called pollen nuggets. Pollen nuggets and pollen clumps are found mainly in the orchid and loropetalum families.