Pollen as large as about 90–100 µm. In angiosperms, during flower development the anther is composed of a mass of cells that appear undifferentiated, except for a partially differentiated dermis. As the flower develops, four groups of sporogenous cells form within the anther. The fertile sporogenous cells are surrounded by layers of sterile cells that grow into the wall of the pollen sac. Some of the cells grow into nutritive cells that supply nutrition for the microspores that form by meiotic division from the sporogenous cells. In a process called microsporogenesis, four haploid microspores are produced from each diploid sporogenous cell
The Torment of a Flower children's songs. In 1934, Chou Tien-wang () was working in a record company Taiwan Columbia (古倫美亞唱片), once he went to a nightclub and heard a sad story about a girl worked there. Chou was touched, he decide to rewrite the lyrics of "Spring", wrote the story into Teng's music, that is "The Torment of a Flower". It's the first work of Teng and Chou with each other. Especially, there was usually three part lyrics in a Taiwanese Hokkien songs then, but there was four parts in The Torment of a Flower. The first part of the lyrics means: "Blossom in