In this article we will discuss about the phylogenetic organs of flower. Most Taxonomists agree that angiosperms form a natural group. They are monophyletic that is, their origin is from one ancestor only. But the ancestor is to be identified definitely. The ancestral organs from where the extant floral parts evolved are not known. Wilson (1982) regards that angiosperms evolved [...]
The below mentioned article provides biology notes on Flowers or Floral Organs. Flower is a specialized condensed shoot of an angiospermic plant in which the shoot apical meristem gets transformed into floral meristem for carrying out sexual reproduction through progressive specialisation of leaves into floral appendages. Like a branch, it may develop in the axil of small leaf-like structure called [...]
In this article we will discuss about the parts and functions of a flower. Parts of a Typical Flower: A typical flower consists four whorls of floral appendages, attached on the receptacle, i.e., calyx, corolla, androecium and gynoecium. Of these, the two lower whorls, i.e., calyx and corolla are sterile and considered as non-essential/accessory/helping whorls and the two upper whorls, [...]