Stamen
Stamen
The stamen is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium.
Morphology and terminology[edit | edit source]
A stamen typically consists of a stalk called the filament and an anther which contains microsporangia. Most commonly anthers are two-lobed and are attached to the filament either at the base or in the middle area of the anther. The sterile tissue between the lobes is called the connective.
Function[edit | edit source]
A typical, entomophilous (insect-pollinated) stamen consists of a pollen-producing anther attached to a filament. The pollen is released when the anther's two lobes open up. This process is called dehiscence.
Types of stamen[edit | edit source]
Stamens can be categorized in a number of ways:
- By attachment to the perianth
- By number
- By length
- By anther attachment
- By anther dehiscence
- By pollen release
Evolution[edit | edit source]
The stamen is thought to have originated in the sporangia of the ancient, extinct group of plants known as the progymnosperms.
See also[edit | edit source]
References[edit | edit source]
External links[edit | edit source]
| Stamen Resources | |
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Contributors: Prab R. Tumpati, MD
