Friday, July 15, 2011

stigma and style of carpel

The stigma of a plant is the extension of the female reproductive organs of a plant. The stigma is actually what comes into contact with the pollen. In the photo you can see the stigma sticking out of the flower.

Gymnosperm

Gymnosperms are plants that, unlike angiosperms, deposit their seeds bare into the ground. This pine tree is a good example because it drops its seeds with its pine cones, so their is no extra protection for them.

Phloem

In a vascualr plant, like this tree, phloem is the living tissuem that transports nutrients all around the plant. Unfortunatley you cannot see the phoelm due to the fact that it is the innermost layer of the tree.

Stem-woody

Plants with woody stems are very simply plants who's stems are wood. These plants, like this bush from my back yard, are typically larger than plants with herbacious stems. They can grow larger due to the fact that woody stems can support more weight.

Flower Ovary

Located back at the narrower part of the flower the flower ovary is the begining of the female portion of the floral reproductive system. It functions in much the same way a human ovary and is essential to the floral reproductive process. 

Anther and Filament of Stamen

The antehr and filament of the stamen are the male reporductive parts of a flower, that are responsible for producing pollen. The stamens in this hosta are primarily contained within the central part of the flower. the pollinators, such as bees are attracted to them by the colors of the flower and then they take the pollen with them.

Pollinator

Pollinators are animals that carry pollen from one plant to another in order to allow those plants to reproduce. The pollen from the anther of one plant to the stigma of another. Such as this bee that has landed on a hosta. It most likely is depositing pollen it carried with it, as well as picking up new pollen on its body. While many insects are pollinators, bees are the most specialized for the job.