Teena Agrawal
Gymnosperms are the plants of the great evolutionary and the economic values. They have the long fossil history. The Mesozoic era has been termed as the age of the cycads. However in the recent era coniferales are the only representative of the wholes of the group. Cycadales shows the relict lines of the evolution. In conifer also Pseudotsuga Pis the plant of the great interest. In America, the northern belt of the plants is the dominant part of the vegetation. In India Pseudotsuga can be found in the Himalayan belt. Pseudotsuga is the main theme of the paper. In this articles we have try to involve the main features of the Pseudotsuga. Conservation of the plant lines should be the utmost work of the many governments in India as well as the other part of the globe. The forest of the Pseudotsuga sustains the long belt of the forest ecosystem. Degradation of the keystone species leads to the disappearances of the whole ecosystem.
