Biggest and Tallest Tree in the World.

The largest tree in the world is a giant sequoia (Sequoiadendron giganteum) in California's Sequoia National Park. Called General Sherman, the tree is about 52,500 cubic feet (1,487 cubic meters) in volume.

General Sherman is also tall, standing 274.9 feet (83.8 meters) high, but that doesn't put it anywhere close to the record of tallest tree. 

The largest tree in the world is a giant sequoia (Sequoiadendron giganteum) 

The tallest trees in the world are redwoods (Sequoia sempervirens), which tower above the ground in California. These trees can easily reach heights of 300 feet (91 meters).

The tallest trees in the world are redwoods (Sequoia sempervirens)

Source:http://www.livescience.com/28729-tallest-tree-in-world.html