Several Trees are refered to as Our National Christmas Tree. But, since most of them are not in National Parks, I have to assume you are referring to the General Grant Tree. Nation's Christmas Tree - Sanger, California:
In 1926 Congress formally designated California's "General Grant" Sequoia as the "Nation's Christmas Tree." In 1949, nearby Sanger, California was designated as the "Nation's Christmas Tree City." A third honor was awarded on March 29, 1956, when President Dwight D. Eisenhower proclaimed the "Nation's Christmas Tree" as a national shrine to the war dead. During a Christmas ceremony each year, park rangers place a large wreath at the base of the tree.
National Lampoon's Christmas Vacation (1989).
It is the giant Sequoia in Sequoia National Park in California.
The biggest tree, by volume, is the General Sherman, a Giant Sequioa, Sequioadendron giganteum, in the Sequoia National Park in California.By height it is the 379ft Coast Redwood, Sequioa sempervirens, in the Redwood National Park in California
The official tree of Manitoba is the White Spruce.Popular and easily-recognized, the White Spruce, Picea glauca, is able to survive in virtually all climatic and environmental regions of Manitoba. Most well-known as a traditional 'Christmas' tree, the white spruce is often cultivated for that purpose.
A yule tree is an evergreen tree used as a decoration at Christmas time, also known as a Christmas tree.
California
Douglas fir
no
I believe that the pine tree is the national Christmas tree.
Switzerland does not have an official national tree.
The National Christmas Tree is selected from a state somewhere in the US and taken to Washington D.C., where it is set up on the Capital Mall.
National Christmas Tree - United States - was created in 1923.
The White House has an official indoor Christmas tree called White House Christmas Tree or Blue Room Christmas Tree. The first official indoor Christmas tree was installed on 19th century.
Sequoia National Park
Joshua Tree National Park was created on 1994-10-31.
The tree is the Redwood. The national park is Redwood National and State Parks, California, USA.
1994