It is generally referred to as Silver Needle tea--Best Green Tea

There is far less white tea grown harvested than green tea and black tea. This is because good white tea can only be harvested for about two weeks during March and April of each year. Harvesting white tea requires particular temperatures and other environmental conditions. It must be picked when the weather is dry and there has been no frost the night before.
For this reason, you won't find multiple pluckings of white tea the way you will with black and green tea. To ensure the best flavor, only the tea plucked during this particular time of the year when the buds are new can be used to make white tea. This is one of the reasons that white tea is so rare. Each garden will produce just one crop per year.
The same tea plants that produce the white tea could possibly be used to produce multiple pluckings later in the growing season that will be used to make black or green tea. However, in most cases this is not how white tea is grown. Most tea farmers use one particular variety of the camellia sinensis plant for their white tea, and others for green and black teas.
So, when it comes to choosing the best white tea, choosing from a particular plucking is not important, as it's all "first plucking". It's more important to know the best varieties of white tea, as this will be more important to ensuring that you find the flavor and delicacy you're searching for. These varieties are not brands; these varieties of white tea may be found in several different brands of white tea.
Bai Hao Yinzhen Tea - A Chinese white tea, this is considered the very finest grade of Best Green Tea available. It is generally referred to as Silver Needle tea. This tea can only be plucked for a little more than two weeks of during March and April. There must be no rain or dew on the ground when it is plucked and there can be no frost. Only unopened and undamaged buds are used to produce this white tea.