From Wikipedia:
The four basic types of true tea are (in order from most to least processed): black tea, oolong tea, green tea, and white tea. The term "herbal tea" usually refers to infusions of fruit or of herbs (such as rosehip, chamomile, or jiaogulan) that contain no Camellia sinensis . (Alternative terms for herbal tea that avoid the word "tea" are tisane and herbal infusion.)
This statement shows that the green tea is an
actual tea, which is against the word of wisdom.
Also, from the following link:
http://lds.about.com/od/wordofwisdomhealth/f/herbal_tea.htmThe official lds church doctrine states that drinking tea is against the Word of Wisdom.
Under the Gospel Topic of Word of Wisdom at LDS.org it states:
"The best course is to completely avoid the substances that the Lord prohibits in the Word of Wisdom."
But to clarifty, herbal tea is not against the word of wisdom, although we have been cautioned: "Some people enjoy herbal teas, but even these should not replace more nutritious drinks in the diet" (Lora Beth Larson, "The Do's in the Word of Wisdom," Ensign, Apr 1977, 46.)