I had been looking for a replacement source for my coffee/caffeine fix.
Remember this mnemonic warning:
Holly Leaves are Lovely, but Berries are Brutal.The
Berries ARE NOT to be used, they cause sever nausea and vomiting.
The
leaves of the native American Holly plant contain caffeine and make a good tea or coffee substitute.
Source is here:
http://prepperherboftheweek.blogspot.com/2015/02/uses-for-holly-bush.htmlLeaves may be used green or toasted, but should be thoroughly dried first.