I think you're on to something OClair:
NORTHERN BREWER [LEAF] [PELLET]
7-11% All Purpose
A true dual-purpose hop containing moderate amounts of alpha acids combined with an acceptable aroma profile. Neutral, clean aroma, woody with evergreen and mint overtones and slightly higher-than-average bittering value.
Used For: Good for bittering with strong flavors and very fragrant. Steam beers, English-style Ales, ESB, Bitter, Porter, and German lagers.
Substitutes: Galena, Perle.
I'll let you know if the tea proves it was the northern hops.