Is st. john's wort and st. john's plant .?

Question:the same thing? i'm very confused. i was looking for a place to buy mugwort. and found this site: http://www.botanical.com/botanical/mgmh/...

and it refers to it as st. john's plant.they're not the same thing are they??

Answers:
No, mugwort and St. John's wort are two entirely different plants. St. John's wort is a herb used to treat depression and mugwort, aka artemisia, is in the herb family but only used for fragrance. It is a soft silvery shrub that grows about 2ft high and mound to an impressive 10ft wide if not trimmed back.