Tanacetum balsamita (Costmary, Bible Leaf)
Costmary has been a staple in my garden for many years. I love this perennial herb for lots of reasons: its addictive, fresh minty fragrance; its large, bright green leaves bespeak springtime; its pretty little yellow button flowers in summer; and, most of all, because I just like the sound of the name, "Costmary." The leaves can be used for tea and, if dried, for adding to drawers and cupboards. I once pressed a large leaf in a book, and it made the nicest bookmark I have ever had. I didn't know then that a common name for Costmary is "Bible Leaf" because of its use as fragrant bookmarks. Costmary may need to be given a little sprucing up from time to time to keep it tidy, but other than that, it's a joy to have. Sun. Zones 6-9. Quarts. (Photo attribution: The original uploader was Spedona at French Wikipedia [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons).