"Ummm, some of us are trying to eat here!"
There's a little cut flower garden tucked away on the north side of VanDusen Gardens run by volunteers. It's a little secret bee garden alive with all sorts of activities and I urge you to seek it out. Tansy is so unusual because they are clusters of composite flowers without expending the extra energy to grow petals. They make nice landing pads for a variety of insects.
Tansy (Tanacetum vulgare) is a noxious weed in Vancouver with a history as a dye plant (yellow), powerful medicinal plant (considered too toxic to be used today) and insect repellant. It was put in with corpses in coffins in New England and in linen closets to repel moths. It is commonly planted in gardens in Australia to keep away ants, so maybe scientists should take a closer look at the potential for putting all that tansy along BC highways to good use. The essential oils are high in thujone, also found in the herb garden in oregano, common sage, and wormwood.
(Tanacetum vulgare)is a noxious weed in Vancouver