8. Lesser Celandine
You can use the leaves of this plant before it flowers to boost your Vitamin C intake.
However, you must cook or dry the Lesser Celandine leaves before you use them.
This will remove the risk of exposure to a toxic element that is stored within them but destroyed by heat. And again, only harvest the leaves before the flowering season.
Dried leaves are most commonly added to tea, where they offer analgesic properties.
Photo by Mrs. Gemstone