Pineapple Weed

This is an interesting little plant. It's very common around where I live and can be boiled in water to make a very nice sweet-smelling drink, tasting similar to chamomile. Great for a quick hot drink while you're out, I find it almost everywhere.

Unmistakable yellow flowers and distinctive leaves

It has very distinctive leaves and flowers, making it very easy to identify. There are no petals on the flower heads, and the plant tends to grow in groups that can cover large areas. Mostly found by roadsides.  This lot in the picture cover half of my driveway.