canada thistle (cirsium arvense) and bumblebees

agrestal arvense bee bitter bombus bumblebee bumblebees canada carder cirsium collecting couch drawk fieldweed forb forbs grass harmful herb hogweed honey humblebee ill meadow natural nature pearls persistent pink plant pleasure scenery sonchus sowthistle spring string summer sun tare tares thistle undesirable vegetation watch weak weed weedage weedery wind worst