Introduction: Long time ago, when I had no idea Velcro tape was called マジックテープ in Japanese I tried to suggest using it to my Japanese colleague. He had no idea about the word "Velcro", so I tried an example of bur, but I found Japanese people think of food when they hear ゴボウ (burdock) rather than its seeds.
Now I have found these stuck to my jeans:
(in reality they were greener, about 5 mm in size).
Question: What is the plant (or seeds) called in Japanese and is its feature of sticking to animals/human known well enough to use it as an explanation of the way Velcro tape works?