Goosegrass fruit. Coloured scanning electron micrograph (SEM) of the hooked fruit of a goosegrass plant (Galium aparine). The hooks become lodged in the fur of passing animals, such as the dog in the background, ensuring that the plant's seeds, which are held in the fruit, are well dispersed before germination. Goosegrass is an annual weed that is native to Eurasia. Magnification: x38 at 6x7cm size.