A close-up of leaf nodes of the Himalayan balsam, Impatiens glandulifera. Originating along rivers in the Himalayas, this balsam was was brought to Great Britain and the United States in the 19th century, according to the book. There, it spread rapidly as a garden plant.
For the canaries
Fruiting canary grass, Phalaris canariensis. Its name may have been inspired by the plant's native habitat, as it originally grew in the Canary Islands in the western Mediterranean Sea, according to the book. Or perhaps "canary grass" is a nod to the fact that its seeds are fed to canaries.