Lathyrus grandiflorus -The Two-Flowered Everlasting Pea
The everlasting pea is a species of the genus Lathyrus (pea plants) that’s indigenous to Great Britain. It doesn’t set down seed well, and is not considered healthy to eat, when it does (much like the sweet pea).
However, despite its difficulty of cultivation in a home garden, everlasting peas are still popular ornamentals, and the seedlings are available at most greenhouses and nurseries throughout Europe. The tendrils that you see at the end of each stem will climb trellises and other plants easily, so it’s inadvisable to plant everlasting peas near any other herbaceous growths.
Flora Conspicua; A Selection of the Most Ornamental Flowering, Hardy, Exotic and Indigenous Trees, Shrubs, and Herbaceous Plants, For Embellishing Flower-Gardens and Pleasure-Grounds. Richard Morris, 1826.