Lathyrus tuberosus aka Earth Chestnut

Lathyrus tuberosus, also known as the tuberous pea, tuberous vetchling, earthnut pea, aardaker, or tine-tare, is a small, climbing perennial plant. It is native to moist temperate parts of Europe and Western Asia and can grow up to 1.2m tall. The plant has pinnate leaves with two leaflets and a branched twining tendril at the apex of the petiole. Its flowers are hermaphroditic and are pollinated by bees. The species is hardy to zone 6, and it prefers moist soil and can grow in semi-shade or no shade. It has a symbiotic relationship with certain soil bacteria, which form nodules on the roots and fix atmospheric nitrogen. While an easily grown plant, it can be slightly invasive, with new stems emerging at some distance from the parent plant. Additionally, slugs are known to be inordinately fond of this plant and can destroy it given the chance. It is noted for attracting wildlife and is suitable for light (sandy), medium (loamy), and heavy (clay) soils with a pH range of acid, neutral, and basic (alkaline). The tuberous pea has occasionally been cultivated for its edible root, though it should be noted that this plant might be poisonous. It is also a super rare houseplant that requires regular watering and direct light, preferably less than 1 foot from a window. The plant likes soil that is well-draining and may benefit from a gentle, organic fertilizer throughout the peak growing season. To remove sweet pea weeds, which can be mistaken for tuberous peas, the most effective way is with chemical herbicides like glyphosate. Glyphosate has a 95% or higher kill rate for wild sweet peas and should be diluted at a rate of 3 ounces in each 1 gallon of water. When applying the herbicide, take care to only spray on the wild sweet peas and avoid desirable plants as glyphosate can kill those as well. Always read and follow label directions, and wear protective clothing and eye protection when using chemical herbicides. Wash your hands with soap and water immediately after use.