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Gunnera tinctoria, known as giant rhubarb, [2] Chilean rhubarb, or nalca, is a flowering plant species native to southern Chile and neighboring zones in Argentina. It is unrelated to rhubarb , as the two plants belong to different orders , but looks similar from a distance and has similar culinary uses.
Darmera peltata, the Indian rhubarb or umbrella plant, is a flowering plant, the only species within the genus Darmera in the family Saxifragaceae. [2] It is a slowly spreading rhizomatous perennial native to mountain streamsides in woodland in the western United States (western Oregon to northwestern California), growing to 2 m (6 ft 7 in) tall by 1 m (3 ft 3 in) wide.
The drug rheum is prepared from the rhizomes and roots of another species, R. officinale or medicinal rhubarb. This species is also native to Asia, as is the turkey rhubarb, R. palmatum. Another species, the Sikkim rhubarb, R. nobile, is limited to the Himalayas. The centre of diversity for this genus is found in Central Asia. [18]
Rheum nobile, the Sikkim rhubarb [1] or noble rhubarb (पदमचाल), is a giant herbaceous plant native to the Himalaya, from northeastern Afghanistan, east through northern Pakistan and India (in Sikkim), Nepal, Bhutan, and Tibet to Myanmar, occurring in the alpine zone at 4000–4800 m altitude.
Rheum rhabarbarum was first described by Carl Linnaeus in 1753. [3] Linnaeus also described R. undulatum, but this is now considered to be the same species. [1]The name rha barbarum, Latin for 'foreign rha', was first used in the writings of Celsus, who uses the word to describe a valued medicinal root imported from the east.
Rhubarb damaged by severe cold should not be eaten, as it may be high in oxalic acid, which migrates from the leaves and can cause illness. [17] The colour of rhubarb stalks can vary from the commonly associated crimson red, through speckled light pink, to simply light green. Rhubarb stalks are poetically described as "crimson stalks".
Forcing is the horticultural practice of bringing a cultivated plant into active growth outside of its natural growing season. Plants do not produce new growth or flowers (and hence fruit) during the winter, and many species only produce flowers or fruit for a very limited period.
The seeds of two species of Fagopyrum, known as buckwheat, are eaten in the form of groats or used to make flour. The petioles of rhubarb ( Rheum rhabarbarum and hybrids) are a food item. The leaves of the common sorrel ( Rumex acetosa ) are eaten in salads or as a leaf vegetable .