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Arctium minus, commonly known as lesser burdock, [2] little burdock, louse-bur, common burdock, [3] button-bur, cuckoo-button, [3] or wild rhubarb, [4] is a biennial plant. This plant is native to Europe , [ 5 ] but has become introduced elsewhere such as Australia , North and South America , and other places.
Thalictrum flavum, known by the common names common meadow-rue, [2] [3] poor man's rhubarb, [4] and yellow meadow-rue, [5] is a flowering plant species in the family Ranunculaceae. It is a native to Caucasus and Russia ( Siberia ).
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.
The giant rhubarb, or Campos des Loges (Gunnera manicata), native to the Serra do Mar mountains of southeastern Brazil, is perhaps the largest species, with reniform or sub-reniform leaves typically 1.5 to 2.0 meters (4 ft 11 in to 6 ft 7 in) long, not including the thick, succulent petiole which may be up to 2.5 meters (8 feet 2 inches) in length.
Dense clusters of small, orange-red, flowers are held above the leaves on long slim peduncles. The clusters carry both male and female flowers and flowering continues for most of the year. [4] [5] [8] Fruit are green capsules at first, becoming blackish-brown at maturity when they burst and scatter the seeds up to 4 metres (13 feet) away. [5] [6]
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The genus includes the vegetable [3] rhubarb. The species have large somewhat triangular shaped leaves with long, fleshy petioles. The flowers are small, greenish-white to rose-red, and grouped in large compound leafy inflorescences. Many rhubarb cultivars have been domesticated as medicinal plants and for human consumption.
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.