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Schoenoplectus americanus (syn. Scirpus americanus) is an American species of flowering plant in the sedge family known by the common names chairmaker's bulrush and Olney's three-square bulrush. Description
Schoenoplectus pungens is a species of flowering plant in the sedge family known as common threesquare, [2] common three-square bulrush [3] and sharp club-rush. [4] It is a herbaceous emergent plant that is widespread across much of North and South America as well as Europe , New Zealand and Australia .
Schoenoplectus acutus (syn. Scirpus acutus, Schoenoplectus lacustris, Scirpus lacustris subsp. acutus), called tule / ˈ t uː l iː /, common tule, hardstem tule, tule rush, hardstem bulrush, or viscid bulrush, is a giant species of sedge in the plant family Cyperaceae, native to freshwater marshes all over North America.
The following list provides the 704 species of common trees and shrubs of flora of Sri Lanka under 95 families. The list is according to A Field Guide to the Common Trees and Shrubs of Sri Lanka, by Mark Ashton, Savitri Gunatilleke, Neela de Zoysa, M.D. Dassanayake, Nimal Gunatilleke and Siril Wijesundera. [1]
Schoenoplectus (club-rush [Old World species], bulrush or tule [New World species]) is a genus of plants in the sedge family with a cosmopolitan distribution. [ 1 ] [ 2 ] [ 3 ] Note that the name bulrush is also applied to species in the unrelated genus Typha as well as to other sedges.
Bolboschoenus robustus is a species of flowering plant in the sedge family. It is known by many common names: saltmarsh bulrush, alkali bulrush, sturdy bulrush, seacoast bulrush, stout bulrush, three-cornered sedge or leafy three-cornered sedge, and seaside club-rush. [6]
Sri Lanka needs about 3–4 million metric tonnes annually. Today 30–40% of rice is imported from India. Because Sri Lankan farmers left farming. It cultivates mostly the North Central and East provinces of Sri Lanka. The seasons are called the Maha season and the Yala season. Maha Season starts in September and ends in March.
The Indian and Sri Lankan populations of C. fenestratum are probably the most disturbed and severely affected. Over a 75 year period (three generations for this species), the plant population has been reduced by 80% due to indiscriminate gathering by local people. Hardly any mature plants are left in the wild. [1]