Sonchus asper
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Sonchus asper, the prickly sow-thistle,[1] rough milk thistle,[2] spiny sowthistle,[3] sharp-fringed sow thistle, or spiny-leaved sow thistle, is a widespread flowering plant in the tribe Cichorieae within the family Asteraceae.
Description
Sonchus asper is an annual or biennial herb sometimes reaching a height of Script error: No such module "convert". with spiny leaves and yellow flowers resembling those of the dandelion. The leaves are bluish-green, simple, lanceolate, with wavy and sometimes lobed margins, covered in spines on both the margins and beneath. The base of the leaf surrounds the stem. The leaves and stems emit a milky sap when cut. One plant will produce several flat-topped arrays of flower heads, each head containing numerous yellow ray flowers but no disc flowers.[4][5]
Distribution
Sonchus asper is native to Europe, North Africa, and western Asia. It has also become naturalized on other continents and is regarded as a noxious, invasive weed in many places. Its edible leaves make a palatable and nutritious leaf vegetable.[6][7][8][9][10]
It is found in cultivated soil, pastures, roadsides, edges of yards, vacant lots, construction sites, waste areas and in grasslands.[11]
References
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- ↑ Template:BSBI 2007
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- ↑ Flora of North America, Sonchus asper (Linnaeus) Hill, 1769. Spiny-leaf sow-thistle, laiteron rude
- ↑ Flora of China, Sonchus asper (Linnaeus) Hill, 1769. 花叶滇苦菜 hua ye dian ku cai
- ↑ Altervista Flora Italiana, Sonchus asper (L.) Hill includes photos and European distribution map
- ↑ De la Barra, N. 1997. Reconstrucción y Evolución del Paisaje Vegetal Autóctono de la Zona Urbana y Peri-urbana de la Ciudad de Cochabamba i–v, 1–174. Tesis, Universidad Mayor San Simón, Cochabamba
- ↑ Marticorena, C. & M. Quezada. 1985. Catálogo de la Flora Vascular de Chile. Gayana, Botany 42: 1–157
- ↑ Humbert, H. 1923. Les Composées de Madagascar. Mémoires de la Société Linnéenne de Normandie 25: 1–335.
- ↑ Atlas of Living Australia
- ↑ Sonchus oleraceus L. by iewf.org
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