Northeastern Asian Flora
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Sonchus asper (L.) Hill   (redirected from: Sonchus spinosus Lam.)
Family: Asteraceae
[Sonchus fallax Wallr., moreSonchus glaber Thunb., Sonchus oleraceus var. asper L., Sonchus spinosus Lam., Sonchus tibesticus Qu?el, Sonchus viridis Zenari]
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  • Japan Flora
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Japan Flora: Nearly glabrous annual or biennial herb; stems branched, 50-100 cm. long, hollow; leaves ovate-oblong, large, often incised or pinnately parted, rather closely spine­toothed; upper leaves dilated at base, auriculate; heads about 2 cm. across, umbelliform, yellow; involucres 1.2-1.3 cm. long; achenes narrowly obovate, flattened, smooth or nearly so, with 3 ribs or nerves on each side; pappus 7-8 mm. long. May-Oct.

European weed, naturalized in our area.

 

Sonchus asper
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.
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