Okamoto:Sonchus

Family/Genus Description

For comprehensive information, visit Sonchus page. (BY Shigeharu Okamoto)

• Sonchus arvensis

キク科 タイワンハチジョウナ perennial sow-thistle; field sow thistle; corn sowthistle; corn sow thistle; sow thistle 多年草。切ると白色の乳液が出る。葉は互生し灰緑色。頭状花は房になってつき、径40～50mmで黄色。

• Sonchus asper

キク科 オニノゲシ spiny milk thistle; sowthistle; spiny leaved sow thistle; spiny sow thistle; prickly sow thistle

• Sonchus oleraceus

キク科 ハルノノゲシ;ノゲシ;ケシアザミ annual sow thistle; tufty thistle; smooth sow thistle; hog grass; common sow thistle; sowthistle; milky thistle; sow thistle; milk thistle