Possible Clues:

• Does it grow wild in desert?
• Weed with scrap above and below
• In grass, grow wild flower
• Weed garden's first bed raised in grass
• Yellow-flowered weed, also called dog standard
• Common weed partly spoilt row, gardener recalled
• Yellow flower, poisonous to cattle
• Plant of the daisy family, toxic to livestock
• Value mainly applied to tabloid's wild growth
• Widespread obnoxious weed