walnut, Juglans regia 核桃
water hyacinth, Eichornia crassipes 凤眼蓝
watercress, Rorripa nasturtium-aquaticum 西洋菜
water-pepper, Persicaria hydropiper 水蓼
weld, Reseda luteola 黄木犀草
white horehound, Marrubium vulgare 欧夏至草
wild carrot, Daucus carota 野胡萝卜
wild leek, Allium ampeloprasum 巨葱
wild oats, Avena fatua 野燕麦
willow, goat, Salix caprea 黄花柳