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发表于 2011-9-15 21:21:30
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引用第8楼游客于2011-09-15 11:58发表的 :
刚刚查到。空心菜,英文又名Water Spanish,在2005年被USDA列为有害杂草。但是,由于这种杂草可做为高价值蔬菜,德克萨斯州允许个人种植。德州允许种植空心菜的其中一个原因是在该州种植了15年,没有看到这种杂草蔓延,这可能也就是各州睁一只眼闭一只眼允许超市销售的原因。也可能规定已改,我们不知道而已。
参考:http://en.wikipedia.org/wiki/Morning_glory
Ipomoea aquatica, known as water spinach, water morning-glory, water convolvulus, Ong-Choy, Kang-kung, or swamp cabbage, is popularly used as a green vegetable especially in East and Southeast Asian cuisines. In the USA it is a Federal Noxious Weed, and technically it's illegal to grow, import, possess, or sell. See: USDA weed factsheet. As of 2005, the state of Texas has acknowledged that water spinach is a highly prized vegetable in many cultures and has allowed water spinach to be grown for personal consumption. This is in part because water spinach is known to have been grown in Texas for more than fifteen years and has not yet escaped cultivation.[2] The fact that it goes by so many names means that it easily slips through import inspections, and it is often available in Asian or specialty produce markets
我栽在盆里,没种在地里。钻得着这牛角尖吗? |
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