去前院种东西，先除杂草，发现去年除的杂草又长出来了。拔了一棵，正要扔，突然觉得这个有点像前些日子和家人念叨的艾草（老父亲风湿关节炎；有朋友说艾灸有用；老父亲试后认同）。问了一下朋友，都说像。有人建议用识图软件识别一下。结果给出三个答案。挨个看了一下，结论是：对的。我院子里那生命旺盛屡除不尽的正是艾草。简直立刻有捡到宝的感觉。
Artemisia argyi, herbaceous perennial about one metre tall, with short branches and a creeping rhizome （爬行的根茎；根部应该很发达，应该是一揪，一串根就起来了；今天还没有来得及去拔出来看）. Known as silvery wormwood or Chinese mugwort. 这个是中国的艾草， 或称艾蒿。It is native to China, Korea, Mongolia, Japan, and the Russian Far East. 可以用来做青团. 注意看图中标记的叶子是从叶茎同一个位置长出来的。 最顶端的叶片是完美对称的。非顶端的叶片不是。 另外注意看叶片的锯齿形状。背面有几乎看不见的白毛，所以比正面看起来有点偏白。https://en.wikipedia.org/wiki/Artemisia_argyi
Artemisia absinthium, perennial plant with fibrous roots. The stems are straight, growing to 0.8–1.2 metres. Called wormwood or agsinthe wormwood, used for 苦艾酒。native to Eurasia and Northern Africa and widely naturalized in Canada and the northern United States https://en.wikipedia.org/wiki/Artemisia_absinthium
Artemisia vulgaris，common mugwort， a tall herbaceous perennial plant growing 1–2 m。 is native to temperate Europe, Asia, northern Africa and Alaska and is naturalized in North America
have been used medicinally and as culinary herbs. used as one of the flavoring and bittering agents of gruit ales (浓啤酒）, a type of non-hopped （not containing Humulus lupulus), fermented grain beverage. https://en.wikipedia.org/wiki/Artemisia_vulgaris
顺便说说另外俩个在美国没有见到的这个大家族成员：
Artemisia carvifolia，中文名叫青蒿，背面绿色，无毛，但是不含“青蒿素”。https://baike.baidu.com/item/%E9%9D%92%E8%92%BF/603320
Artemisia annua，中文名叫黄花蒿，花有点黄绿色。无毛。叶茎有点棕色。含“青蒿素“。 屠呦呦就是因为提炼到这个东东，并证明对治疗疟疾有效而获得的诺奬。
https://baike.baidu.com/item/%E9%BB%84%E8%8A%B1%E8%92%BF/8259189
