Thai: โกฏจุฬาลำพา (kot chulaalamphuaua)

Anyone seen this in Thailand?

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Yes. It's Artemisia Annua. You can buy the dry herb from Chinese pharmacies. Ask for 青蒿; qīnghāo ('ching how')

you can grow it. we have it all over the place here, stays green all year long; doesnt need much water.. you shouldt drink no more then two or three cups of sheba tea a day; a very popular herb here in israel used fro a variety of aches pains stomach ailments and also just for putting in tea (most north african/middle eastern ethnic groups are used to putting it in their tea)...nto to be used if pregnant.

it grows well in large buckets or barrels, not in small planters. it poisons the ground around it so that other plants will not grow near it.