Tag Archives: invasive

SWEET ANNIE AND SWEET GRAPES

Annie Helps the World

    Sweet Annie (Artemisia annua): such an unassuming name. Likewise for the plant itself, with its ferny, but not distinctive, foliage, and flowers not worth a second look. You’d hardly peg this plant as a player in global health and global warming.    But look within the leaves and you find artemisin, a biologically active compound that has contributed to Sweet Annie’s figuring into Chinese herbal medicine for the past 2,000 years. Artemisin was isolated from the plant in the 1970s by Chinese scientist Tu Youyou, for which she  shared a Nobel Prize. Sweet Annie’s uses in Chinese medicine — qinghao in Chinese — run from treating asthma to skin diseases to stomach pain to rheumatism to  . . . but not all such claims have been experimentally verified (and Sweet Annie could have bad side effects).    The most widespread and thoroughly documented use of Sweet Annie …

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MORE PRUNING, AN INVASIVE?

Training Sessions

   Anyone appalled at the apparent brutality with which I approached my grape and kiwi vines a few weeks ago, pruning shears, saw, and lopper in hand, would have been further shocked today. But no harm done. (The kiwis are “hardy kiwis,” that is, Actinidia arguta and A. kolomikta; fuzzy kiwis are not cold-hardy here.)    Left to their own devices, grape or kiwi vines would, every year, grow larger and larger, eventually, if once coming upon something to climb, sending their fruits further and further out of reach. Or, if not out of reach, then increasingly tangled in a mass of stems. In the dank interior of that mass of stems, many a grape would have rotted rather than ripened.    Most importantly, though, grape or kiwi berries on untended vines don’t taste that good. Self-shading cuts down flavor-producing photosynthesis. And the plants’ energies must be spread among too …

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