Hi Auntie, well I was taught to keep iambic pentameter to ten syllable lines, but I accept that the rule may not be universal. I did check with a few classic examples from Shakespeare (and others) but the examples I chose were all deccasyllabic. It certainly makes writing blank verse easier if you don't have to work in a straightjacket :D
Re. syntactical wrenching: well ok, but it's not common usage and does sound a little archaic. Strangely, it would have appeared less so if the sentence had continued beyond stand. e.g. "defies its peeling bark to stand unaided" otherwise contemporary useage would be to say, "...still stood, despite its peeling bark." but it's a minor quibble.
Best, H

