My neighbor has a volunteer plant come up in her garden that she lets grow each year. I also spotted a few plants down by our guardrail and took a few pictures. In her garden it grows at least 10 feet tall and has spread to a colony of about 10 feet in diameter. The plant has very soft needle like leaves and the main branch is white hairy. To my knowledge, it hasn't flowered, but I'm not down there all the time. It is a really cool plant because the foliage is so soft, but I'd like to know what it is! Not sure if it is an annual or perennial, but I'm thinking perennial that comes back from roots each year. Any thoughts?