This trail extends over Vernonia to Scappoose. Locations included Portland, Tualatin, and Beaverton, Sherwood, Vernonia, and Tigard. Vernonia lettermannii, the narrowleaf ironweed, is a plant species known only from Arkansas and Oklahoma. Vernonia djalonensis is a critically endangered species of plants in the family Asteraceae. "Vernonia" is a large, broadly distributed genus of flowering plants in the aster family, Asteraceae. "Vernonia texana" is an erect herbaceous perennial. Vernolepin is a sesquiterpene lactone isolated from the dried fruit of "Vernonia amygdalina". Common names include curtain creeper, vernonia creeper and parda bel. Pihl is based in Vernonia, Oregon. He currently runs a basketball camp in Vernonia, Oregon. The larvae feed on various low-growing plants, including dandelion, "Vernonia", and thistles. Vernonia is a city in Columbia County, Oregon, United States. The larvae feed on "Vernonia noveboracensis". One of over 1,000 species in genus "Vernonia", "V. galamensis" is native to East Africa. Vernonia High School is a public high school located in Vernonia, Oregon, United States.