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Blue Toadflax is a slender annual with erect, unbranched stems that are 1-5 dm tall. There is a rosette of prostrate stems at the base, the leaves of which are narrowly oblong, 5-10 mm long, and opposite or in whorls of 3. Stem leaves are narrower, and the lower are opposite or in whorls of 3, becoming alternate above. Foliage is glabrous, often with a thin, bluish, waxy coating. Short-stalked f...