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Rocky Mountain Dandelion is a stemless, herbaceous perennial with erect to ascending, glabrous or sparsely hairy flower stalks that are up to 3 dm tall when mature. The basally-disposed, tongue-shaped leaves are 6-20 cm long, are glabrous, and have wavy margins and broadly winged petioles. The sap is milky. Solitary, terminal flower heads are borne on 1 to many leafless stalks. Each head has 2 s...