New Moon Nurseries

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A tall, rough plant, which occurs in limestone prairies and glades. From a basal clump of huge oval to heart-shaped, dark green leaves 1 to 2' long rise smooth, almost leafless stems branching at the top  with sunflower-like flowers  up to 3" across with yellow rays and yellow center disks bloom in loose clusters on the upper parts of the plant in mid to late summer. Many of the silphiums are commonly called rosinweed because of resounous sap inside the stems.