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Transcript
Friends of the Arboretum Native Plant Sale Silphium integrifolium – Rosinweed COMMON NAME: Rosinweed SCIENTIFIC NAME: Silphium integrifolium – the name comes from a Greek word meaning “resinous juice” and a Latin word meaning “entire leafed” FLOWER: Yellow, 2-‐3 inches across BLOOMING PERIOD: Late June to early September SIZE: 4 to 6 feet tall BEHAVIOR: Flowers are in clusters at the top of a stem. The stem is generally a reddish color in bright sun, but green in a shady site. Spreads by seeds. SITE REQUIREMENTS: Grows in a variety of soils and tolerates drought, but would prefer rich to moderately dry soils in full sun. NATURAL RANGE: Michigan south to Alabama, west to Wyoming and New Mexico. In Wisconsin it is found mostly in the southern part of the state. SPECIAL FEATURES: The rough, stalkless leaves are generally in opposite pairs with the next pair up the stem rotated 90 degrees. If the stem is broken or cut, there is a resinous gummy sap as the plant name indicates. The flowers attract birds and butterflies. SUGGESTED CARE: Water well during the first season. COMPANION PLANTS: Big bluestem, smooth aster, rattlesnake master, flowering spurge, alumroot, round-‐headed bushclover, prairie phlox, yellow coneflower, compass plant, prairie dock, blue-‐eyed grass, Indian grass, prairie dropseed, needle grass and spiderwort