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| Description | An improved Kalm's St Johns Wort. |
|---|---|
| Pronunciation | (hy-PER-ee-kum) |
| Plant Type | All Plants, Shrubs Deciduous |
| Hardiness Zone | 4-7 |
| Sunlight | full |
| Moisture | aveage, moist |
| Soil & Site | aveage, moist |
| Flowers | bright yellow, 5 petals, 5 light green/yellow sepals, mass of yellow stamens in the center, borne in cymes |
| Leaves | narrow, blueish green, mostly sessil |
| Dimensions | 2-3 by 2-3 feet (HS) |
| Native Site | endemic to the Great Lake region, USA |
| Cultivar Origin | Iowa State University, USA |
| Misc Facts | "Genus name honors Peter Kalm, a student of Linnaeus, who reportedly discovered the species plant in the wild in North America in the mid-1700s". (#144) |
| Notes & Reference | #01-Manual of Woody Landscape Plants (Michael Dirr), #144-Missouri Botanical Gardens web site (www.missouribotanicalgarden.org) |
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