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Thalictrum aquilegifolium (Columbine Meadow Rue)
| Date | Action |
| Feb 16 2009 | Netty (13946) added "5b (to -10 F / -23 C)" to Zones / Hardiness |
| Feb 16 2009 | Netty (13946) added "5a (to -15 F / -26 C)" to Zones / Hardiness |
| Feb 16 2009 | Netty (13946) added "Perennial" to Plant Types |
