| The three leaved hellebore, helleborus trifolius, for dyeing wood yellow, is used in Canada. |
| Be very cautious about growing poisonous plants, like castor bean or hellebore, in readily accessible areas. |
| Mayapple, bloodroot, pokeweed, nightshade and hellebore are other alkaloidal plants. |
| De Abano in the fourteenth century included mercury, copper, lapis lazuli, arsenic sublimate, litharge, nux vomica, laurel berries, and hellebore in his De Remedis Venenorum. |
| Nonephemerals that bloom during the summer or fall are Canada lily, false hellebore, and species of aster, goldenrod, and sunflower. |
| This seems to me like it would be a difficult color range to achieve, considering the amount of blue in most hellebore flowers. |
