Cornus canadensis, 68. suecica, 67.
"Hardy Perennials and Old Fashioned Flowers" by John Wood
Cornus florida 157 LXXX.
"Handbook of the Trees of New England" by Lorin Low Dame
The remaining Cornus require little or no pruning.
"Trees and Shrubs for English Gardens" by Ernest Thomas Cook
THIRD PROVING OF "CORNUS ALTERNIFOLIA" 30TH DILUTION.
"New, Old, and Forgotten Remedies: Papers by Many Writers" by Various