A recent study found that P. breweriana had a basal position, followed by P. sitchensis, and the other species were further divided into three clades, suggesting that Picea originated in North America.
Un estudo recente encontrou que P. breweriana ten unha posición basal, seguida por P. sitchensis, e mais as outras especies dividíronse en tres clados, suxestionando que a Picea orixinouse en América do Norte.