A new classification scheme is proposed for managed second-growth forests, which is based upon ecologically equivalent sites rather than purely floristic or structural characteristics of vegetation. For demonstration purposes, six structural (developmental) stages were sampled and classified. The seral stages, listed in increasing age after harvesting are as follows: initial, regeneration, early immature, late immature, mature, and old growth. The results of numerical and tabular analyses suggested the presence of two major floristic groups (seral associations) of the above seral stages: (i) Epilobium – Polytrichum (initial and regeneration seral stages) and (ii) Pseudotsuga – Hylocomium (early immature to old growth seral stages). The Epilobium – Polytrichum seral association was found to represent seral vegetation of regeneration stages on four different site types, all of which are common in southwestern British Columbia.