During the past ten years we have studied in detail the rare Gaylussacia brachycera and have seen forty different colonies. We are presently studying plants from thirty-two of these colonies, transplanted into similar cultural conditions. We have examined herbarium material of the species from twenty-five institutions of this and other countries. In the course of our study we have recorded bibliographic data concerning this fascinating species. At the suggestion of Earl L. Core we have brought some of this material together for publication in order that others may benefit from the fruits of our studies.