Introduction Most of the early literature on asparagus is concerned with the application of fertilizer under field conditions, with the breeding of desirable strains, and with the improvement of cultural practices without regard to the details of structure and growth of the plant. Recently NIGHTINGALE and SCHERMERHORN (6) made a study of the nitrogen nutrition of the asparagus plant, and there are being conducted, during the progress of this work, further experiments on the mineral requirements, the record of which will appear later. The present work was undertaken for the purpose of obtaining a more complete knowledge of the anatomy of the plant as a foundation for a better understanding of the mineral requirements, nutrition, and of experimental selection and breeding.