Abstract

1. The 2 points of interest in the study of the anatomy of Lycopodium reflexum are the presence of typical cortical roots and the various "types" of stele in the stem. 2. The development and differentiation of the tissues in the steles of the cortical roots parallel those in the stele of the stem. 3. There are 3 arrangements of the xylem: radial, parallelbanded, and a radial arrangement so modified as to consist of an inner cylinder of xylem inclosing a small strand of phloem. The last is the most frequently found. 4. The study confirms my former suggestions that all arrangements of xylem may occur in the same stem in species of Lycopodium

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