THE third “Lieferung” of the first part continues the large subject of branching in ferns and seed-plants. Axillary branching is discussed, as also the exceptions thereto, such as epiphyllous displacement of the lateral branch, and dichotomy in palms. Accessory or supernumerary axillary shoots and their independent origin from the meristem of the axil-tissue are described. The section on the structure of lateral shoots is replete with interesting and varied examples. Vergleichende Morphologie der höheren Pflanzen Von Prof. Dr. Wilhelm Troll. Band 1: Vegetations-organe. Teil 1, Lieferung 3. Pp. xii+509–955. (Berlin: Gebrüder Borntraeger, 1937.) 39.50 gold marks.