DR. JAKOB ERIKSSON describes in a lengthened paper the protomeristem of the roots of Dicotyledons, and directs attention to the four great types of structure observable in these roots. In the ...

Bot., 6, No. 21, January, 1942) on the organization of the shoot of Heracleum Sphondylium leads to an interesting comparison of the mode of growth of the dicotyledon and the monocotyledon.

American Journal of Botany, Vol. 3, No. 1 (Jan., 1916), pp. 24-39 (16 pages) There is a very clearly marked correlation between leaf-margin and environment in the distribution of Dicotyledons in the ...