A PAPER by C. P. Majumdar (Ann. 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 ...

This is a preview. Log in through your library . Abstract Dicotyledonous angiosperms commonly possess a hierarchical leaf vascular system, wherein veins of different orders have different functions.

While this foliar survey of 38 species of evergreen dicotyledons from New Zealand is too limited for generalizations, it reveals a wide range and a high average both for blade and tissue thickness.