Abstract

In the past issues, only the pollen morphology of the dicotyledonous plants was reported. This time, the pollen morphology of monocotyledonous plants is also included, namely, 23 families, comprising of 147 genera and 282 species of dicotyledons, and 21 families comprising of 88 genera and 147 species of monocotyledons are described. The signs, A, B, C, D, E, F, and G in 70 plates are to designate: A, equatorial view; B, polar view; C, exine stratification; D, sexine pattern; E, grains without definite view; F, tetrads; and G, polyads. The shape of grains is usually expressed by the ratio between polar axis and equatorial axis (P/E) of outline of grains, and the size of grains is often shown as polar axis times equatorial axis (P X E) as proposed by Erdtman (1952). But the pollen size of monocotyledonous plants is expressed slightly differently from that of dicotyledons. In addition to measuring the diameter of grains (I) and P X E (II), it is commonly expressed here as aXbXc (III) where'a' means the width and 'b' means the length of grains at polar view, and 'c' means height of grains at equatorial view in 1-sulcate grains, and 'a' (distal-polar) or 'c' (proximal-polar) time 'b' (grains folded along the polar axes) as suggested by Sladkov (1961) in the trilet grains (IV).The following diagram on page 74 is an example to illustrate the different views of grains and the way to measure the pollen size for most grains of monocotyledonous plants.