Abstract: This paper examined pollen grains of Helicia Lour., Heliciopsis Sleum. and Grevillea R. Br. with LM, SEM and TEM. The result showed that the exine sculpture and the thickness of va-rious wall layers of Heliciopsis, on the one hand, are different from these of Helicia, the former with reticulate sculpture and thicker wall layers(tectum 0.5-0.7um, columellae 0.8-1 um, foot layer 1-1.5 um, the total exine 2.5-3 um), the latter with scabrate-granulate sculpture and thin-ner wall layers(tectum 0.3-0.4 um, columellae 0.15-0.2 um, foot layer 0.5-0.6 um, the total exine only 1-1.2 um), and on the other hand are similar to those of Sphalmium and Carnarvonia, both of which also have reticulate sculpture and thicker wall layers. Palynology supports Sleumer's view to separate Heliciopsia from Helicia.

Key words: Proteaceae