Abstract: The vessel elements in the secondary xylem of two species from Proteaceae were observed by scanning electron microscope(SEM), and the difference in morphology of vessel and pits distributed of lateral wall were shown for the first time. The perforation plates of two species are simple with tail or without tail, all pits distributed in lateral wall of vessel elements in Grevillea banksii var. forsteri are alternate, while some of Banksia integrifolia are opposite-alternate, the morphology of vessel in Banksia integrifolia are primitive than Grevillea banksii var. forsteri.

Key words: vessel, perforation plate, xylem, Grevillea, Banksia