Dedication to the memory of B.H. Danser
(first published in Flora Malesiana Ser. I vol. 4 (1948-1954) 6-13)

Dedication to the memory of A.A. Pulle
(first published in Flora Malesiana Ser. I vol. 5 (1955-1958) 6-7)

Dedication to the memory of Elmer Drew Merrill
(first published in Flora Malesiana Ser. I vol. 6 (1960-1972) 6-16)