1901-1913 519, 204, 192, 252 p., roy. 4to, half cloth. A few pages soiled. Last six pages of volume reinforced and with repaired holes (with some loss of text). First 16 pages of volume one in xerox-copy. Ex library Dr. C.G.G.J. van Steenis (with his ex libri). Working copy. First editions of the first four supplements covering the period 1886-1910.Cornelis Gijsbert Gerrit Jan van Steenis (1901-1986) was a Dutch botanist. Very active in the study of Indonesian (Asian) plants, and was responsible for editing the series Flora Malesiana. He was professor in tropical botany in Amsterdam and Leiden, and also director of the Dutch National Herbarium.