0
50000
100000
150000
200000
250000
300000
350000
400000
450000
Plants
Bryophyta Pteridophyta Gymnosperms Angiosperms
Number of plant species
0
200000
400000
600000
800000
1000000
1200000
1400000
1600000
Number of animal species
Fig. 5 Number of known plant (a) and animal (b) species
170
M. Wink