Table 1.

Sampled groups

Group	N orders	N families	N genera	N sequences
The Plantae Kingdom (plants)
Magnoliophyta (angiosperms)	43	203	1544	2572
Pinophyta and Gnetophyta (gymnosperms)	3	6	40	201
Filicophyta (ferns)	1	10	39	156
Lycopodiophyta (clubmosses)	1	1	3	27
Equisetophyta (horsetails)	1	1	1	19
Bryophyta (mosses)	8	20	42	88
Charophyta (green algae)	1	1	6	49
Plastid-carrying eukaryotes which are not in the Plantae Kingdom
Phaeophyta (brown algae)	4	11	30	48
Bacillariophyta (diatoms)	6	10	15	20
Rhodophyta (red algae)	6	10	14	20
Euglenida (euglenid protists)	2	2	5	11
Prokaryotes
Cyanobacteria	2	4	8	17
Sum	78	279	1747	3228