From: Evolution of the rpoB-psbZ region in fern plastid genomes: notable structural rearrangements and highly variable intergenic spacers
Stem length (base pair)
Equisetum ramosissimum
E. arvense1
E. arvense2
3
21
24
28
4
2
5
8
12
6
22
7
16
9
10
13
0
Total
68
78
82