Table 2 Comparison of overlong IGSs in the 41 Pteridaceae cpDNAs

Adiantum aleuticum

932

110

402

566

4785

305

157,519

Adiantum capillus-veneris

944

114

448

740

1600

290

150,568

Adiantum flabellulatum

935

114

380

749

1593

289

152,063

Adiantum malesianum

6877

116

447

-

1265

295

154,671

Adiantum nelumboides

833

124

433

-

1260

292

149,956

Adiantum reniforme var. sinense

669

124

433

-

1270

292

150,102

Adiantum shastense

929

119

402

568

1584

293

150,414

Adiantum tricholepis

878

110

405

765

1378

286

150,470

Antrophyum semicostatum

7061

92

-

664

-

279

150,274

Haplopteris elongata

944

87

419

797

-

232

156,002

Scoliosorus ensiformis

901

99

-

757

-

208

145,327

Vaginularia trichoidea

6880

90

-

537

1200

211

147,102

Vittaria appalachiana

3067

95

-

723

-

201

149,531

Vittaria graminifolia

4817

72

-

735

-

183

151,035

Gastoniella chaerophylla

826

99

360

751

1301

209

148,099

Onychium japonicum

820

106

379

807

3221

332

150,156

Pityrogramma trifoliata

831

108

394

751

1237

273

148,156

Pteris arisanensis

779

105

493

747

7391

320

160,191

Pteris ensiformis

778

105

461

700

1923

321

148,985

Pteris multifida

773

111

518

744

4076

325

153,916

Pteris semipinnata

783

105

498

873

8272

321

162,270

Pteris vittata

826

106

454

776

3549

243

154,106

Taenitis blechnoides

7346

113

530

766

2617

310

157,301

Tryonia myriophylla

584

6943

493

750

2564

294

156,327

Acrostichum speciosum

443

116

3953

503

3730

-

156,095

Ceratopteris cornuta

879

134

1984

492

1684

322

149,424

Ceratopteris thalictroides

886

133

1984

491

1683

322

149,399

Coniogramme intermedia

2593

105

393

725

1590

305

153,561

Cryptogramma acrostichoides

744

105

397

741

1241

306

150,162

Llavea cordifolia

818

103

416

721

1563

229

149,387

Bommeria hispida

793

118

447

765

1581

6872

156,749

Calciphilopteris ludens

846

119

416

752

4874

301

157,068

Cheilanthes micropteris

875

109

4760

722

1568

199

157,257

Hemionitis subcordata

851

119

422

758

9179

304

165,631

Myriopteris covillei

858

125

440

765

1570

306

155,548

Myriopteris lindheimeri

865

121

453

769

1567

306

155,770

Myriopteris scabra

849

122

438

761

5336

3877

162,051

Notholaena standleyi

863

113

445

751

6635

199

159,556

Paragymnopteris bipinnata var. bipinnata

862

133

-

771

1565

303

150,736

Pellaea truncata

862

124

461

694

1567

305

150,713

Pentagramma triangularis

908

114

443

3890

1558

194

153,445