Blechnum
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Plants in the genus Blechnum (as circumscribed in the PPG I classification) are mainly terrestrial or grow on rocks; few are epiphytes. Their rhizomes may be upright or creeping and have scales with entire margins or at most a few very small teeth. They generally form stolons, which is a characteristic of the genus. The sterile and fertile fronds are usually of the same form or at most slightly different. The blades of the fronds are of one colour and are usually pinnatisect or unipinnate, rarely entire. The leaf veins are usually free, dividing one to three times, each ending near the frond margin in an enlarged tip. The sori have indusia (scale-like coverings).
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Species
Using the PPG I circumscription, as of December 2019, the Checklist of Ferns and Lycophytes of the World accepted the following species and hybrids.
- Blechnum anthracinum R.C.Moran
- Blechnum appendiculatum Willd.
- Blechnum arcuatum J.Rémy ex Fée
- Blechnum areolatum V.A.O.Dittrich & Salino
- Blechnum asplenioides Sw.
- Blechnum auriculatum Cav.
- Blechnum australe L.
- Blechnum austrobrasilianum de la Sota
- Blechnum × caudatum Cav.
- Blechnum × confluens Schltdl. & Cham.
- Blechnum × falciculatum C.Presl
- Blechnum gracile Kaulf.
- Blechnum gracilipes (Rosenst.) M.Kessler & A.R.Sm.
- Blechnum guayanense A.Rojas
- Blechnum hastatum Kaulf.
- Blechnum heringeri Brade
- Blechnum laevigatum Cav.
- Blechnum lanceola Sw.
- Blechnum × leopoldense (Dutra) V.A.O.Dittrich & Salino
- Blechnum longipilosum V.A.O.Dittrich & Salino
- Blechnum ludificans Herter
- Blechnum malacothrix Maxon & Morton
- Blechnum meridense Klotzsch
- Blechnum occidentale L.
- Blechnum × pampasicum de la Sota & M.L.Durán
- Blechnum polypodioides Raddi
- Blechnum punctulatum Sw.
- Blechnum tomentosum M.Kessler & A.R.Sm.