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Blechnaceae
Blechnaceae image
Paul Rothrock
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Raymond B. Cranfill in Flora of North America (vol. 2)
Plants perennial, mostly terrestrial, occasionally on rock or epiphytic. Stems creeping to suberect or ascending, sometimes climbing [rarely arborescent], slender to stout, dictyostelic, scaly. Leaves monomorphic or dimorphic, large and coarse, generally greater than 30 cm, often exceeding 1 m. Petiole not articulate, generally more than 2 vascular bundles arranged in arc, generally scaly at least at base. Blade often anthocyanic (reddish) when young, pinnatifid [rarely simple] to pinnate-pinnatifid or 2-pinnate [rarely decompound], glabrous or occasionally bearing scales or capitate glands. Rachis frequently grooved adaxially. Veins of sterile leaves generally free, rarely anastomosing, veins of fertile leaves united to form sorus-bearing secondary vein parallel to costa or costule (vascular commisure), sometimes anastomosing further. Sori elongate along secondary vein; indusia present [rarely absent], opening along costal side of fertile vein, frequently hidden by dehisced sporangia; sporangial stalk of 3 rows of cells. Spores monolete, reniform; perine present, variously ornamented. Gametophytes green, cordate, sometimes bearing capitate hairs, antheridia and archegonia borne on lower surface. Circumscription of genera is controversial, especially as to placement of those species now included in Blechnum . Characteristics holding the family together include the anastomoses of veins along the axes of the blade to form a series of areoles or a single continuous vein along which the sorus is borne, elongate sori with indusia opening toward midvein, bilateral spores, and chromosome base numbers of generally x = 28--36. Relationships of the family with both dryopteroid and athyrioid ferns have been suggested. Stenochlaena tenuifolia (Desvaux) T. Moore, native to the Old World, was reported as escaped from cultivation in the 1930s in southern Florida; it has not been collected there recently. It is distinguished by having climbing stems and by having contracted, 2-pinnate fertile leaves with sporangia covering the abaxial surface.

<< 51 - 100 taxa >>
Blechnum australe
Image of Blechnum australe
Blechnum austrobrasilianum
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Blechnum caudatum
Image of Blechnum caudatum
Blechnum confluens
Image of Blechnum confluens
Blechnum gracile
Image of Blechnum gracile
Blechnum gracilipes
Image of Blechnum gracilipes
Blechnum guayanense
Image of Blechnum guayanense
Blechnum hastatum
Image of Blechnum hastatum
Blechnum heringeri
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not available
Blechnum laevigatum
Image of Blechnum laevigatum
Blechnum lanceola
Image of Blechnum lanceola
Blechnum leopoldense
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not available
Blechnum longipilosum
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Blechnum ludificans
Image of Blechnum ludificans
Blechnum malacothrix
Image of Blechnum malacothrix
Blechnum meridense
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Blechnum nipponicum
Image of Blechnum nipponicum
Blechnum norfolkense
Image of Blechnum norfolkense
Blechnum occidentale
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Blechnum parrisii
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Blechnum polypodioides
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Blechnum punctulatum
Image of Blechnum punctulatum
Blechnum tomentosum
Image of Blechnum tomentosum
Blechnum x caudatum
Image of Blechnum x caudatum
Blechnum x confluens
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Blechnum x falciculatum
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not available
Blechnum x leopoldense
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Blechnum x pampasicum
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Brainea insignis
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Cleistoblechnum eburneum
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Cranfillia bakeri
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not available
Cranfillia caudata
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Cranfillia deltoides
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Cranfillia deplanchei
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not available
Cranfillia feani
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Cranfillia fluviatilis
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Cranfillia fullagari
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Cranfillia geniculata
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Cranfillia glabrescens
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Cranfillia hirsuta
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Cranfillia longicauda
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Cranfillia mucronata
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not available
Cranfillia nigra
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Cranfillia opaca
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Cranfillia pilosa
Image of Cranfillia pilosa
Cranfillia sampaioana
Image of Cranfillia sampaioana
Cranfillia venosa
Image of Cranfillia venosa
Cranfillia vulcanica
Image of Cranfillia vulcanica
Diploblechnum acuminatum
Image of Diploblechnum acuminatum
Diploblechnum diversifolium
Image of Diploblechnum diversifolium

The PCC, and this data portal, were made possible by funding from the National Science Foundation’s Advancing Digitization of Biological Collections (ADBC) program, grant numbers 1802504, 1802352, 1802134, 1802033, 1802270, 1802255, 1802239, 1802446, 1802305.
The pteridoportal taxonomic thesaurus is based on the Checklist of Ferns and Lycophytes of the World, generously provided by Michael Hassler.