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Lake Pickett, Florida, United States
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Astor Farms, Florida, United States
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Florida, United States
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Wedgefield, Florida, United States
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Florida, United States
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This is a section of the rhizome of a fern, Pleopeltis percussa. To counter the fungal infection the cells produce lignin. Lignin makes the cell walls woody. With this strategy the plant tries to prevent the fungal infection to spread further.
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Here, Acridin Red, a fluorescent stain, has been used to color the lignified cellwalls. You can see that the infected cells have an anomalous shape.
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2010.06.13 Lower Austria, Hollabrunn/Thaya National Park (320 m AMSL).Sporangia (depending on species) in summer or fall.German name: TpfelfarnID: Fischer & al., Exkursionsflora (2008 3rd): I cannot determine beyond the species aggregate P. vulgare agg. - there are two possibles: P. vulgare s. str. and P. interjectum (or a hybrid of both); to decide which one sporangia (and possibly a microscope) would be necessary.
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Details of the vascular bundles. Each vascular bundle is surrounded by a bundle sheath (brown).
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2011-10-23 Lower Austria, district Melk - Ysperklamm (630 msm Quadrant 7656/3).German name: Gewhnlich-Tpfelfarn, Engelsss
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This is a cut of a fern frond. On the outside are lignified cells (red) to give the fern frond stability. Inside (green, white) is the pulp. There are two vascular bundles. Each vascular bundle is surrounded by a bundle sheath (brown).
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2011-09-25 Lower Austria, district Krems-Land: Wachau - Drnstein (370 msm Quadrant 7559/3).German name: Gewhnlich-Tpfelfarn, EngelsssLeaf - underside, with sporangia.
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2011-10-23 Lower Austria, district Melk - Ysperklamm (630 msm Quadrant 7656/3).German name: Gewhnlich-Tpfelfarn, EngelsssAlso with leaves of
Acer pseudoplatanus in the foreground, a typical ravine forest tree - here in Ysper gorge however not as dominant as
Acer platanoides (of which there also are plenty of leaves - in the background, in bokeh).
For dominance of Acer species in Ysper gorge see also here.
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2011-09-25 Lower Austria, district Krems-Land: Wachau - Drnstein (370 msm Quadrant 7559/3).German name: Gewhnlich-Tpfelfarn, Engelsss
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2010.06.13 Lower Austria, Hollabrunn/Thaya National Park (320 m AMSL).Sporangia (depending on species) in summer or fall.German name: TpfelfarnID: Fischer & al., Exkursionsflora (2008 3rd): I cannot determine beyond the species aggregate P. vulgare agg. - there are two possibles: P. vulgare s. str. and P. interjectum (or a hybrid of both); to decide which one sporangia (and possibly a microscope) would be necessary.
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2011-09-25 Lower Austria, district Krems-Land: Wachau - Drnstein (350 msm Quadrant 7559/3).German name: Gewhnlich-Tpfelfarn, Engelsss
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Hb. FH 20XX/YYY - Herbarium Falkner Hermann (20XX/No YYY) (DIN AX)leg.: Falkner Hermann, 20XX-YY-ZZ: Niedersterreich, Bezirk XYZ - LOCATION: 180 msm Quadrant 7964/4.det.: Falkner Hermann, nach Fischer & al., Exkursionsflora A/FL/SdT (2008 3. A.)Dt: NAME; English: NAMESynonyme: NAMENQuadrant 8262/1 415 msm
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2010.06.13 Lower Austria, Hollabrunn/Thaya National Park (320 m AMSL).Sporangia (depending on species) in summer or fall.German name: TpfelfarnID: Fischer & al., Exkursionsflora (2008 3rd): I cannot determine beyond the species aggregate P. vulgare agg. - there are two possibles: P. vulgare s. str. and P. interjectum (or a hybrid of both); to decide which one sporangia (and possibly a microscope) would be necessary.
