VASCULAR PLANTS:VASCULAR PLANTS:TRACHEOPHYTESTRACHEOPHYTES

FERNS AND FERN ALLIESFERNS AND FERN ALLIES

Club mosses and whisk tails

Figure 29.23x7 Life cycle of a fern: archegoniaFigure 29.23x7 Life cycle of a fern: archegonia

The antheridia The antheridia and and archegonia are archegonia are found on the found on the underside of underside of the the gametophyte.gametophyte.

FERN FERN GAMETOPHYTESGAMETOPHYTES

Haploid or diploid?Haploid or diploid?

What generation is What generation is dominant in ferns?dominant in ferns?

Notice the Notice the young young sporophyte sporophyte growing from growing from the the gametophytegametophyte

Ground Pine Ground Pine LYCOPODIUMLYCOPODIUM

VASCULAR PLANTS: VASCULAR PLANTS: FERNS AND FERN ALLIESFERNS AND FERN ALLIES

Scouring Rushes Ferns

(Horse Tails)

Figure 29.21x2 HorsetailFigure 29.21x2 Horsetail

Figure 29.23x6 Life cycle of a fern: gametophyteFigure 29.23x6 Life cycle of a fern: gametophyte

Figure 29.24a Fern sporophyll, a leaf specialized for spore productionFigure 29.24a Fern sporophyll, a leaf specialized for spore production

Figure 29.0 FernsFigure 29.0 Ferns

Figure 29.25 Artist’s conception of a Carboniferous forest based on fossil Figure 29.25 Artist’s conception of a Carboniferous forest based on fossil evidenceevidence

Figure 29.23 The life cycle of a fernFigure 29.23 The life cycle of a fern

Figure 29.23 The life cycle of a fernFigure 29.23 The life cycle of a fern

11 structure

109

8

5

32 cell

4

1 process

7

6 process

Figure 29.23x8 Life cycle of a fern: sporophytesFigure 29.23x8 Life cycle of a fern: sporophytes

Figure 29.23x1 Life cycle of a fern: mature fernFigure 29.23x1 Life cycle of a fern: mature fern

Figure 29.24b Fern sporophyll, a leaf specialized for spore productionFigure 29.24b Fern sporophyll, a leaf specialized for spore production

These are SORI. (singular = sorus)These are SORI. (singular = sorus)

Each contains many SPORANGIA (spore cases)Each contains many SPORANGIA (spore cases)

Figure 29.23x2 Life cycle of a fern: sorusFigure 29.23x2 Life cycle of a fern: sorus

Notice the individual sporangia

Figure 29.23x4 Life cycle of a fern: mature sporangiumFigure 29.23x4 Life cycle of a fern: mature sporangium

Figure 29.23x3 Life cycle of a fern: sporangiumFigure 29.23x3 Life cycle of a fern: sporangium

Figure 29.23x5 Life cycle of a fern: germinatingFigure 29.23x5 Life cycle of a fern: germinating