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Angiosperms. Gymnosperms. Charophyceans. Seedless vascular plants. Bryophytes (nonvascular plants). 30 nm. http://botit.botany.wisc.edu/images/130/Meiosis/Lilium_microsporogenesis/Phragmoplast_Cell_Plate.low.jpg. Chara , a pond organism. (a). 10 mm. 40 µm.

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slide2

Angiosperms

Gymnosperms

Charophyceans

Seedless vascular plants

Bryophytes (nonvascular plants)

slide5

http://botit.botany.wisc.edu/images/130/Meiosis/Lilium_microsporogenesis/Phragmoplast_Cell_Plate.low.jpghttp://botit.botany.wisc.edu/images/130/Meiosis/Lilium_microsporogenesis/Phragmoplast_Cell_Plate.low.jpg

slide6

Chara,

a pond

organism

(a)

10 mm

40 µm

Coleochaete orbicularis, a disk-

shaped charophycean (LM)

(b)

slide14

Viridiplantae

Streptophyta

Plantae

Red algae

Chlorophytes

Charophyceans

Embryophytes

Ancestral alga

slide19

Figure 29.19 Sphagnum, or peat moss: Peat bog in Oneida County, Wisconsin (top), closeup of Sphagnum (bottom left), Sphagnum "leaf" (bottom right)

slide20

Land plants

Vascular plants

Bryophytes

(nonvascular plants)

Seedless vascular plants

Seed plants

Mosses

Liverworts

Hornworts

Angiosperms

Gymnosperms

Charophyceans

Pterophytes

(ferns, horsetails, whisk ferns)

Origin of seed plants

(about 360 mya)

Lycophytes

(club mosses, spike mosses, quillworts)

Origin of vascular

plants (about 420 mya)

Origin of land plants

(about 475 mya)

Ancestral

green alga

slide21

Vascular tissue

(a)

Microphylls, such as those of lycophytes, may have

originated as small stem outgrowths supported by

single, unbranched strands of vascular tissue.

Megaphylls, which have branched vascular

systems, may have evolved by the fusion of

branched stems.

(b)

slide25

Figure 29.21 Pteridophytes: club "moss" (top left), whisk fern (top right), horsetail (bottom left), fern (bottom right)

slide26

Homosporous spore production

Eggs

Typically a

bisexual

gametophyte

Sporangium

in sporophyll

Single

type of spore

Sperm

Heterosporous spore production

Megasporangium

in megasporophyll

Female

gametophyte

Megaspore

Eggs

Microsporangium

in microsporophyll

Male

gametophyte

Microspore

Sperm