Plant Tissues

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2

ANGIOSPERMS

Dicot root

Cross section

Center of root

Xylem form “X”

Phloem at tip of xylem

Slide 19

BOTANY

Salix root, x.s.

Low magnification

Vascular bundle

Slide 20

BOTANY

Ranunculus root, x.s.

Low magnification

Vascular bundle

Slide 21

BOTANY

Angiosperms Stems

Slide 22

BOTANY

ANGIOSPERMS

Stem

Arrangement of bundles

Low magnification

Slide 23

BOTANY

ANGIOSPERMS

Bundle in stem

Phloem (top)

Cambium (middle)

Xylem (bottom)

(which is interior)

Slide 24

BOTANY

ANGIOSPERMS

Growth ring (xylem)

Tilia stem

Basswood tree

Slide 25

Botany Angiosperms

Coleus stem

Cross section of bundle

Xylem -- inside

Phloem -- outside

Slide 26

BOTANY

Medicago stem, x.s.

Vascular bundles in ring

Slide 27

BOTANY

ANGIOSPERMS

Stem, composite

Cross section

Low magnification

Soft tissue

Slide 28

BOTANY

ANGIOSPERMS

Cells in stem

Thickened xylem

Cross section

Slide 29

BOTANY

Bamboo stem

Cross section

Slide 30

BOTANY

ANGIOSPERMS

Xylem cells in stem

Longitudinal section

Annular rings (left)

Spiral rings (right)

Rings reinforce the cell wall.

Slide 31

BOTANY

Tilia, 3-year stem, x.s.

Bark

Slide 32

BOTANY

Tilia stem, 3-year, x.s.

Slide 33

BOTANY

Angiosperms Leaf

Slide 34

BOTANY

Castalia leaf

Cross section

Floating water plant