Web Banner

Listed below are the names of photos that can be found in each Photo Unit. You may click on the Table of Contents link to go to a Photo Unit to see the photos. Click on a unit below to go directly to that units' list of photos.

Photo Unit 1 | Photo Unit 2 | Photo Unit 3 | Photo Unit 4 | Photo Unit 5 | Photo Unit 6
Photo Unit 7 | Photo Unit 8 | Photo Unit 9 | Photo Unit 10 | Photo Unit 11
Photo Unit 12 | Photo Unit 13 | Photo Unit 14 | Photo Unit 15 | Photo Unit 16 | Photo Unit 17
Photo Unit 18 | Photo Unit 19


Photo Unit 1: Plant Body

1-1: Hordeum (Barley) Young embryo LP

1-2: Hordeum (Barley) Young embryo HP

1-3: Hordeum (Barley) Embryonic leaves of shoot apex MP

1-4: Hordeum (Barley) Young embryo Shoot apex HP

1-5: Hordeum (Barley) Young embryo Root apex MP

1-6: Hordeum (Barley) Young embryo Root apex HP

1-7: Palm (Palm) Embryo LP

1-8: Palm (Palm) Embryo MP

1-9: Palm (Palm) Embryo Shoot primordium HP

1-10: Palm (Palm) Embryo Shoot primordium MP

1-11: Palm (Palm) Embryo Added leaf primordial MP

1-12: Palm (Palm) Embryo Root primordium MP

1-13: Palm (Palm) Embryo Root primordium HP

1-14: Palm (Palm) Embryonic root tip with root cap. MP

1-15: Palm (Palm) Embryonic root tip with root cap. HP

1-16: Palm (Palm) Seed pericarp

1-17: Zea (Corn) Several celled age 1

1-18: Zea (Corn) Embryo Young age 2

1-19: Zea (Corn) Embryo Young age 3

1-20: Zea (Corn) Mature embryo age 4

1-21: Zea (Corn) Embryo coleoptile

1-22: Zea (Corn) Embryo shoot apex

1-23: Zea (Corn) Embryo developing prop root

1-24: Zea (Corn) Embryo mesocotyl


Photo Unit 2: Plant Cell

2-1: Smilax (Carrion flower); Transverse section old root cortex

2-2: Smilax (Carrion flower); Transverse section old root cortex (subepidermal)

2-3: Diospyros (Persimmon); Sectioned seed endosperm

2-4: Diospyros (Persimmon); Sectioned seed endosperm (980x)

2-5: Phoenix (Palm); Sectioned seed endosperm

2-6: Phoenix (Palm); Sectioned seed endosperm (980x)


Photo Unit 3: Meristems

3-1: Allium root tip (l.s.)

3-2: Allium root tip (l.s.)


Photo Unit 4: Dermal System; Epidermis

4-1: Allium (Onion); Surface view of epidermis

4-2: Allium (Onion); Bulb scale, c.s. (epidermis, bulb scale)

4-3: Erythronium (dog-tooth violet); Surface view of leaf epidermis

4-4: Erythronium (dog-tooth violet); Leaf surface (x 980)

4-5: Capsella (shepherd's purse); Epidermis of stem, t.s

4-6 A: Peperomia (peperomia); Upper leaf epidermis, t.s.

4-6 B: Peperomia (peperomia); Lower leaf epidermis, t.s.

4-7: Pelargonium (geranium); Leaf surface. (epidermis) (x100)

4-8: Pisum (pea); Seed coat epidermis, t.s.

4-9: Echinopsis glochids

4-10: Echinopsis glochids

4-11: Echinopsis glochids

4-12: Echinopsis glochids

4-13: Echinopsis glochids

4-14: Echinopsis glochids

4-15: Echinopsis glochids

Back to top


Photo Unit 5: Dermal System; Periderm

5-1: Pelargonium (geranium); Stem w/ secondary cortex, t.s

5-2: Sambucus (elder); Young lenticel, t.s. stem

5-3: Sambucus (elder); Older lenticel, t.s. stem

5-4: Sambucus (elder); Old (well-developed) lenticel, t.s. stem,


Photo Unit 6: Fundamental System; Parenchyma

6-1: Helianthus (sunflower); t.s. young stem, pith tissue

6-2: A Helianthus(sunflower); stem pith ray

6-3: Capsella (shepherd's purse); t.s. stem pith ray (dark field)

6-4: Lilium (lily); t.s. stem pith ray

6-5: Lilium (lily); t.s. rhizome cortex. t. s.

Back to top


Photo Unit 7: Collenchyma & Sclerenchyma

7-1: Cucurbita (squash); t.s. stem cortex, angular collenchyma tissue

7-2 A: Malva (common mallow); stem cortex t.s. lacunate collenchymas LP

7-2 B: Malva (common mallow); stem cortex t.s. lacunate collenchymas MP

7-2 C: Malva (common mallow); stem cortex t.s. lacunate collenchymas HP

7-2 D: Malva (common mallow); stem cortex t.s. lacunate collenchymas MP

7-2 E: Malva (common mallow); stem cortex t.s. lacunate collenchymas HP

7-3: Helianthus (sunflower); stem cortex t.s.

7-4: Helianthus (sunflower); stem cortex l.s.

7-5 A: Apium (celery); leaf petiole t.s. MP

7-5 B: Apium (celery); leaf petiole t.s. LP

7-5 C: Apium (celery); leaf petiole t.s. HP

7-6 A: Tilia (basswood); macerated bark of stem (bast fibers)

7-6 B: Tilia (basswood); t.s. 2-year stem phloem, bast fibers HP

7-6 C: Tilia (basswood); t.s. 2-year stem phloem, bast fibers OI

7-7: Prunus (peach); macerated fruit stone sclereids

7-8: Prunus (peach); sectioned pericarp

7-9: Aristolochia (Dutchman's pipe): t.s. stem with sclereids

Back to top


Photo Unit 8: Vascular System: Xylem

8-1: Pinus (pine); tracheid, macerated xylem

8-2: Pinus (pine); tracheid, macerated xylem, simple and bordered pits

8-3: Liriodendron (tulip tree); macerated xylem

8-4: Convolvulus (hedge bindweed); l.s. stem HP

8-5: Convolvulus (hedge bindweed); l.s. stem HP


Photo Unit 9: Vascular System; Phloem

9-1: Cucurbita (squash); t.s. stem vascular bundle, phloem tissue

9-2: Cucurbita (squash); l.s. stem vascular bundle phloem tissue

9-3: Ibervilla t.s. stem phloem


Photo Unit 10: Root Tip

10-1 A: Botrychium (grape fern); l.s. root tip and apical cell LP

10-1 B: Botrychium (grape fern); l.s. root tip and apical cell HP

10-1 C: Botrychium (grape fern); l.s. root tip and apical cell OI

10-2: Phoenix (palm); l.s. root tip (median section)

10-3 A: Canna (canna); l.s. root tip (median section) LP

10-3 B: Canna (canna); l.s. root tip (median section) MP

10-3 C: Canna (canna); l.s. root tip (median section) HP

10-4: Canna (canna); t.s. Primary meristem region

10-5: Allium (onion); l.s. Primary meristem region

10-6: Zea (corn); l.s. Root tip and primary meristem region.

10-7: Species?: l.s. Differentiation zone of a root.

Back to top


Photo Unit 11: Primary Root Structure

11-1: Ranunculus (buttercup); t.s. tetrarch root stele LP

11-2: Ranunculus (buttercup); t.s. tetrarch root stele HP

11-3: Ranunculus (buttercup); t.s. triarch root stele HP

11-4: Actaea (baneberry); t.s. young root with triarch stele LP

11-5: Actaea (baneberry); t.s. young root with triarch stele

11-6: Actaea (baneberry); Young root diarch stele HP

11-7: Smilax (carrion flower); t.s. root cortex

11-8: Smilax (carrion flower); t.s. stele

11-9: Smilax (carrion flower); t.s. stele dark field

11-10: Smilax (carrion flower); t.s. stele dark field

11-11: Smilax (carrion flower); root cortex and stele HP

Back to top


Photo Unit 12: Secondary Root Structure

Diameter Growth

12-1A: Ranunculus (buttercup); t.s. secondary root LP

12-1B: Ranunculus (buttercup); t.s. root pentarch stele HP

12-1C: Ranunculus (baneberry); t.s. older stele secondary root OI

12-2A: Ranunculus (baneberry); t.s. tetrarch root

12-2B: Ranunculus (baneberry); tetrarch stele

12-3: Actaea (baneberry); root stele: t.s. young root LP

12-4: Actaea (baneberry); root stele: t.s. young root MP

12-5: Actaea (baneberry); root stele: t.s. intermediate root

12-6: Actaea (baneberry); root stele: t.s. old root MP

12-7: Actaea (baneberry); root stele: t.s. old root HP

12-8: Raphanus (radish); t.s. root, hypocotyls cortex crushed

12-9: Raphanus (radish); t.s. hypocotyls, cortex split

12-10: Raphanus (radish); c.s. root (hypocotyl), approaching maturity

Back to top


Photo Unit 13: Stem Growing Point

13-1: Equisetum (horsetail); stem tip (apex) l.s. LP

13-2: Equisetum (horsetail); stem tip (apex) l.s. HP

13-3: Equisetum (horsetail); stem tip (apex) l.s. HP

13-4: Pinus nigra (pine); Apical initials OI

13-5: Pinus nigra (pine); Central mother cells

13-6: Pinus nigra (pine); Shoot apex with leaf primordia

13-7: Pinus nigra (pine); Procambium not differentiated. t.s. stem tip LP

13-8: Pinus nigra (pine); Procambium iniated. t.s. LP

13-9: Pinus nigra (pine); Procambial strands t.s. age 2 LP

13-10: Pinus nigra (pine); Procambial strands t.s. age 2 MP

13-11: Pinus nigra (pine); Procambial strands t.s. age 3 HP

13-12: Pinus nigra (pine); Procambial strands l.s. age 1 HP

13-13: Pinus nigra (pine); Procambial strands l.s. age 2 HP

13-14: Pinus nigra (pine); Procambial strands l.s. leaf trace

13-15: Coleus (coleus); l.s. stem tip (apex)

13-16: Coleus (coleus); l.s. stem tip bud age 1

13-17: Coleus (coleus); l.s. stem tip bud age 2

13-18: Coleus (coleus); l.s. stem tip bud age 3

13-19: Elodea (elodea); l.s. stem tip

Back to top


Photo Unit 14: Primary Stem Structure Stelar Types

Stelar Types

14-1: Psilotum: t.s. aerial stem, t.s.

14-2: Lycopodium (club moss); t.s. stem stele.

14-3 A: Gleichenia (gleichenia); t.s. rhizome (Haplostele) LP

14-3 B: Gleichenia (gleichenia); t.s. rhizome (Haplostele) MP

14-3 C: Gleichenia (gleichenia); t.s. rhizome (Haplostele) HP

14-4 A: Adiantum (maiden hair fern); t.s. rhizome LP

14-4 B: Adiantum (maiden hair fern); t.s. rhizome LP

14-4 C: Adiantum (maiden hair fern); t.s. rhizome LP

14-5: Osmunda (fern); t.s. rhizome

14-6: Spiraea (spiraea); t.s. stem

14-7: Helianthus (Sunflower); t.s. stem

14-8: Zea (corn) T.s. stem atactostele

Bundle Types

14-9: Matonia (fern); t.s. rhizome.

14-10: Scirpus (bulrush); t.s. stem vascular bundle

14-11: Cucurbita (squash); t.s. stem vascular bundle

14-12: Acorus (sweet flag): t.s. rhizome, vascular bundle

14-13: Pteridium (fern); t.s. Rhizome vascular bundle

14-15: Anthurium
14-16: Aristolochia
14-17: Aristolochia
14-18: Begonia
14-19: Bougainvilla
14-20: Bougainvilla
14-21: Dianthus
14-22: Dianthus
14-23: Dianthus
14-24: Dianthus
14-25: Dracaena
14-26: Dracaena
14-27: Dracaena
14-28: Ibervilla
14-29: Ibervilla
14-30: Ibervilla
14-31: Jatropha
14-32: Lycopodium
14-33: Matonia
14-34: Matonia
14-35: Menispermum
14-36: Menispermum
14-37: Monocot sp
14-38: Osmunda
14-39: Monocot sp

14-40: Osmunda
14-41: Osmunda
14-42: Phaseolus
14-43: Podophyllum
14-44: Podophyllum
14-45: Podophyllum
14-46: Polypodium
14-47: Polypodium
14-48: Polypodium
14-49: Psilotum
14-50: Pteridium
14-51: Pteridium
14-52: Salicornia
14-53: Salicornia
14-54: Solanum
14-55: Species
14-56: Scirpus
14-57: Tetracera
14-58: Tetracera
14-59: Tetracera
14-60: Tetracera
14-61: Tradescantia
14-62: Tradescantia
14-63: Vanda
14-64: Zebrina


Photo Unit 15: Dissection of the Stele

15-1: Salix (willow); Young leaf bearing stem LS

15-2: Salix (willow); High in internode Series 1 TS (1)

15-3: Salix (willow); Higher in internode Series 2 TS (2)

15-4: Salix (willow); Low in a node Series 3 TS (3)

15-5: Salix (willow); Higher in a node Series 4 TS (4)

15-6: Salix (willow); Leaf departing from stem Series 5 TS (5)

15-7: Salix (willow); Leaf departed from stem Series 6 TS (6)

Back to top


Photo Unit 16: Vascular Cambium Secondary Growth

16-1: Pinus (pine); T.s. section of the stem 2 year

16-2: Pinus (pine); T.s. section of a 3 year stem

16-3: Pinus (pine); T.s. section of a 6 year stem

16-4: Pinus (pine); T.s. 6 year stem, HP

16-5: Pinus (pine); T.s. 3 year stem near pith

16-6: Pinus (pine); T.s. 4 year stem near pith

16-7: Pinus (pine); radial section of young stem. LP

16-8: Pinus (pine); radial section of young stem. HP

16-9: Pinus (pine); tangential section of xylem and phloem.

16-10: Pinus (pine); Tang. L.s. primary and secondary phloem LP

16-11: Quercus (oak); Xylem tissue. T.s.stem Spring summer

16-11 B: Quercus (oak); Xylem tissue. T.s.stem with tyloses.

16-12: Tilia (basswood); Xylem tissue. T.s. stem

16-13: Fraxinus (ash); Phloem tissue. T.s. stem. HP

16-14: Tilia (basswood); T.s. stem cambial zone HP


Photo Unit 17: Monocot Stem

17-1: Acorus (sweet flag); Transverse section of rhizome

17-2: Triticum (wheat)' T.s. Eustele LP

17-3: Yucca (Spanish bayonet); Longitudinal section of stem tip

17-4: Yucca (Spanish bayonet); L.s lower down the stem apex

17-5: Dracaena (dracaena); T.s. stem primary bundle

17-6: Dracaena (dracaena); T.s. stem primary and secondary

17-7: Dracaena (dracaena); T.s. stem, early secondary bundle, HP

17-8: Dracaena (dracaena); T.s. stem, later secondary bundle HP

17-9: Dracaena (dracaena); T.s. secondary bundle HP

Back to top


Photo Unit 18: Ontogeny of the Leaf

18-1: Salix (willow); l.s. stem tip

18-2: Salix (willow); l.s. stem apex with older leaf primordia

18-3: Salix (willow); T.s. stem tip. Young primordium

18-4: Salix (willow); T.s. stem tip Older primordium

18-5: Salix (willow); T.s. stem tip. Older primordium


Mature Dicot Leaf

18-1A: Euonymous T.s. leaf lamina (blade)

18-2A: Syringa T.s. leaf midvein HP

18-3A: Rhododendron (rhododendron); Paradermal section palisade/spongy.

18-4A: Rhododendron (rhododendron); Paradermal section spongy


Mature Monocot Leaf

18-1B: Tulipa (tulip); T.s. leaf

18-2B: Iris (iris); T.s. "I-leaf"

18-3B: Iris (iris); T.s. "V-leaf" (ensheathing base)


Photo Unit 19: Floral Development

19: 1-12 Brassica (Species) 12 stages in floral development

19: 13 - 19 Rosa (Species) 7 stages in floral development

19: 20 - 43 Chrysanthemum (Species) 35 stages in floral development

19: 44 - 54 Triticum (wheat) inflorescence developmental stages

Back to top