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Evolution of Woody and Seed Plants

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(1)

Evolution of Woody and Seed Plants

(2)
(3)
(4)

Secondary growth from lateral meristems:

vascular cambium & cork cambium.

(5)
(6)

Seed

= embryo enclosed by nutritive tissue, surrounded by seed coat

(7)

Seed Evolution

(8)
(9)
(10)
(11)
(12)
(13)
(14)

Adaptive significance of

seeds

(15)

eustele – single ring of vascular

bundles

(16)

ARCHEOPTERIS

(17)

“PTERIDOSPERMS” — “SEED

FERNS”

(18)

Medullosa

(19)
(20)
(21)

Cycadophyta – Cycads

(22)

Extant Cycads

(23)

Ginkgophyta—Ginkgo

(24)

Ginkgo

(25)

Seed Plants

(26)

Coniferophyta—Conifers

(27)

Coniferophyta—Conifers

(28)

Coniferophyta—Conifers

(29)

Coniferophyta—Conifers

(30)

Coniferophyta—Conifers

(31)

Coniferophyta—Conifers

(32)

Coniferophyta—Conifers

(33)

Coniferophyta—Conifers

(34)

Coniferophyta—Conifers

(35)

Coniferophyta—Conifers

(36)

Coniferophyta—Conifers

(37)

Coniferophyta—Conifers

(38)
(39)

Pinaceae

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Pinus

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Cedrus

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Abies

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Picea

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(45)
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Cupressaceae

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Cupressus

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Juniperus

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Thuja

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(52)
(53)

Taxaceae

(54)

Taxus baccata

(55)

Coniferae – conifers

(56)
(57)

Gnetales Ephedraceae

One genus:

Ephedra (35-45 spp.) Morman Tea E. sinica:

ma-huang – Chinese herbal medicine ephedrine – alkaloid weight loss, stimulant now banned.

(58)

Ephedraceae

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(60)

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