Chap5

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By: janithbandara (19 month(s) ago)

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By: Fawad.Azimi (40 month(s) ago)

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Flowers: 

Flowers

Generalized Flower: 

Generalized Flower Pg. 74 Calyx, Corolla, Stamen, Pistil Sexual reproduction structure Inflorescence (Fig. 5.5 Pg. 78) Complete vs. Incomplete Flower All floral parts – Missing one or more parts Perfect vs. Imperfect Flower Both male/female parts – Male or female

Slide12: 

hypogynous perigynous epigynous

Slide15: 

Foxglove (Digitalis purpurea) - raceme

Slide16: 

Skunk cabbage (Lysichitum americanum) - spike

Slide17: 

Alder (Alnus spp.) - catkin

Slide18: 

Dogwood (Cornus spp) - corymb

Slide19: 

Cow parsnip (Heracleum lanatum) – compound umbel

Slide20: 

Sunflower (Helianthus spp) - head

Flowering Plants: 

Flowering Plants Monoecious A single individual plant with both male and female flowers Dioecious An individual plant has either male or female flowers

Pollination: 

Pollination The transfer of pollen from the stamen (anther) to the pistil (stigma) Self or Cross Pollination Mechanisms of: Animals (birds, bats, insects) Colors, rewards (nectar - pollen), Attractants (nectar guides, aroma, landing stages, mimicry Wind

Fertilization: 

Fertilization Fusion of sperm and egg to form zygote Double Fertilization Feature unique to angiosperms Following fertilization a seed develops each ovule gives rise to a seed the number of ovules in an ovary varies from one to many Seeds embryo, endosperm, seed coat seed coat from integuments of ovule

Seed Dispersal: 

Seed Dispersal Wind The plant itself - Tumbleweed Water Animals Storage Ingestion, external transport (hooks - barbs) Explosions (dehiscence)

Seed Dispersal: 

Seed Dispersal Importance of: Colonization Survival of species Wildlife preservation Community structure (assemblages of plants and animals) Global climate Environmental quality