Taxonomy

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Taxonomy

• Plant Science I

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What is Taxonomy

• Taxonomy is an organizational system for
  descriptive classification of plant.
• Puts plants into different categories

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How to Classify Plants

• Phytogenetic
• How they look
• Environmental
• Where they grow
• Agricultural
• What use they are grown for
• Natural/Morphological
• how their structures compare

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Scientific Classification

• World wide language for naming
• Latin
• Common Names are often Regional
• Names are not recognized worldwide
• Based on morphology

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Scientific Classification

• Divisions within this system are called taxa
• 7 Major taxa
• Kingdom
• Phyllum
• Class
• Order
• Family
• Genus
• Species

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Taxa

• In this class we will focus primarily on the
  Plantae kingdom.
• Contains mosses, ferns, seed plants, and several
  minor groups.

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Taxa

• Subdivision Tracheobionata the vascular plants
• Spermatophyta seed plants
• Gymnospermae naked seeded plants. Mostly
  evergreen type plants
• Angiospermae Plants that have seeds protected
  by fruit
• Monocotyledoneae - monocots
• Dicotyledoneae dicots

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Taxa

• Phylum is broken down into 12 categories
• Based for the most part on reproductive
  structures
• Tissue structure and seed type are also factored
  in

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Phyla - All end in -ophyta

• Kingdom Plantae Plants
• Division  Anthocerotophyta Hornworts
• Division  Bryophyta Mosses
• Division  Hepatophyta Liverworts
• Subkingdom  Tracheobionta -- Vascular plants
• Division  Equisetophyta Horsetails
• Division  Lycopodiophyta Lycopods
• Division  Psilophyta -- Whisk-ferns
• Division  Pteridophyta Ferns
• Superdivision  Spermatophyta -- Seed plants
• Division  Coniferophyta Conifers
• Division  Cycadophyta Cycads
• Division  Ginkgophyta Ginkgo
• Division  Gnetophyta -- Mormon tea and other
  gnetophytes
• Division  Magnoliophyta -- Flowering plants

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Taxa

• Lower taxa
• In plants we classify past species
• Form
• Variety or Cultivar

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Naming

• Binomial Nomenclature the scientific system of
  giving a two word name to plants
• Uses the Genus and species
• Example Cornus florida
• Based on a system developed by Linneaus

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Classifying Plants

• Herbaceous die back to the ground each year
• Annual Plant that finishes it entire lifecycle
  in 1 year
• Biennial plant that finishes its lifecycle in 2
  years
• Perennial A plant that lives for more that 2
  years

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Classifying plants

• Woody harder stems, have buds that survive the
  winter above ground
• Deciduous loses leaves in the fall
• Evergreen stays green all year

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THE END !!!