Medicinal Plants Lecture 8

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Questions and Answers

Which of these options are correct? (Select all that apply)

  • Taxonomy (correct)
  • Physiology (correct)
  • Anatomy (correct)
  • Introduction to Pharmacognosy (correct)
  • Dusting powders (correct)

Taxonomy is the science of describing, naming and classification of organisms.

True (A)

What is the grouping of organisms based on similarities called?

Classification

Why are scientific names necessary?

<p>Because the same common name is used for different plants in different areas of the world.</p> Signup and view all the answers

What language is used for scientific classification?

<p>Latin</p> Signup and view all the answers

When writing a scientific name, the genus name is capitalized and the species name is not.

<p>True (A)</p> Signup and view all the answers

What family does Ocimum africanum belong to?

<p>Lamiaceae</p> Signup and view all the answers

What information does the surname of the person indicate in a scientific name?

<p>The person who first named the plant (Author)</p> Signup and view all the answers

What are the main characteristics of the Angiosperm group of plants?

<p>All of the above (E)</p> Signup and view all the answers

Gymnosperms produce flower-like structures called cones.

<p>True (A)</p> Signup and view all the answers

Which of the following plant characteristics is most likely associated with monocot plants?

<p>Parallel vein patterns in leaves (D)</p> Signup and view all the answers

What family does corn belong to?

<p>Poaceae</p> Signup and view all the answers

Ginger, curcuma and cardamom belong to which plant family?

<p>Zingiberaceae (A)</p> Signup and view all the answers

To which family does onion belong?

<p>Liliaceae (A)</p> Signup and view all the answers

Which type of stomata is commonly found in plants of the Solanaceae family?

<p>Anisocytic (B)</p> Signup and view all the answers

Tracheids are mostly found in Angiosperms.

<p>False (B)</p> Signup and view all the answers

Flashcards

Taxonomy

The science of describing, naming, and classifying organisms.

Binomial system

A two-part naming system for organisms (Genus species).

Scientific name

The unique, internationally recognized name for a plant species using the binomial system.

Genus

A group of closely related species.

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Species

The most specific category of classification representing a group of close, naturally interbreeding organisms.

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Family

A group of genera that share similar characteristics.

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Monocot

Plants with one cotyledon (seed leaf), parallel leaf venation, floral parts in multiples of 3 (often).

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Dicot

Plants with two cotyledons (seed leaves), net-like leaf venation, floral parts in multiples of 4 or 5.

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Angiosperm

Flowering plants, with seeds enclosed within a fruit.

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Gymnosperm

Plants with exposed seeds not enclosed in a fruit.

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Study Notes

Medicinal Plants Lecture Notes

  • Lecture 8 Topics: Anatomy (Lectures 1-7), Dusting powders, Taxonomy (Lecture 6), Physiology, Introduction to Pharmacognosy
  • Taxonomy: The science of describing, naming, and classifying organisms. Organism grouping is based on similarities. Scientific names are essential because the same common name can be used for different plants in different regions. Latin is the language used for scientific classification.
  • Binomial System: A two-part naming system for scientific names. The first part is the genus (always capitalized). The second part is the species (never capitalized). Both words are italicized or underlined. Example: Ocimum africanum (Genus: Ocimum, Species: africanum)
  • Family Classification (Examples):
    • Compositae/Asteraceae: Sunflower family
    • Umbelliferae/Apiaceae: Carrot or Parsley family
    • Cruciferae/Brassicaceae: Mustard or Cabbage family
    • Labiatae/Lamiaceae: Mint family
    • Gramineae/Poaceae: Rice, maize, wheat family
    • Leguminosae/Fabaceae: Bean or pea family
  • Scientific Classification of Syzygium aromaticum L. (Clove):
    • Kingdom: Plantae
    • Clade: Tracheophytes
    • Clade: Angiosperms
    • Clade: Eudicots
    • Clade: Rosids
    • Order: Myrtales
    • Family: Myrtaceae
    • Genus: Syzygium
    • Species: aromaticum
    • Binomial name: Syzygium aromaticum (L.) Merr. & L.M.Perry (Author: L.)
    • Synonyms: Various (e.g., Caryophyllus aromaticus, Eugenia aromatica)
  • Example of Monocot: Maize plant (Note: Monocot plant features include parallel leaf venation and a single cotyledon)
  • Example of Dicot: Mentha plant (Note: Dicot plant features include net-like leaf venation and two cotyledons)
  • Monocot Families:
    • Gramineae (Poaceae): (Oryza sativa (Rice), Triticum aestivum (Wheat)): Caryopsis fruit, parallel leaf venation
    • Zingiberaceae: (Ginger, Curcuma (turmeric)): Rhizomatous and sympodial stems
    • Liliaceae: (Squill, Colchicum): Food stored in a bulb or rhizome, basal and cauline leaves
  • Dicot Families (Examples): Umbelliferae (Apiaceae), Solanaceae (Potato, Tomato), Compositae (Asteraceae), Leguminosae (Fabaceae), Lamiaceae (Mint family)
  • Plant Origins (Example): The dried leaves of Mentha piperita (Family: Lamiaceae)
  • Species Name Considerations: Morphological characteristics, Geographic source (e.g., Olea europea, Cannabis indica), Special indications (e.g., Quillaia saponaria)
  • Old Classification (Two Kingdoms): Animalia and Plantae (Linnaeus 1758), Separating subkingdoms like Thallophyta and Embryophyta
  • New Classification (Five Kingdoms): Whittaker's classification, including Monera, Protista, Fungi, Animalia, and Plantae (1920-1980 – Important dates)
  • Plant Parts:
  • Plant Kingdom Types
  • Angiosperm: Flowering plants, stems with xylem tissue (vessels), ovules and seeds enclosed in ovaries(fruits), closed carpels/fruits
  • Gymnosperm: Cone-bearing plants, stems with tracheids, ovules and seeds exposed/unenclosed
  • Quiz Questions: Identification (monocot vs. dicot), stomata type, plant family, etc.

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