PCG 202University of IbadanOct 18, 2026
28 Common Plants - Pharmacognosy Cheatsheet
Structure
8 Concept Stages
Practice Exam
76+ Questions
Active Recall
Exam-Matched
Executive Topic Summary
Interactive mental model study tree.
High-Yield Exam Takeaways
- Nightshades & Solanaceous Medicinals: Datura metel
- Asteraceae Powerhouses: Ageratum, Chromolaena & Vernonia
- Tropical Fruit Pharmacopeia: Mango, Pawpaw & Guava
- African Medicinal Trees: Morinda, Rauwolfia & Alstonia
- Aromatic Medicinals: Cymbopogon, Ocimum & Allium
- Apocynaceae Specialists: Calotropis, Parquetina & Nerium Relatives
- Fabaceous Laxatives & Euphorbiaceous Medicinals: Senna, Cassia & Jatropha
- Diverse Medicinal Specialists: Zingiber, Terminalia, Ficus & Newbouldia
Study Tree Preview (Bite-Sized Concepts)
1Nightshades & Solanaceous Medicinals: Datura metel
5 Micro-BitesMeet Datura metel: The Beautiful but Potent Nightshade:Let's start with one of the most pharmacologically fascinating plants in your exam: <term def="a tropical nightshade plant with large trumpet-shaped flowers containing powerful tro...
The Tropane Alkaloid Cocktail: Nature's Neurochemical Toolkit:Now, here's what makes Datura so pharmacologically significant. The plant produces a precise blend of <term def="a class of nitrogen-containing compounds built on a bicyclic tropan...
2Asteraceae Powerhouses: Ageratum, Chromolaena & Vernonia
8 Micro-BitesAgeratum conyzoides: The Versatile Goat Weed:Let's move to a plant you might actually have growing as a weed near you: <term def="a small herbaceous plant with fluffy blue-purple flowers, commonly called Goat Weed or Whitewee...
The Chemical Toolkit of Ageratum: Five Major Classes:Here's what your exam will test: Ageratum contains not one or two, but five distinct chemical classes working together. You have <term def="nitrogen-containing compounds with diver...
3Tropical Fruit Pharmacopeia: Mango, Pawpaw & Guava
8 Micro-BitesMangifera indica: More Than Just a Sweet Fruit:Let's examine a plant you've definitely eaten: <term def="the mango tree, producing one of the world's most popular tropical fruits with significant pharmacological properties">Man...
Mangiferin: The Signature Xanthone of Mango:The star compound is <term def="a xanthone glycoside found predominantly in mango leaves and bark, with potent antioxidant, anti-inflammatory, and antidiabetic properties">mangifer...
Sample Practice Questions (Active Recall)
Q1.Which of the following best explains why atropine from Datura metel produces mydriasis (pupil dilation)?
AIt inhibits acetylcholinesterase, increasing acetylcholine at the neuromuscular junction
BIt stimulates muscarinic acetylcholine receptors on the iris sphincter muscle
CIt activates alpha-adrenergic receptors causing sympathetic stimulation
DIt blocks muscarinic acetylcholine receptors, preventing parasympathetic-mediated pupil constriction
Q2.The Yoruba traditional name for Datura metel is ______.
Q3.Scopolamine crosses the blood-brain barrier more readily than atropine, accounting for its stronger sedative and anti-motion sickness properties.
ATrue
BFalse
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