RH Botany, Plant Identification & Materia Medica 2 — Questions and Answers
Question 1: Which plant family is characterized by square stems, opposite leaves, and bilaterally symmetrical flowers?
- Apiaceae
- Lamiaceae (Correct answer)
- Asteraceae
- Rosaceae
Correct answer: Lamiaceae
Lamiaceae (mint family) is defined by its square stems, opposite leaves, and two-lipped (bilabiate) corollas.
Question 2: The doctrine of signatures held that Pulmonaria officinalis was useful for lung conditions primarily because of its:
- Bitter taste
- Spotted leaves resembling lung tissue (Correct answer)
- Purple flowers
- Hairy stems
Correct answer: Spotted leaves resembling lung tissue
Lungwort's white-spotted leaves were interpreted as resembling diseased lung tissue, making it a classic doctrine of signatures example.
Question 3: Which part of Valeriana officinalis is used medicinally, and what is its primary traditional indication?
- Leaves, for digestive complaints
- Root, for nervous system support and sleep (Correct answer)
- Flower, for cardiovascular support
- Seed, for respiratory conditions
Correct answer: Root, for nervous system support and sleep
Valerian root contains valerenic acid and iridoids that support relaxation and sleep, making it one of the most studied nervine herbs.
Question 4: An umbel is the characteristic inflorescence of which plant family, important for both medicinal and toxic species?
- Fabaceae
- Solanaceae
- Apiaceae (Correct answer)
- Brassicaceae
Correct answer: Apiaceae
Apiaceae (carrot family) produces compound umbels and includes both valuable medicinal plants (fennel, angelica) and deadly species (poison hemlock).
Question 5: Adaptogens such as Eleutherococcus senticosus are distinguished from general tonics by their ability to:
- Stimulate the immune system specifically
- Normalize physiological function regardless of the direction of imbalance (Correct answer)
- Increase energy through caffeine-like mechanisms
- Reduce inflammation via COX-2 inhibition
Correct answer: Normalize physiological function regardless of the direction of imbalance
True adaptogens exert a bidirectional, normalizing effect — raising depressed functions and moderating excessive ones — without organ-specific targeting.
Question 6: Which identifying feature distinguishes Hypericum perforatum (St. John's Wort) from other Hypericum species?
- Red sap when leaves are crushed
- Translucent oil glands visible when leaves are held to light (Correct answer)
- Woody base with alternate leaves
- Aquatic habitat preference
Correct answer: Translucent oil glands visible when leaves are held to light
The perforated appearance of H. perforatum leaves — caused by translucent secretory glands — is the key field identification feature referenced in its species name.
Question 7: In herbal materia medica, the term 'alterative' refers to herbs that:
- Produce immediate diuretic effects
- Gradually restore proper metabolic function and elimination (Correct answer)
- Directly kill pathogens
- Reduce fever by promoting sweating
Correct answer: Gradually restore proper metabolic function and elimination
Alteratives (also called 'blood purifiers') work slowly to improve tissue nutrition and waste removal, traditionally used for chronic skin and inflammatory conditions.
RH Botany, Plant Identification & Materia Medica 2
Which plant family is characterized by square stems, opposite leaves, and bilaterally symmetrical flowers?