It discuss about the great Greek scientist Theophrastus. It explains on his life history, father of botany, his work, contributions, work on botany, finding, publications and honorary,

1. THEOPHRASTUS
DR. C. BEULAH JAYARANI
M.Sc., M.A, M.Ed, M.Phil (Edn), M.Phil (ZOO), NET, Ph.D (Edn)
ASST. PROFESSOR,
LOYOLA COLLEGE OF EDUCATION, CHENNAI - 34

2. 09-06-2021
Dr. C. Beulah Jayarani
2

3. THEOPHRASTUS
FATHER OF BOTANY
Greek Theophrastus is Known as
the father, or founder, of botany. He
wrote two large books, i) On the
History of Plants and
ii) On the Causes of Plants.
He also developed a theory of plant
growth and wrote about how
plants were structured. He
identified and described 550
different plants.

4. ABOUT THEOPHRASTUS
BORN : 370 BC
DIED: 287 BC
GREEK PHILOSOPHER
Favourite Student of ARISTOTLE
Leader of Lyceum
Numerous Experiments for classifying Plants and
Animals
FATHER OF BOTANY/TAXONOMY
In charge of first BOTANICAL GARDEN
09-06-2021
Dr. C. Beulah Jayarani
4

5. HIS WORKS
Books on Logic, Metaphysics,
Natural Science, Medicine, Politics,
Epistemology and Ethics
His work on ‘The Senses’ had
ideas of earlier philosophers
‘The Characters’ sketches human
peculiarities and life in Ancient
Greece
09-06-2021
Dr. C. Beulah Jayarani
5

6. Conducted experiments and explorations. Most
of his books are lost
 ‘Description of the World’
‘Salt, Nitre and Alum’
‘Animals which Bite and Sting’
‘Animals which live on Dry Land’
‘Animals which change their colour’
Found mineral ‘TOURMALINE’ charged when
heated – First Reference to Pyroelectricity
OTHER WORKS
09-06-2021
Dr. C. Beulah Jayarani
6

7. THEOPHRASTUS KNOWN FOR
He is best known for his work with
plants. He has often been referred to as
the first scientific botanist, and two of
his practical, yet influential, books on
the subject have survived into
modern times
09-06-2021
Dr. C. Beulah Jayarani
7

8. THOUGHTS AND WORK ON BOTANY
09-06-2021
Dr. C. Beulah Jayarani
8

9. 09-06-2021
Dr. C. Beulah Jayarani
9

10. 09-06-2021
Dr. C. Beulah Jayarani
10

11. Two surviving Botanical works
 ‘The Enquiry into Plants’ – 10 books / 9 exists
1. Parts of plants
2. Reproduction of plants(germination),manner of
sowing
3,4 and 5- Devoted to Trees, their types, locations,
practical Applications
6.Shrubs and spiny plants
7.Herbs
8.Plants that produce edible seeds
9.Plants that produce useful juices, gums, resins
09-06-2021
Dr. C. Beulah Jayarani
11

12. ‘On the Causes Of Plants’ – 8 books/6 books
exists
 Concerns with the Growth of plants
 Proper time for their sowing and reaping
 Methods of preparing soil
 Manuring
 Smell, taste and properties of plants
 Effect of environmental changes on growth of plants
 Propagation of cereals
 Plant disease and death
09-06-2021
Dr. C. Beulah Jayarani
12

13. 09-06-2021
Dr. C. Beulah Jayarani
13

14. HONORARY
09-06-2021
Dr. C. Beulah Jayarani
14

15. REFERENCES
 TN TEXT BOOK
 NCERT READER
 DISCOVERY
 WIKIPEDIA
09-06-2021
Dr. C. Beulah Jayarani
15