1. Monday, 19 November 2018
EJDB

2. Functional Morphology of Angiosperms cont’d
Each plant has an integrated group of organ systems.
Every plant has:
a root system; comprises the whole of the root of a plant and
a shoot system;
made up of two main organs:-
- the stem
- the leaves
- (the flowers)
Plant body of an Angiosperm
Monday, 19 November 2018
EJDB

3. Functional Morphology of Angiosperms cont’d
Seed Structure
The dicot embryo:
Monday, 19 November 2018
EJDB

4. Functional Morphology of Angiosperms cont’d
Seed Structure contd.
The monocot embryo:
Monday, 19 November 2018
EJDB

5. Functional Morphology of Angiosperms cont’d
Seed Structure – Types of Seed Germination
There are two types of seed germination –
Hypogeal germination Epigeal germination
Monday, 19 November 2018
EJDB

6. Functional Morphology of Angiosperms cont’d
Seed Germination – The Root System
Tap root system
Monday, 19 November 2018
EJDB

7. Functional Morphology of Angiosperms cont’d
The Root System contd.
Branch roots, whether arising from root or stem, are endogenous in origin – arise from within the tissues.
Monday, 19 November 2018
EJDB

8. Functional Morphology of Angiosperms cont’d
The Root System contd.
Fibrous root system
Monday, 19 November 2018
EJDB

9. Functional Morphology of Angiosperms cont’d
The Shoot System - Structure
The Leaf - Structure
Monday, 19 November 2018
EJDB

10. Functional Morphology of Angiosperms cont’d
Leaf types - Simple leaves
Bilobed
Pinnately lobed
Simple Leaf: Entire margin
Palmately lobed
Digitately lobed
Monday, 19 November 2018
EJDB

11. Functional Morphology of Angiosperms cont’d
Leaf types - Compound Leaves
Trifoliolate
Bipinnate
Imparipinnate
Digitate
Paripinnate
Monday, 19 November 2018
EJDB

12. Functional Morphology of Angiosperms cont’d
Leaf position or arrangement
Phyllotaxy is the arrangement of leaves on the stem or branch.
Leaves are said to be alternate when there is one leaf at each node arranged singly and at different levels on either side of the stem of a plant or
more commonly arranged in a spiral around the stem, e.g. Hibiscus rosa-sinensis, Helianthus annuus.
Monday, 19 November 2018
EJDB

13. Functional Morphology of Angiosperms cont’d
Leaf position or arrangement cont,d
Leaves are said to be whorled when three or more are attached at each node, e.g. Nerium oleander, Alstonia boonei, Allamanda cathartica.
Leaves are said to be rosette when they appear as a cluster at the same node at the base of the stem, e.g. Acalypha, Begonia, Dandelion, Agave, lettuce (Lactuca sativa).
Monday, 19 November 2018
EJDB