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Title: More Modifications of Stems
Description: With examples and pictures to fully understand. Contains 3 general classifications. Every type is discussed.
Description: With examples and pictures to fully understand. Contains 3 general classifications. Every type is discussed.
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1
...
Produce shoots annually
A
...
It has distinct nodes and internodes
...
Terminal buds also present
...
- May grow obliquely (Alocasia, Dryopteris, Banana etc
...
)
B
...
A cluster of adventitious roots arise from the base of the bulb
...
Or, scaly bulb, without any tunic (Lily)
...
CORM
- Condensed form of rhizome growing in vertical direction
...
Has distinct circular nodes and internodes
...
D
...
- It is covered by a corry Skin with a number small depressions called eyes’
...
Rhizome
Bulb
Corm
Tuber
2
...
Aerial branches and adventitious roots grow at nodes
A
...
- The nodes bear axillary buds, scale leaves and adventitious roots
...
- Examples are Cynodon (Lawn grass), Oxalis (Wood sorrel), Centella (Or
...
- An underground runner is called sobole, e
...
Agropyron
...
SUCKER
- Arises from the basal, underground part of the main stem
...
- Examples are Chrysanthemum (Or
...
STOLON
- Weak lateral branch that arises from the base of main stem
...
- Examples are Jasmine, Colocasia, and Vellisneria etc
...
OFF SET
- Short runner with one internode long
...
Produces a rosette of leaves above and adventitious roots below
...
Sobole
Sucker
Off set
Stolon
3
...
TENDRILS
- Its branches get modified into green thread like leafless structures called tendrils which are
meant for climbing
...
- A scale leaf is always present at the point of branching of the tendril
...
THORNS
- Straight, pointed, hard or woody structures sometimes they bear leaves, flowers or even may
be branched
...
Khirkoli) terminal bud gets modified into thorns
...
g
...
C
...
- The leaves are modified into spines or scales to check transpiration
...
D
...
- May be one internode long (Asparagus) or two internode long (Ruscus)
E
...
- In Dioscorea, bulbils are condensed axillary buds while in Agava and lily the floral buds develop
into bulbil
...
Tendrils
Thorn
Phyllocalde
Cladode
Bulbil
Title: More Modifications of Stems
Description: With examples and pictures to fully understand. Contains 3 general classifications. Every type is discussed.
Description: With examples and pictures to fully understand. Contains 3 general classifications. Every type is discussed.