Question

What is a stipule of a leaf ?​

Answer 1

Answer:

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Explanation:

stipule A leafy or linear appendage, found, usually in pairs, at or near the base of the petiole of a leaf. Stipules are often variously patent (i.e. spreading), but may be adpressed to petiole or twig. Occasionally they are amplexicaul (i.e. surrounding and clasping the twig). These uncommon positions are valuable aids to plant identification

Answer 2

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Explanation:

Stipules :- It is the lateral appendages on either side of a leal base present in some plants.

Those leaves which have stipule is called as stipulate leaf.

Example - Fabaceae

And those which do not have stipule is known as ex-stipulate leaf.

Example - Liliaceae

Stipules are various types :-

1. Free lateral :- Those base in which stipules are present freely on both sides.

eg - Hibiscus rosasinensis (China rose).

2. Tendrillar :- Those stipules which have structure like tendrils.

eg - Smilax.

3. Spiny :- Those which have structure like spine.

eg - Zizyphus (Ber).

4. Foliaceous :- Leaf like structure stipules.

eg - Pea.

5. Ochreat :- When due to combination of two stipules a tube like structure is formed then it is known as echreat.

eg - Polygonum.

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