What are the types of stipules?
What are the types of stipules?
The three types of stipules according to duration are caducous, deciduous and persistent. Caducous stipules fall off before the leaf unfolds, while deciduous stipules fall off immediately after the leaf unfolds. Persistent stipules remain attached to the plant.
What are leaf stipules?
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).
What are Interpetiolar stipules?
Interpetiolar stipule is a stipule which is located on the stem between the petioles of opposite leaves. It is formed because of the fusion of two stipules of opposite leaves. The numbers of leaves present at each node are one and the number of stipules at each node is two. Example: Coffee plant.
What do you mean by stipules?
stipule. / (ˈstɪpjuːl) / noun. a small paired usually leaflike outgrowth occurring at the base of a leaf or its stalk.
What is absent in a typical leaf?
Stipules: Stipules are the lateral appendages of the leaf borne at its base. When these stipules are present, the leaf is said to be stipulate and when absent exstipulate. Sometimes, as in Cltioria, a small stipule may be present at the base of each leaflet.
What is difference between petiole and stipule?
As nouns the difference between petiole and stipule is that petiole is (botany) the stalk of a leaf, attaching the blade to the stem while stipule is (botany) basal appendage of a typical leaf of a flowering plant, usually appearing paired beside the petiole although sometimes absent or highly modified.
Do stipules protect axillary?
Stipules may develop into tendrils, hairs, spines and scales, etc. On the other hand, an axillary bud is a small bud present in the axil. Axillary buds develop into branches or flowers. They contain young shoot tissues, and the shoot apex controls the growth of axillary bud.
Which tissue is present in leaf stalk below epidermis?
a) Collenchyma is the tissue found below the epidermis of a leaf stalk. These are simple permanent tissue, perform photosynthesis when chloroplast is present.
Is pedicel a petiole?
The key difference between petiole and pedicel is that the petiole is the stalk of a leaf while the pedicel is the stalk of an individual flower. In botany, petiole and pedicel are two terms we use to refer two different stalks. Pedicel joins an individual flower to the stem or to the peduncle of an inflorescence.
What is the function of stipules in Capparis spinosa?
(viii) Spinous stipules are those which are modified to form spinous structures, e.g. in Capparis Spinosa (Capparidaceae), Zizyphus mauritiana (Rhamnaceae), Acacia sp‘ (Mimosaceae) etc. the stipules are modified into sharp pointed structures. These spines serve as defensive function.
What are the different types of stipule in plants?
Stipule in a Plant: Type # 7. Ochreate: Present in the form of a tubular sheath round the internode, e.g., Polygonum. Stipule in a Plant: Type # 8. Spinous: Present in the form of hard spines, e.g., Acacia nilotica.
What kind of stipel is found in Zizyphus?
Tendrillar stipules are found in Smilax zeylanica (Liliaceae). (viii) Spinous stipules are those which are modified to form spinous structures, e.g. in Capparis Spinosa (Capparidaceae), Zizyphus mauritiana (Rhamnaceae), Acacia sp‘ (Mimosaceae) etc. the stipules are modified into sharp pointed structures. These spines serve as defensive function.
What kind of stipules are hair like in nature?
Hairy stipules : These are hair like stipules which are dry in nature, e.g., Anacampsora. Modification of stipule : To carryout different functions, stipules of some plants undergo modifications. They are classified as follows : Foliaceous : Green, expanded, leaf like stipules are called foliaceous stipules.