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18 sty 2024 · Compare petiolate and sessile leaves. Distinguish among alternate, opposite, and whorled phyllotaxes. Compare simple, pinnately compound, and palmately compound leaves.
The petiole is a stalk that attaches a leaf to the plant stem. In petiolate leaves the leaf stalk may be long (as in the leaves of celery and rhubarb), or short (for example basil). When completely absent, the blade attaches directly to the stem and is said to be sessile.
17 gru 2016 · The petiole is the stalk that supports a leaf in a plant and attaches it to the stem. Many people often call it a stem, which is incorrect. A stem is the part of the plant that serves as the main source of support and produces nodes and roots, and that’s not what we observe in petioles.
Leaves with petiole are called petiolate while those without petiole, are called sessile. They may be short or long and cylindrical. Sometimes, it is flattened as in the case of lemon.
In general, leaves may be petiolate, with a petiole, or sessile, without a petiole. Leaflets of a compound leaf are, correspondingly, either petiolulate or sessile. (The term subsessile is sometimes used for a leaf/leaflet with a small, rudimentary petiole/petiolule.)
The Petiole. Most leaves have a stem that attaches the blade of the leaf to the rest of the plant. This is the petiole. However, in some plants, the leaves do not have a petiole and the blade is directly attached to the plant stem. These leaves are sessile (lacking a petiole).
21 lis 2023 · Leaves that attach with a petiole are known as petiolate, whereas leaves with blades that attach directly to the stem are called sessile leaves. Petioles have several functions. One is to serve...
