Petiole (botany) - Wikipedia
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.
Petiole - Definition and Function - Biology Dictionary
2016年12月17日 · 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.
13.1: Leaf Parts and Arrangement - Biology LibreTexts
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.
Understanding the Difference Between Stems and Stalks in Plants
2023年11月18日 · The stem or stalk of a leaf is known as the petiole. This is the slender stem that attaches the leaf blade to the plant’s main stem or branch. The petiole serves to support the leaf blade, positioning it to intercept sunlight and facilitating photosynthesis.
Parts of a Leaf With Their Structure and Functions - Science Facts
2023年2月2日 · A typical leaf shows three main parts: 1) petiole, 2) leaf base, and 3) leaf blade or lamina, each performing specific functions. Parts of a Leaf Diagram. 1. Petiole. It is the stalk that connects a leaf to the stem of the plant, it is made of complex conducting tissues called vascular tissues. Functions.
Petiole | plant anatomy | Britannica
The petiole is a stalk that connects the blade with the leaf base. The blade is the major photosynthetic surface of the plant and appears green and flattened in a plane perpendicular to the stem. Read More
4.1: Leaf structure - Biology LibreTexts
2024年1月30日 · The flat part of the leaf is called the lamina or blade. Leaves normally attach to the stems by a short stalk called the petiole. The leaf lamina has a midrib where the vascular tissues are located. From the midrib, smaller veins, also containing vascular tissue, branch out. The edge of the blade is called the margin (Figure \(\PageIndex{2 ...
30.8: Leaves - Leaf Structure and Arrangment - Biology LibreTexts
2023年10月31日 · Petioles, stipules, veins, and a midrib are all essential structures of a leaf. Within each leaf, the vascular tissue forms veins. The arrangement of veins in a leaf is called the venation pattern. Monocots and dicots differ in their patterns of venation.
Science of Leaves: Anatomy, Arrangement, & Adaptations
2023年7月12日 · It’s usually just referred to as the leaf stalk and is that part of the leaf that connects the stem of the plant to the blade. However, some plants have leaves that connect directly to the stem, and these are called sessile leaves.
Leaf | Definition, Parts, & Function | Britannica
Typically, a leaf consists of a broad expanded blade (the lamina), attached to the plant stem by a stalklike petiole. In angiosperms leaves commonly have a pair of structures known as stipules, which are located on each side of the leaf base and may resemble scales, spines, glands, or leaflike structures.