Quick and easy scrub top pattern
In a pinnately compound leaf, the middle vein is called the midrib. Pinnately compound leaves take their name from their feather-like appearance the leaflets are arranged along the middle vein, as in rose leaves or the leaves of hickory, pecan, ash, or walnut trees. Examples of plants with palmately compound leaves include poison ivy, the buckeye tree, or the familiar house plant Schefflera sp. A palmately compound leaf has its leaflets radiating outwards from the end of the petiole, like fingers off the palm of a hand. Each leaflet is attached to the rachis (middle vein), but may have its own stalk.
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Compound leaves are a characteristic of some families of higher plants. In a compound leaf, the leaf blade is completely divided, forming leaflets, as in the locust tree. An example of this type is the maple leaf. The leaf shape may also be formed of lobes where the gaps between lobes do not reach to the main vein. In a simple leaf, such as the banana leaf, the blade is completely undivided. (d) The honey locust has double compound leaves, in which leaflets branch from the veins. (c) In pinnately compound leaves, the leaflets branch from the midrib, as on a scrub hickory ( Carya floridana). (b) In palmately compound leaves, such as those of the horse chestnut ( Aesculus hippocastanum), the leaflets branch from the petiole. Compound leaves may be palmate or pinnate. In compound leaves, the lamina is separated into leaflets. (a) The banana plant ( Musa sp.) has simple leaves. In simple leaves, the lamina is continuous. Simple and compound leaves: Leaves may be simple or compound. There are two basic forms of leaves that can be described considering the way the blade (or lamina) is divided.
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In a compound leaf, the leaf blade is divided, forming leaflets that are attached to the middle vein, but have their own stalks.In a simple leaf, the blade is completely undivided leaves may also be formed of lobes where the gaps between lobes do not reach to the main vein.The edge of the leaf is called the margin. Most leaves have a midrib, which travels the length of the leaf and branches to each side to produce veins of vascular tissue. Leaves also have stipules, small green appendages usually found at the base of the petiole. Leaves that do not have a petiole and are directly attached to the plant stem are called sessile leaves. Some leaves are attached to the plant stem by a petiole. stipule: small green appendage usually found at the base of the petioleĮach leaf typically has a leaf blade called the lamina, which is also the widest part of the leaf.lamina: the flat part of a leaf the blade, which is the widest part of the leaf.petiole: stalk that extends from the stem to the base of the leaf.In a whorled arrangement, three or more leaves connect at a node. In an opposite leaf arrangement, two leaves connect at a node.Plants with alternate and spiral leaf arrangements have only one leaf per node.The arrangement of leaves on a stem is known as phyllotaxy leaves can be classified as either alternate, spiral, opposite, or whorled.The arrangement of veins in a leaf is called the venation pattern monocots have parallel venation, while dicots have reticulate venation.Some leaves have a petiole, which attaches the leaf to the stem leaves that do not have petioles are directly attached to the plant stem and are called sessile leaves.Each leaf typically has a leaf blade ( lamina ), stipules, a midrib, and a margin.