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Leaves may also be whorled if several leaves arise, or appear to arise, from the same level (at the same node) on a stem. Veronicastrum virginicum has whorls of leaves separated by long internodes. With an opposite leaf arrangement, two leaves arise from the stem at the same level (at the same node), on opposite sides of the stem. An opposite ...
[1] [2] The Venus flytrap is a carnivorous plant that catches its prey with a trapping structure formed by the terminal portion of each of the plant's leaves, which is triggered by tiny hairs on their inner surfaces. A Venus flytrap's reactions can occur due to electric and mechanical, or movement-related, changes.
The leaf angle distribution (or LAD) of a plant canopy refers to the mathematical description of the angular orientation of the leaves in the vegetation.Specifically, if each leaf is conceptually represented by a small flat plate, its orientation can be described with the zenith and the azimuth angles of the surface normal to that plate.
2-dimensional section of Reeb foliation 3-dimensional model of Reeb foliation. In mathematics (differential geometry), a foliation is an equivalence relation on an n-manifold, the equivalence classes being connected, injectively immersed submanifolds, all of the same dimension p, modeled on the decomposition of the real coordinate space R n into the cosets x + R p of the standardly embedded ...
180° (or 1 ⁄ 2): two leaves in one circle (alternate leaves) 120° (or 1 ⁄ 3): three leaves in one circle; 144° (or 2 ⁄ 5): five leaves in two gyres; 135° (or 3 ⁄ 8): eight leaves in three gyres. Most divergence angles are related to the sequence of Fibonacci numbers F n. This sequence begins 1, 1, 2, 3, 5, 8, 13; each term is the ...
Most plants have an epidermis that is a single cell layer thick. Some plants like Ficus elastica and Peperomia, which have a periclinal cellular division within the protoderm of the leaves, have an epidermis with multiple cell layers. Epidermal cells are tightly linked to each other and provide mechanical strength and protection to the plant.
The illustration (to the right) of Acacia suaveolens from Novae Hollandiae plantarum specimen shows the juvenile true leaves, together with the developing phyllodes, and the phyllodes of the mature plant. The genus, Daviesia, in the family Fabaceae, is characterised in part by the plants having phyllodes. [2] Phyllodes in Fabaceae
Palisade cells contain a high concentration of chloroplasts, particularly in the upper portion of the cell, making them the primary site of photosynthesis in the leaves of plants that contain them. Their vacuole also aids in this function: it is large and central, pushing the chloroplasts to the edge of the cell, maximising the absorption of ...