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The following terms are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a single leaf blade or lamina) or compound (with several leaflets ). The edge of the leaf may be regular or irregular, may be smooth or bearing hair, bristles or spines.
Petioles usually attach at to the margin (edge) of the blade along the base, but in peltate leaves, the petiole is attached underneath the blade (Figure \(\PageIndex{3}\)). Leaves that do not have a petiole and are directly attached to the plant stem are called sessile (apetiolate) leaves (Figure
Nov 26, 2013 · Arabidopsis and other model plants that normally produce conventional bifacial leaves also can produce peltate leaves as a result of mutations that impair adaxial–abaxial patterning (summarized in Table 1, often referred to as “lotus” or “trumpet” leaves in the original reports).
Peltate – Leaves rounded with petiole attached under the leaf base. Reniform – Leaves wider than they are high. Spatulate – Generally narrow leaves widening to a rounded shape at the tip. Shape of Leaf or Leaflet Apex . The shape of the leaf apex (tip) and base is another tool in plant identification. Figures 4and 5
Apr 2, 2021 · Peltate- or umbrella- shaped leaves are characterised by a petiole more or less centrally attached to the lamina on the abaxial side. The transition from the petiole to lamina in peltate leaves resembles a significant and abrupt geometrical change from a beam to a plate in a very compact shape.
Mar 25, 2005 · Peltate leaves are unifacial leaves with a circular petiole and a bifacial blade. This article shows that peltate leaf structure in Tropaeolum majus is associated with altered expression of a YABBY gene, TmFIL, that regulates adaxial-abaxial polarity.
Peltate: Having a centrally attached stalk or petiole like an umbrella.*. The leaf stalk of mayapples (Podophyllum peltatum) is attached in the middle of the leaf, rather than at the leaf margin. Some other plants with peltate leaves are water lotus (Nelumbo) and nasturtium (Tropaeolum). *Pell, S.K., Angell, B. (2016).
