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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 ...
During the year, the plant grows about 30 cm (12 in) and produces 6-7 leaves. Its single leaves, usually arrow-shaped, are up to 30 cm (12 in) long. In the wild, the leaves are dark green and without variegation. Cultivated varieties have leaves in various shades of green, often light green and usually with different types of lighter tannins.
Leaf whorls on a herbaceous Lilium michiganense Leaf whorls on a woody tree, Brabejum stellatifolium In botany, a whorl or verticil is a whorled arrangement of leaves , sepals , petals , stamens , or carpels that radiate from a single point and surround or wrap around the stem or stalk.
The lobed leaves come from the base of the plant, while the unlobed leaves come from the top of the plant. There is variation among the parts of a mature plant resulting from the relative position where the organ is produced. For example, along a new branch the leaves may vary in a consistent pattern along the branch.
Bulbs are a combination of stem and leaves so may better be considered as leaves because the leaves make up the greater part. Caespitose: When stems grow in a tangled mass or clump or in low growing mats. Cladode (including phylloclade): A flattened stem that appears leaf-like and is specialized for photosynthesis, [4] e.g. cactus pads.
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.
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The simple leaves are alternate and cordate, membranous, growing on leaf stalks. There are no stipules. The flowers grow in the leaf axils. They are inflated and globose at the base, continuing as a long perianth tube, ending in a tongue-shaped, brightly colored lobe. There is no corolla. The calyx is one to three whorled, and three to six toothed.