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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 leaf pair can be thought of as a whorl of two leaves. With an alternate (spiral) pattern, each leaf arises at a different point (node) on the stem. Distichous leaf arrangement in Clivia
2. Arranged on opposite sides, e.g. leaves on a stem; Compare distichous and opposite. 3. Bilaterally symmetrical, as in a leaf with a symmetrical outline. biloculate Having two loculi, e.g. in anther s or ovaries. binomial Making use of names consisting of two words to form the scientific name (or combination) in a Latin form.
The arrangement of leaves on the stem is known as phyllotaxis. [20] A large variety of phyllotactic patterns occur in nature: The leaves on this plant are arranged in pairs opposite one another, with successive pairs at right angles to each other (decussate) along the red stem. Note the developing buds in the axils of these leaves.
Leaves and flowers of Clinopodium douglasii.. Clinopodium douglasii is a decumbent perennial herb.Leaves are in an opposite arrangement along the stem, and each leaf is subtended by a petiole, is relatively small in size, and ovate to almost triangular in shape, with the leaf margin being shallowly toothed.
The leaves generally have an opposite arrangement, but sometimes are whorled or alternate. They are simple with smooth margins and pinnate venation. [4] Stipules are typically reduced, appearing as a row of minute hairs, [4] or absent. [5]
The concolorous, glossy green adult leaves have an opposite to sub-opposite arrangement. The leaves are supported on petioles which are 0.5 to 1.7 centimetres (0.2 to 0.7 in) long. The leaf blade has a narrowly lanceolate to lanceolate shape and is 5.5 to 19.5 centimetres (2 to 8 in) in length and are 0.5 to 1.8 centimetres (0 to 1 in) wide ...
The tree may grow up to 51 m (167 ft) tall and 80 cm (31 in) diameter at breast height, with cracked and fissured bark.The stems produce whitish-yellowish latex.The leaves have an opposite arrangement, are simple, elliptic and a glossy rich green.
Acephala means "no head" [12] as the plants have leaves with no central head; the opposite arrangement of white cabbage, or Savoy cabbage. Each cultivar has a different genome owing to mutation, [13] evolution, ecological niche, [14] and intentional plant-breeding by humans. Mabberley (1997, p. 120) has the Acephala group in three sub-groups ...