What is Distichous phyllotaxy?
Phyllotaxy is the arrangement of leaves and flowers around the stem of a plant (Kuhlemeier 2017). A distichous phyllotaxy, the opposite (180°) and alternate arrangement of leaves, is the primary phyllotactic pattern in grass plants (Jean 1994).
What is a Distichous leaf?
distichous. / (ˈdɪstɪkəs) / adjective. (of leaves) arranged in two vertical rows on opposite sides of the stem.
What is spiral arrangement?
The basic arrangements of leaves on a stem are opposite and alternate (also known as spiral). Leaves may also be whorled if several leaves arise, or appear to arise, from the same level (at the same node) on a stem.
What is the pattern of leaves?
The arrangement of veins in a leaf is called the venation pattern; monocots have parallel venation, while dicots have reticulate venation. The arrangement of leaves on a stem is known as phyllotaxy; leaves can be classified as either alternate, spiral, opposite, or whorled.
Why is phyllotaxy a good way to describe plant habit?
The function of the arrangement of leaves (phyllotaxy) is to increase a plant’s ability to carry on photosynthesis by positioning the leaves in such away as tomaximize the surface area available to intercept sunlight. Leaves may be either caulescent (on obvious stems) or acaulescent (with no obvious stems).
What is the meaning of Distichous?
: disposed in two vertical rows distichous leaves.
What is Distichous condition?
Distichous phyllotaxy is also called as 1/2 phyllotaxy. In this type, the third leaf falls above the first and the fourth leaf base falls above the second and so on. It is seen in grasses.
What is spiral pattern in nature?
Spirals. A spiral is a curved pattern that focuses on a center point and a series of circular shapes that revolve around it. Examples of spirals are pine cones, pineapples, hurricanes. The reason for why plants use a spiral form like the leaf picture above is because they are constantly trying to grow but stay secure.
What is meant by Circinate Vernation?
Circinate vernation is the manner in which a fern frond emerges. As the fern frond is formed, it is tightly curled so that the tender growing tip of the frond (and each subdivision of the frond) is protected within a coil.
What is the pattern of the Gumamela leaves?
The gumamela is a fast-growing evergreen shrub with dark green and glossy leaves with dicot flowers. The leaves are oval in shape, and they measure between 3 inches to 4.2 inches long. The edges of the leaves often are slightly serrated. They arrange themselves in a spiral pattern and alternate around a long stalk.