What is the arrangement of leaves in Equisetum called?
What is the leaf arrangement of the Equisetum sp. (Horsetails)? More than two leaves per node are present so the leaf arrangement is whorled.
What type of leaves does Equisetum have?
The leaves of horsetails are arranged in whorls fused into nodal sheaths. The stems are usually green and photosynthetic, and are distinctive in being hollow, jointed and ridged (with sometimes 3 but usually 6–40 ridges). There may or may not be whorls of branches at the nodes.
What are Equisetum leaves?
Equisetum leaves grow in whorls with multiple leaves growing from the same point around the stem and their branches also grow in the same fashion. Some species have tiny scale-like leaves and often appear leafless, whilst other species have long, slender leaves and give the plant a feathery appearance.May 23, 2015
How are the leaves arranged on the stem of Equisetum?
Stems are conspicuously jointed, where small, dark, triangular scale-like leaves are arranged in a ring around each joint. It forms both fertile and infertile shoots. This plant reproduces by means of a spore-bearing cone that forms at the tip of fertile stems.
What is the leaf arrangement of the Equisetum?
The leaves of horsetails are arranged in whorls fused into nodal sheaths. The stems are usually green and photosynthetic, and are distinctive in being hollow, jointed and ridged (with sometimes 3 but usually 6–40 ridges). There may or may not be whorls of branches at the nodes.
What is Equisetum stem?
Stem: The stem of Equisetum has two parts: perennial, underground, much-branched rhizome and an erect, usually annual aerial shoot. The branching is monopodial, shoots are differentiated into nodes and internodes.
Is the plant body of Equisetum haploid or diploid?
Background and Aims The genus Equisetum is cytologically uniform, having a base chromosome number of x = 108. All previously known species and hybrids that have been counted represent diploids with a sporophytic chromosome number of 2n = 216.
Where are the leaves of Equisetum?
This genus consists of perennial herbs that have jointed stems with a whorl of small, dark-colored leaves at each joint (some species have leaves with white margins). The leaves are joined at the base to form a ring around the stem.
Where are the leaves on horsetails?
Horsetails have segmented stems with extremely reduced leaves typically appearing non-existent. When present, the leaves grow in whorls radiating from the node sheaths of the jointed stem, resembling spokes of a bicycle wheel.
Are there any leaves on the horsetails?
Much of the horsetail we see consists of branchless stems. However, branched stems are fairly common also. One thing you will notice about horsetail is that it does not appear to have leaves. Leaves are present but they are reduced to small scales.
What is the structure of Equisetum?
The plant body of Equisetum has an aerial part and an underground rhizome part. The rhizome is perennial, horizontal, branched and creeping in nature. The aerial part is herbaceous and usually annual. Majority of the species are small with a size range in between 15 and 60 cm in height and 2.0 cm in diameter.