What is a ligule and example?
What is a ligule and example?
The ligule is part of the leaf that is found at the junction of the blade and sheath of the leaf. It may take several forms, but it is commonly some form of translucent membrane or a fringe of hairs. Some grasses do not have a ligule, for example barnyardgrass (Echinochloa crus-galli).
What does ligule mean?
Of the three component organs of the grass leaf – blade, sheath and ligule – the ligule is the least studied and the least understood. Traditionally, it has been assumed to act in a passive way in protecting the culm and leaves that it encloses from the entry of water, dust and harmful spores.
What is a ligule in plants?
Definition of ligule : a scalelike projection especially on a plant: such as. a : a thin appendage of a foliage leaf and especially of the sheath of a blade of grass. b : a ligulate corolla of a ray floret in a composite head.
What are Auricles on grass?
Definition: Used for identifying different types of grass, depending on the shape and presence. An auricle is typically a short claw-shaped, rounded, or pointed attachment at the base of a leaf blade, which tends to attach the lower part of the leaf to the stem of the leaf or blade.
What is a hairy ligule?
Auricles are finger-shaped projections or appendages, can be absent or present, large or small and may have hair. A ligule is a thin appendage on inner surface at junction of the leaf blade and stem. Ligules can be membranous, hairy or absent. A membranous ligule resembles cellophane (thin and translucent).
Do all grasses have ligules?
Ligules and Auricles None of the cool-season turfgrasses have ligules that appear as a fringe of hairs, but this feature is common on many weed grasses and most warm-season turfgrasses. Auricles are slender extensions of the collar and are located at the junction of the leaf blade and leaf sheath.
What is ligule mention its significance?
A ligule is the membraneous scale that is found at the inner junction or leaf sheath between the leaf and the stem of a grass plant (also found in sedges). It is one of the key parts of a grass plant to be able to identify its species and name. Some species have hairy projections as ligules.
What is ligule and auricle?
is that ligule is (botany) in many grasses (poaceae) and some sedges (cyperaceae), the membranous appendage or ring of hairs projecting from the inner side of a leaf at the junction between the blade and the sheath while auricle is (botany) any appendage in the shape of an earlobe.
Do Lycopodium have ligules?
lycophytes. …a leaf; this is the ligule, a peculiar tonguelike outgrowth from the leaf surface near the leaf base. Leaves of Lycopodium and Selaginella can be differentiated on this basis. The ligule, which appears very early in the development of a leaf, is a surprisingly complex structure at maturity.
What grasses have a hairy Ligule?
In general, cool- season grasses either have ligules too small to see, or membranous ligules and warm-season grasses (ber- mudagrass, zoysiagrass) have hairy ligules and hairs around the base of the leaf.
How do you identify quackgrass?
Identification: The most distinct identification feature of quackgrass is its clasping auricles. Quackgrass can be distinguished from annual ryegrass (Lolium multiflorum) with the presence of rhizomes (i.e. quackgrass has rhizomes and annual ryegrass does not).
What grasses have a hairy ligule?
