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A straplike structure, such as the long flattened lobe of the corolla of a ray flower or a membranous or hairy appendage between the sheath and blade of a grass leaf.

[Latin ligula, diminutive of lingua, tongue; see dn̥ghū- in Indo-European roots.]


(ˈlɪɡjuːl) or


1. (Botany) a membranous outgrowth at the junction between the leaf blade and sheath in many grasses and sedges
2. (Botany) a strap-shaped corolla, such as that of a ray floret in the daisy
[C19: via French, from Latin ligula strap, variant of lingula, from lingua tongue]


(ˈlɪg yul)

1. a thin, membranous outgrowth from the base of the blade of most grasses.
2. a strap-shaped corolla, as in the ray flowers of certain composite plants.
[1595–1605; < Latin ligula]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ligule - (botany) any appendage to a plant that is shaped like a strapligule - (botany) any appendage to a plant that is shaped like a strap
phytology, botany - the branch of biology that studies plants
plant part, plant structure - any part of a plant or fungus
References in periodicals archive ?
2014), rice microsporogenesis can be identified based on the distance between the flag leaf ligule and the penultimate leaf ligule.
The diameter was measured at the mid-point of its length, which in turn was measured from soil level to the leaf +1 ligule.
The middle third of the first fully expanded leaf, with a visible ligule, was measured (from top to bottom) in each experimental plot.
Measurements of plant height (PH) were taken from the soil surface to the ligule of the last fully expanded leaf, starting at 7 DAS and repeated at seven-day intervals until the appearance of the flag leaf.
Species similar to Psittacanthus lasianthus, from which it differs by the sympodial, densely puberulous, three-angled stems, ternate leaves, terminal dichasia, perfoliate bracts, a neck-bearing, not inflated corolla densely laciniate on its outer surface and a triangular, ligule on the inside of each petal, a ring-like nectary, and a micropapillose stigma versus percurrent, glabrous, circular stems, paired leaves, axillary dichasia, not perfoliate bracts, a neck-lacking, inflated corolla without laciniae on its outer surface and a finger-like ligule on the inside of each petal, a 4-lobed nectary, and a smooth stigma in P.
Monocarpic perennial lifecycle, lignified culms, branching nodes, pseudopetiolate leaves, and an outer ligule are characters worth mentioning for the woody bamboos (GPWG, 2001; BPG, 2012); whereas herbaceous bamboos are pluricarpic, usually unbranched, with quite weak culms and an inner ligule (Judziewicz et al.
6 cm, not basally constricted, linear, usually conduplicate, pubescent on both surfaces, rarely glabrous, margins scabrous towards the apex, acute apex; ligule 0.
Size of ligule has a direct effect on number of floral visitors arriving to floral capitula of this species (Figueroa-Castro, 2001).
Ligule pit apertures are clearly visible on Bothrodendron stems, thereby distinguishing them from the superficially similar stems Cyclostigma and Pinakodendron, in which they are never seen.
Leaves generally have well-developed blades, but are reduced to lobes in some species; there also may be a ligule.