lodicule


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lodicule

[′läd·ə‚kyül]
(botany)
One of the minute membranous bodies found at the base of the carpel in most flowering grasses; usually occurs in pairs.
References in periodicals archive ?
The posterior lodicule may not have been essential to this operation at certain stages of grass evolution, and its development therefore may not have been maintained.
Lanceolate, membranous-tipped, non- or weakly vascularized lodicules are both plesiomorphic and common in Pooideae, and the three-lodicule state is present among early-diverging lineages of the Pooideae (Stipeae and Ampelodesmos), while these lodicule characters (except the infrequent occurrence of weak vascularization) are rare or absent among Arundinoids.
Reporting and application of lodicule characters 17 and 18 by W&D is inconsistent with the literature and available illustrations for our taxa (e.
15: Lodicule number: 2 = two; 3 = three; 4 = four; 5 = five; 6 = six.
18: Lodicule vascularization: 0 = very faint to absent; 1 = prominent.
lodicules, embryos) and taxonomic monographs; secondary sources include floras and prior reviews of structural variation and taxonomy of the grasses.
In grasses it is a matter of convenience and tradition to identify as a spikelet the combination of one or more florets (each comprising a lemma, palea, lodicules, stamens, and pistil, or in certain grasses one or more of these parts absent) with two proximally situated bracts, the glumes (sometimes one or both absent).
The presence of a palea that subtends the flower and lodicules, these together subtended by a sheathlike bract called a lemma, is the rule in the grasses.
Although such characteristic grass features as spikelets and lodicules may not have been present in the earliest grasses (see above), the grass-type fruit, with a lateral and well-developed embryo (char.
Mutations in the si1 locus result in the conversion of lodicules into lemma/palea.