labellum


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labellum

[lə′bel·əm]
(botany)
The median membrane of the corolla of an orchid often differing in size and morphology from the other two petals.
(invertebrate zoology)
A prolongation of the labrum in certain beetles and true bugs.
In Diptera, either of a pair of sensitive fleshy lobes consisting of the expanded end of the labium.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Other than that, they differ in labellum and also anther crest of the flower (examination and observation have been made using USB digital microscope).
A: part of leafy shoot; B: rhizome and stilt root; C: head of inforescence and fower; D: labellum; E: bract; F: side lobe; G: infructescence; H: fruit [Drawing by Meekiong K.].
Flowers resupinate, horizontal, tubular-campanulate, odorless, dull white overall, sepals and petals with one and two longitudinal, greenish-brown veins, respectively, labellum with bright green to lemon yellow throat and brownish basal channel.
lanuginose), the narrow labellum throat with vertical sides, and proportionately longer, narrower labellum and especially the distal labellum lobe.
There are also three petals but one has been greatly modified into a lip or labellum, which is an extremely complex structure and quite different from the other two sepals (Soon, 1989).
This orchid group is therefore interesting to study quantitatively by describing the shapes of the sepals, petals and labellum of the flower.
The central sepal is modified into the labellum, which has light and dark fringing on the end, a yellow interior, and dark and light pink stripes deep inside.
Once a bumble bee has entered a flower through the labellum slit, the infolded margins ensure that the sole exit point lies upward, at the labellum base.
Five of the morphological traits were labellum width and length, flower height, stalk length, and the length of the longest leaf.
This is a bi-coloured species with reddish-purple sepals and petals, and a golden yellow labellum.
andrewsiae, from which it can be distinguished by the larger flowers (> 25 mm diameter with a labellum 11-12 mm long vs.