midrib


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midrib

[′mid‚rib]
(botany)
The large central vein of a leaf.
References in periodicals archive ?
With this kind of problem from our coconut farmers, the researcher decided to produce and evaluate a charcoal made from the neglected coconut leaf midrib.
petiole 7-23 mm long, smaller than the rachis; 1 extrafloral nectary, green-vinaceous, sessile, pyramidal, 1-3 mm long, located on the rachis, between the proximal pair of leaflets; rachis 13-15 mm long; leaflets discolorous, 2 pairs, semisucculent, adaxial surface pilose, abaxial surface tomentose, obovate to elliptic, 21-88 X 9-41 mm, apex rounded, base assimetric, venation penninervous, midrib excentric.
The hair density on lamina, midrib and leaf vein of 5 plants were randomly selected in each genotypes within each replications , total 5 leaves (the leaves were observed in such a way that one fully expanded leaf from the upper part of the first plant; second one from the middle part of the second plant and the third one from the lower part of the third plant of each variety and so on) and their hair-density noted under a stereo microscope, which was converted in to (cm2) with a simple multiplication.
These non-destructive techniques were the hemispherical images with CI-110[R] and the metric method based on the midrib length of all leaves in a single plant.
Moreover, the smaller worker brood cell depth, bee space and midrib to midrib distance requirement of A.
5 cm wide; its principal lateral veins are only 7-9(11) on each side of the midrib, moderately raised below and flat or raised (not sunken) above in dried leaves; it has several obvious, well-defined abaxial glands at the base and many others scattered throughout the length of the lamina; the petiole often bears a small bulbous gland beside one or both stipules and a pair of impressed glands between middle and apex; and the inflorescences are mostly borne in the axils of current leaves.
WPCs filled with pretreated and untreated particles of three wood species and date palm midrib fronds were manufactured, and their physical, mechanical, and dimensional stability properties were evaluated.
Furthermore, the fuel wood consumption would be higher for curing this woody midrib of NRV and the cost of production will be increased.
It was observed that the rate of drying the midribs is slower than the laminas therefore the midribs were separated from the laminas.