Glossary


Ob-
Prefix meaning inverted, in reverse direction.
Obcordate
Heart shaped with the notch at the apex.
Obcordate leaf shape Obcordate leaves of Melicytus crassifolius Obcordate leaves of Muehlenbeckia astonii
Oblanceolate
Tapering and widest towards the apex or inversely lanceolate.
Oblanceolate leaf shape Oblanceolate leaf of rewarewa
Oblique
Slanting; of a leaf, larger on one side of the midrib than the other, in other words asymmetrical.
An oblique leaf base An oblique leaf base of Griselinia lucida
Oblong
Rectangular.
Oblong leaf shape
Obovate
Roughly elliptical or reverse egg shaped and widdest near the apex (i.e., the terminal half broader than the basal half).
Obovate leaf shape Obovate leaf shape of Coprosma parviflora
Obtuse
Blunt or rounded at the apex, with the sides meeting at an angle greater than 90°.
An obtuse leaf tip
Operculate
With a small lid.
Opposite
A pair of organs attached at nodes in pairs on either side of a stem or axis.
Opposite leaves of hangehange
Orbicular
Almost or approximately circular.
Orbicular leaf shape
Outbreeding depression
A reduction in vigor of offspring from distant parents. It can occur when a locally adapted population is moved and mixed with plants adapted to different conditions.
Outer canopy deciduous
Marked reduction in leaf number in the outer canopy in exposed high light environments over winter.
Oval
Planar, shaped like a flattened circle, symmetrical about both the long and the short axis; about twice as long as broad, tapering equally both to the tip and the base. Synonymous with elliptical.
Oval leaf shape Oval leaf shape of Metrosideros robusta
Ovary
Part of a flower containing the ovules and later the seeds.
Ovary of Sophora
Ovate
Egg-shaped and widest at base.
Ovate leaf shape Ovate leaf shape of Coprosma rhamnoides
Ovoid
Oval; egg–shaped, with rounded base and apex.
Egg shaped fruit of taraire

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