Margins forming a terminal angle between 45°–90°.
The final growth phase of the leaves. Adult leaves in e.g. eucalypts occur in mature trees or mallees. They are different from juvenile leaves in at least some of the characteristics such as colour, shape, size, and relationship to each other on the stem. In some eucalypts, adult leaves never or rarely form.
Roots that arise from above-ground stems and trunks, rather than the main axis of the root. E.g. aerial roots.
Fibrous adventitious roots above-ground stems and trunks. Aerial roots can be prominent and extensive on some pōhutukawa (Metrosideros excelsa) trees.
A secondary or subsidiary part of an organ; a special outgrowth.
Gradually tapering, drawn out.
The tissues, collectively outermost to the cambium of a woody plant.
A simple inflorescence ending in a vegetative (non-floral) bud in which the main axis bears lateral flowers; includes corymbs, racemes, spikes, and umbels. pl. botryia.
Modified, reduced leaf found in the inflorescence.
Small branches, or divisions of a branch, of trees and usually bearing the leaves; or of flowering branches as in inflorescences.
With the surface blistered or puckered.
Producing flowers and fruits on well-developed trunks or major branches. cf. ramiflorous.
Producing flowers and fruits on well-developed trunks or major branches. adj. cauliflorous. cf. ramiflory.
Paper-like in texture.
Of ± the same colour throughout or on both surfaces, such as in leaves when the upper leaf surface colour is the same as, or very similar to, the lower surface. cf. discolorous.
Cone-shaped, with the broad end at the base.
Young stems shooting from a stump, or the juvenile growth sprouting from mature trunks or branches.
Inflorescence with branches starting at different points but with flowers reaching about the same height. adj. corymbose.
Finely crenate along the margin. cf. denticulate.
Contraction of ‘cultivated variety’, a selection developed and maintained in cultivation, distinguished by characters significant for the purposes of agriculture, forestry or horticulture.
With sharp teeth perpendicular to the margins, such as those of a leaf blade (lamina); diminutive denticulate. cf. crenate.
Coloured differently on the two surfaces, such as in leaves when the upper leaf surface colour is markedly different to the lower surface. cf. concolorous.
Oval; shaped like a flattened circle, symmetric and broadest about the middle, e.g. a leaf shape; length:breadth ratio 2.5:1 to 3:2.
Lengthened, stretched out.
With a notch at the apex, usually broad and shallow and of leaves.
In flowering plants embryos form after the fertilization of a female reproductive (egg) cell by pollen.
Having a natural distribution restricted to a particular geographic region. For example, New Zealand endemic species are not found naturally in any other country. cf. indigenous.
One plant growing on another, using the host for anchorage, but without deriving nourishment from it (i.e. not parasitic). adj. epiphytic.
Not indigenous; introduced from another region or country by accident or design. In the case of New Zealand, usually from another country.
A formal group of one or more genera believed to be related phylogenetically, and morphologically separable from other botanical families. cf. genus.
A structure, within or on the surface of a plant, with a secretory function. adj. glandular. See oil glands.
With glands.
Blue-green in colour with a whitish bloom, e.g. the juvenile leaves of many eucalypts.
The general appearance of a plant, including size, shape and growth form.
The external environment in which plants live, e.g. coastal, indigenous forest, lowland.
Outgrowths from the epidermis, each consisting of a single row of cells; may be branched or unbranched.
Herb-like, not woody; usually green and soft in texture.
Plants that can possess juvenile and adult foliage, such as eucalypts.
Progeny resulting from the crossing of two parents with different genetic systems, usually of different species.
Naturally occurring in an area, but not necessarily confined to it. For example, New Zealand indigenous species can also occur naturally in other countries. cf. endemic.
Any surface covering, e.g. hairs, scales; a collective term for such coverings.
In the Myrtaceae, dead bark that is persistent, usually hard, thick, widely and deeply furrowed, and impregnated with reddish exudate (kino).
The first-formed leaves, especially when they differ from the adult leaves. In eucalypts, juvenile stems and leaves occur in young plants or in regrowth, e.g. after fire. They are often different in colour and proportions from adult growth.
Ridged like the bottom of a boat.
Shaped like the head of a lance or spear, broadest in the lower half and tapering to the tip, e.g. a leaf shape; narrowly ovate (sometimes, and incorrectly, used for narrowly elliptic); length:breadth 9:1 to 2.5:1. cf. oblanceolate.
A photosynthetic and transpiring organ usually green and borne on the stem of a plant; may be reduced or specialised.
Ending abruptly in a short sharp point (a mucro). Often refers to the leaf tip.
A small short sharp point (a mucro) on an obtuse apex.
An introduced plant now freely reproducing in well-established populations.
Heart-shaped in outline but attached at the narrower pointed end, e.g. a leaf shape. cf. cordate.
The reverse of lanceolate, with the widest part between the middle and the apex, e.g. a leaf shape. cf. lanceolate.
Longer than broad, with parallel margins and rounded ends, e.g. a leaf shape; length:breadth 2.5:1 to 3:2.
Shaped like an upside-down egg, longer than broad, broadest above the middle, rounded at both ends, e.g. a leaf shape; length:breadth 2.5:1 to 3:2.
Margins forming a terminal angle > 90°.
Oil dots; small or minute structures embedded in a leaf or other organ, secreting a volatile oil, mostly visible as small translucent dots (a hand lens is often needed) against a strong light; usually making the organ aromatic when crushed.
± round in outline, with length equal to width. adj. orbiculate.
Shaped like an egg, broadest below the middle, rounded at both ends, e.g. a leaf shape; length:breadth 2.5:1 to 3:2.
Specialised vertical roots produced by some vascular plants that grow in water; the roots contain spongy tissue which enable them to exchange gases with the atmosphere through lenticels in their aerial portions. Unusual in the Myrtaceae but found in Syzygium maire.
Lying flat on the ground.
Flowers and fruits produced behind the current foliage on woody branches formed in previous, but recent, seasons. cf. cauliflorous.
The production of flowers and fruits behind the current foliage on woody branches formed in previous, but recent, seasons. adj. ramiflorous. cf. cauliflory.
Curved outward or downward.
Rolled backwards (and thus often downwards), e.g. of the margins of a leaf.
Extrusive igneous rock with very high silica content.
Part of the underground axial system of a plant which does not bear leaves and tends to grow downwards or laterally in the soil. See also adventitious roots, aerial roots.
Of a surface when roughed by short protuberances. adj. scabrous; diminutive scaberulous, scabridulous.
Rough to touch.
Scaly, covered with small flakes.
The reproductive bodies formed from a fertilised ovule, consisting of a protective coat enclosing the embryo and food reserves.
The secondary veins of a leaf.
The basic unit of classification that usually refers to one or several groups of plants or other living organisms, which share common features and/or ancestry, and interbreed and maintain their distinctive identity through successive generations.
Stamens joined in a ring at their bases.
Dead bark that is persistent, long-fibred, thick, furrowed, and often interlaced beneath the surface.
A taxonomic category, in rank between species and variety. Abbreviated subsp. (referring to 1 subspecies) or subspp. (if referring to more than 1 subspecies).
1 of 2 or more names for the same taxon. Only 1 name is accepted under the International Code of Botanical Nomenclature.
The study of the principles and practices of classification, the establishing and defining of relationships; often used interchangeably with systematics, but strictly taxonomy is only part of systematics.
With colours or shapes arranged in squares to give a chequered appearance, e.g. of bark.
With a ± regularly incised margin.
A flower cluster (inflorescence) sometimes flat-topped, with pedicels arising from a common centre, often umbrella-shaped. adj. umbellate.
Having a wavy margin, such as a leaf.
Urn- or pitcher-shaped.
Striped or blotched with various colours, usually of leaves. Variegated leaf blades (lamina) are conspicuously marked with two or more colours, that may take the form of spots, mottling, lines, patches, etc. The term does not include features such as the veins or midribs of a leaf being a different colour.
A taxonomic category below that of species (and subspecies if both used); differentiates variable populations with minor morphological distinctions.
A plant growing out of place or where it is not wanted; often characterised by high seed production and their ability to colonise disturbed ground quickly.
An arrangement of three or more parts or organs at the same level round an axis. adj. whorled.