Tapering to a distinct but not protracted point, with more or less straight sides forming an angle of less than 90 degrees.
In the form of a ring.
Directed forward or upward. Most commonly used here with for hairs that are bent towards the apex of branchlets or phyllodes. Compare Retrorse.
Without leaves or phyllodes.
Tipped by a short, slender, flexible and often sharp point.
Pressed close or flat against another organ.
Bearing long, cobwebby, entangled hairs.
A small, well-defined area on a surface. Used here mainly to describe the area on the seed surface circumscribed by the pleurogram.
Bearing an awn or bristle at the tip.
Jointed; having joints where separation may occur naturally.
Growing upwards, with an angle of divergence of 16-45 degrees.
Tapering gradually to a narrow tip or base.
One or more bracts located at base of raceme axis. These bracts enclose inflorescence buds; they are not common in Acacia. When present basal raceme bracts may be conspicuous but they commonly fall away as the racemes elongate (in which case their presence can be inferred by bract scars at the extreme base of the raceme axis: observe at x10 magnification). Not to be confused with Basal peduncular bracts.
Deeply two-cleft or two-lobed, usually from the tip.
Borne in pairs.
Falling off early. Compare Deciduous.
A collective term for all the sepals of a flower.
Grey or white in colour due to a covering of short, fine hairs.
Pertaining to fruits.
Tough and firm but elastic and flexible, like cartilage.
Chestnut-coloured; dark reddish brown.
With a papery texture.
With a marginal fringe of hairs. Dim. Ciliolate.
Lemon yellow colour.
A group of individuals originating from a single parent plant by vegetative reproduction.
As used here the term is applied to narrow, “thick” organs, especially phyllodes, which are subjectively judged as being intermediate between Flat and Sub-terete.
Of one colour. Use here for when the upper and lower surfaces of leaflets are uniform in colour and shade of colour.
Fusion of like parts, as the fusion of staminal filaments into a tube.
Twisted or bent.
New growth arising from a stump.
Heart-shaped, with a notch at the base.
With a leathery texture.
The collective name for all the petals of a flower.
With a hard, brittle texture.
Hooded or hood-shaped.
Having the shape of a knife-blade.
Cup-shaped; nearly hemispherical, like an acorn-cup.
When an organ is continuously bent into an arc (but the ends not overlapping
A short, sharp point.
Tipped with a short, sharp point.
Cylinder-shaped; elongate (more than twice as long as wide) and round in cross-section. See also Spike.
Spreading horizontally (of the reclining on the ground) but with the tips growing upwards.
Bent abruptly downward.
The opening at maturity of pods.
Having three sides and three angles, with the widest axis below the middle; length: width ratio about 1: 1. A 2-dimensional shape. See Triangular.
Sunk down, as if flattened from above.
Widely or loosely spreading.
With two forms.
In the form of a disk.
Resembling a disk.
Of different colours. Use here for when the upper and lower surfaces of leaflets are unlike in colour (commonly different shades of green).
When similar parts are not closely aggregated, as in longitudinal nerves of plurinerved phyllodes that are widely spaced.
Widely diverging or spreading apart.
Having structurally different upper and lower surfaces.
Covered with soft, fine hairs.
With small prickles or spines.
Pertaining to soil.
With a notch at the apex.
Peculiar to a specific geographic area.
Growing upwards, with an angle of divergence of less than 16 degrees.
The margin irregularly toothed, as if gnawed.
Projecting beyond the surrounding parts, as bracteoles protruding beyond flower buds.
Sickle-shaped or scimitar-shaped. A term of varied application but as used here refers to phyllodes which are generally broadest near the middle, recurved, narrowed towards the apex and usually also the base. The upper margin of the phyllode is clearly convex and the lower margin clearly concave. See Sub-falcate.
Clustered from a common point. As used here phyllodes are considered fasciculate if 2 or more arise from a single point on the branchlet.
Containing or resembling fibre.
Fringed with minute hairs along the margin.
Split or cracked (used with reference to bark).
Thick and pulpy; succulent.
Leaf-like; bearing leaves.
sooty, or soot-coloured.
Spindle-shaped; broadest near the middle and tapered towards both ends.
Having the pepals united by their margins, at least at the base.
Having the sepals united by their margins, at least at the base.
In equal pairs like twins.
Swollen or enlarged on one side; a pouch-like enlargement of the base of an organ. Same as Gibbous.
The environmental circumstances or kind of place where an organism occurs.
Hearing coarse, long hairs.
Translucent, almost like clear glass.
Overlapping like tiles or shingles on a roof.
Curved upwards or inwards. For phyllode shape sometimes a subjective distinction is made between shallowly and strongly incurved, and between straight and shallowly incurved. See also Curved and Recurved. The term incurved is also used for leaflets where the margins are curved inwards towards the upper side of the leaflet (rare in Acacia)
Not opening at maturity along definite lines or pores.
A covering of hairs.
Bent abruptly inwards or upwards.
Harmless; without a sharp point.
Used here with reference to Glands that are situated on upper surface of the rachis between successive pairs of pinnae, but located more than 1 mm below the insertion of the pinnae. One to several interjugary glands may be present; they may vary in size but are generally smaller than the jugary glands (which may co-occur on the same leaf).
The portion of a branchlet between adjacent nodes.
A space between. Used here mainly with reference to the space between adjacent longitudinal nerves of plurinerved phyllodes.
A ring of bracts subtending a flower or flower cluster. In Acacia involucres are found only in members of the former subg. Acacia (Vachellia). The involucre may occur anywhere along the peduncle, from the base to the apex; in the latter case it may be hidden by the flowers when heads or spikes are at anthesis.
Wooly; densely covered with long, soft tangled hairs.
Lance-shaped. A term of varied application but as used here refers to a shape that is longer than wide with the broadest point below the middle, and with ± curved sides. Length to width ratio more than 3: 1 A 2-dimensional shape. If length: width ratio is less than 3 then see Ovate.
Borne on or at the side.
Somewhat corky spots on the bark (these are small, pale-coloured and can be circular, lens-shaped or slit-like).
Invested with lenticels.
Triangular but with length: width ratio 12: 1 or more. A 2-dimensional shape.
Farinaceous; powdery, dry and crumbly.
Thin, soft, flexible, and more or less translucent, like a membrane.
The number of parts within a set. Here used with reference to flowers, for example, 5-merous flowers have 5 petals and 5 sepals.
Bark reddish and shedding in short, narrow shavings which curl back on themselves from each end and which remain attached to the stems for some time. While the colour of Minni Ritchi bark always has a reddish hue it may, depending upon the species, vary from deep red or purplish to coppery orange or salmon pink. With age the outer layers of bark often turn grey and in some species this may persist as a stocking around the base of stems or as patches along branches.
With coloured spots or blotches.
A small point (usually brown, hard and sometimes sharp), found at tips of most phyllodes.
With 4 or more trunks or stems arising from ground level.
When used with reference to phyllodes - possessing many, fine, close, parallel nerves.
Plants introduced from elsewhere, but now established.
The arrangement of nerves or veins in an organ, as in phyllodes.
A strand of vascular tissue. Used here mostly in reference to the veins found on phyllodes.
Cone-shape, with the attachment at the narrower end.
Spheroidal and flattened at the poles.
A short cylinder (not above twice as long as wide). Used here with reference to the shape of flower-heads. Same as Oblongoid. See Heads.
Circular. Length to width ratio 1: 1.
An opening or pore; usually used here with reference to the Glands (extra-floral nectaries) that have an opening located in the centre.
Egg-shaped in outline and attached at the broad end. Length: width ratio about 2. A 2-dimensional shape. If length: width ration is more than 3 then see Lanceolate.
An immature seed; the megasporangium and surrounding integuments of a seed plant.
Small, elongated protuberances on the surface of an organ, usually an extension of one epidermal cell. Plural: Papillae.
Target-shaped; a flat structure borne on a stalk which is attached to the lower surface rather than to the base or margin.
With parts arranged in sets or multiples of five, as in flowers having 5 sepals.
Remaining attached to the plant beyond the expected time of falling.
Abbreviated from phenomenology, recording the periodical phenomena of plants. As used here the term applies to the appearance of flowers and fruits.
A modified primary leaf axis which assumes the form and function of a leaf. A majority of Australian Acacia species possess phyllodes.
Having the form of a cap.
Covered with usually long and spreading, soft, weak, thin and clearly separated hairs.
In bipinnate-leaved acacias the pinna represents one of the primary divisions of the leaf (they comprise the rachilla together with the leaflets it supports). Pinna are inserted on the petiole and (when present) the rachis, occurring as an opposite pair of pinnae, however, sometimes they are sub-opposite or alternate. Plural: Pinnae.
With a flat surface.
Folded back and forth longitudinally like a fan.
The fruit of Acacia, containing the seeds. (A usually dry, dehiscent fruit derived from one carpel that splits along two sutures.). Same as Legume.
Short, sharp-pointed, hardened outgrowths of the epidermis, with no vascular tissue connecting them to the branchlet.
Trailing or spreading along the ground but not rooting at the nodes.
Classically defined as the swollen base of the petiole; in Acacia the term is also applied to phyllodes. The pulvinus is present in very many acacias but is not always overly pronounced. It is commonly yellowish and (at least when dry) transversely wrinkled, but is not always swollen, and is normally separated from the branch by a joint.
Marked with dots, depressions or translucent glands.
Used in Acacia to describe prominent foliar glands that have relatively large orifices and well-defined rims that project beyond the margin, e.g. Acacia pustula.
With small blisters.
Four-cornered; having four angles, which are usually right angles.
Inflorescences comprising Racemes.
Curved downwards or outwards. For phyllode shape sometimes a subjective distinction is made here between shallowly and strongly recurved, and between straight and shallowly recurved. See also Curved and Incurved. The term recurved is also used for leaflets where the margins are curved backwards towards the underside or the leaflet. See also Revolute.
Bent backward or downward to some degree.
Bearing resin. Resin is a term applied to a group of oxydised hydrocarbons, solidified or hardened turpentine, and insoluble in water. Resin may or may not be sticky (i.e. viscid).
With margins rolled backward towards the underside. See also Recurved.
Stiff and inflexible.
Having a small, terminal beak.
Forming a smooth arc, like an arc of a circle. Like Obtuse except arc forming a wider angle.
Imperfectly developed (as applied here this term refers to structures, commonly phyllodes or racemes, that are extremely short).
Thin-textured and dry, not green.
A segment of the calyx. In Acacia sepals may be free (in which case they are often difficult to see) or united into a variously lobed cup.
Sitting upon the body that supports it, without a supporting stalk.
Curving in and out in a wavy or serpentine form. Same as Serpentenous.
With minute squamellae, i.e. small scales.
Star-shaped, as in hairs with several to many branches radiating from the base.
Infertile. Used here mainly with reference to plants bearing neither flowers nor fruits.
A pore or aperture in the epidermis, surrounded by two guard cells, which allows gaseous exchange.
Marked with fine parallel lines, as grooves or ridges.
A prefix denoting slightly, somewhat, or almost.
Hairs very sparse, almost absent.
Growing together in the same geographic area.
Slowly. Used here for pods that do not readily dehisce.
With a checkered pattern; usually refers to bark.
With parts arranged in sets of multiples of four, as in flowers having 4 sepals.
Densely covered with matted, short hairs.
Terminating very abruptly at the apex or base, as if cut-off square.
Bearing tubercles (i.e. small wart-like structures on the surface).
Swollen or inflated.
To turn in another direction so that parts are situated in a spiral curve.
Hooked at the tip.
The opposite segments of dehiscent fruit which separate from one another at maturity. Used with reference to pods in Acacia.
A vein of secondary importance.
Shiny as though varnished.
Covered with minute wart-like elevations.
A structure which is very reduced.
A thin, flat margin bordering a structure.
Approaching the texture of wood.