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- acute
- ending in a sharp point (shape); with an angle more than 60 degrees to the midrib (side veins)
- adnate
- fused to another organ; when the anthers are rigidly not pivotally held at the summit of the filament
- adult
- the final growth phase of the leaves
- alternate
- when the leaves are scattered on the stem and not opposite
- amplexicaul
- stem-clasping; when the sides of the base of the sessile leaf continue to the opposite side of the stem and overlap with the base of an opposite leaf if present
- annular
- ring-like; when the disc of the fruit is prominent, flat or raised and free of the valves
- anther
- the pollen-bearing organ at the tip of the stamen
- apiculate
- ending abruptly in a short point
- ascending
- when the disc is convex or raised between the staminophore and the valves
- axil
- the upper angle between the leaf and the stem
- axillary
- referring to the location of a plant organ in an axil, for example, the inflorescence
- axis
- stem, or the central pillar of tissue in the ovary that bears the placentae
- basifixed
- when the summit of the filament is attached to the base of the connective of the anther
- beaked
- when the operculum is markedly or slightly contracted to form a beak
- box-bark
- dead bark that is persistent, short-fibred, firm, often breaking into a tessellated pattern, often also partly deciduous and bleached
- campanulate
- bell-shaped; of the fruit, but seen upside-down
- chamber
- a division of the ovary containing the ovules
- clavate
- club-shaped; of the buds, distinctly pedicellate and widening towards the top
- compacted
- when the dead bark is persistent and compact with narrow fissures, usually kino impregnated
- compound
- when the inflorescence is branched and simply
- concolorous
- when the leaves are the same colour on both sides
- confluent
- when the slits formed in dehiscence of the anther join in a single crescent-shaped opening
- connate
- when the bases of opposite leaves are joined around the stem
- coppice
- young stems shooting from a stump or the juvenile growth sprouting from mature trunks or branches
- cordate
- heart-shaped, refers particularly to the indented base of the leaf
- cotyledon
- one of the first pair of leaves in an embryo, seen following germination
- crenulate
- with a scalloped edge
- crown
- the leafy head of a tree
- cuboid
- resembling a cube
- cuneate
- wedge-shaped
- cupular
- cup-shaped
- deciduous
- of the leaves or bark, shed yearly or at the end of a recurring growth period
- decorticate
- of the bark, shed yearly or at the end of a recurring growth period
- dehiscence
- of the eucalypt flower bud, when the operculum sheds, of the anther, when the lobes open and shed the pollen; of the fruit, when the capsule splits and sheds the seed
- deltoid
- triangular or D-shaped
- denticulate
- toothed along the margin
- descending
- when the disc lines the upper tubular part of the hypanthium or slopes downwards towards the valves
- diamond-shaped
- rhomboidal or ovoid and angular
- disc
- the tissue in the bud or fruit between the staminophore and the top of the ovary
- discolorous
- when the leaf surfaces differ in colour
- dorsal
- top-side, back-side
- dorsifixed
- when the summit of the filament is attached to the connective of the anthers on the back-side, i.e. the side away from the centre of the flower when the stamen is erect
- elliptical
- shaped like an ellipse but often pointed at one or both ends
- emarginate
- of the leaves, notched at the end
- endemic
- when the natural distribution of a species is restricted to a certain defined area
- entire
- when the edges of the leaves are smooth, i.e. unrelieved by crenulations, teeth, indentations etc.
- falcate
- curved like the blade of a sickle
- fertilisation
- when the male nucleus of the pollen unites with the female nucleus of the ovule
- fibrous
- when the bark is non-decorticating and is held in short or long fibres, usually dense, but often held loosely on old branches or towards base of trunk
- filament
- the stalk of a stamen, bearing the anther at the tip
- fruit
- the final reproductive organ in a plant; in a eucalypt a composite structure of the seed-bearing capsule held with in a woody hypanthium, opening at the top where the seed are shed after dehiscence
- fusiform
- spindle-shaped, cigar-shaped
- genus
- a unit of classification in living organisms comprising one or many related species
- glabrous
- smooth, without hairs
- gland
- in eucalypts, small or minute oil containing structures seen near the surface of the young stems, leaves, buds and fruits; also near or at the top of the connective of the anther; or in the path of the branchlets
- glaucous
- bluish green, bluish grey or covered with a white wax on the surface
- globoid
- of the anthers, somewhat globular in form
- globose
- of the fruit, somewhat globular in form
- habit
- the general appearance or characteristic growth form of a plant
- habitat
- the external environment in which a plant lives
- hilum
- the scar on the seed indicating its point of attachment to the placenta
- hybrid
- the progeny resulting from the crossing of two unrelated parents, usually of different species
- hypanthium
- an enlarged receptacle in eucalypts the broadened invaginated structure at the top of the pedicel partly or wholly enclosing the ovary
- inflexion
- of the stamens in bud, when they are at first erect then down-turned
- inflorescence
- the arrangement of flowers on an axis, may be simple or compound
- insect scar
- the horizontal, usually black scars on the bark of some eucalypts caused by burrowing insect larvae
- intermediate
- the growth phase of the leaves between the juvenile and the adult
- internode
- the part of the stem between leaf bases
- intersectional
- when the leaf oil glands occur at the intersections of the veinlets or touches them
- intramarginal vein
- the first prominent vein of a leaf in from the edge and running more or less parallel with it
- ironbark
- dead bark that is persistent, usually hard, thick, widely and deeply furrowed, and impregnated with no kino)
- island (glands)
- when the leaf oil glands occur within the smallest unreticulated areas (areole)
- juvenile
- the growth phase of the leaves between the seedling and the intermediate
- kino
- a dark gum exudate that often impregnates the dead bark
- lacunose
- with small hollows or cavities on the surface
- lamina
- leaf blade
- lanceolate
- lance-shaped, broader towards the base and tapering to a point
- lignotuber
- a woody tuber developed in the axils of the cotyledons and the first few leaf pairs becoming massive in mature trees or mallees
- linear
- very narrow in relation to its length, usually with parallel sides
- locule
- chamber of the ovary seen by cross-section of the bud or inside a dehisced fruit
- mallee
- the growth form of many eucalypts, i.e. a multi-stemmed shrub; sometimes used loosely for a low straggly short-trunked tree)
- morphology
- shape or form, or the study of them
- node
- the point of attachment of leaves on a stem
- obconical
- conical but inverted with the narrow end to the point of attachment
- oblique
- of the leaves, when the two sides of the leaf base meet at different points on the midrib or petiole; of the anther, when the slits of dehiscence slope inwards towards the top of the groove separating the sacs
- oblong
- when the sides of the leaves are parallel and narrow abruptly at both ends
- obovate
- when the broadest part of an ovate leaf is beyond the middle
- operculum
- in eucalypts, the cap of a flower bud which is formed by the fusion of the sepals or the petals, and dehisces at maturity exposing the reproductive organs
- orbicular
- more or less round
- ovary
- the base of the female reproductive part of a flower comprising a central axis, the placentae, and the ovule-containing chambers
- ovate
- when the leaves are egg-shaped with the broadest part towards the petiole
- ovoid
- egg-shaped (of solids)
- ovule
- the organ of a seed-plant borne on the placenta that develops into a seed after fertilisation
- panicle
- a branched inflorescence
- papillose
- covered with glandular hairs
- pedicel
- the stalk of a flower, bud or fruit
- peduncle
- the common stalk of a cluster of flower buds
- peltate
- when the petiole of the leaves is attached on the underside within the margin
- penniveined
- feather-like; when the side veins of the leaf are very numerous, parallel, close together and at a relatively wide angle to the midrib
- peppermint
- of the bark, when the dead bark is persistent, relatively short-fibred, firm, interlaced and finely fissured longitudinally; of the leaf oils, detected when a strong peppermint smell is obtained by crushing the leaves
- persistent
- when the dead bark is not shed yearly and accumulates in the following forms - stringy, peppermint, compact, box, ironbark
- petiole
- leaf stalk
- pith
- the inner core of tissue of a plant stem
- placenta
- in flowering plants, the tissue in the ovary chamber bearing the ovules
- powdery
- when the bark surface has a white powder that can be rubbed off easily with fingers
- pyriform
- pear-shaped
- reniform
- kidney-shaped; of the anthers and cotyledons
- reticulation
- network of veins in the leaf
- ribbony
- when long strips of partly shed bark remain in the crown or draped down the trunk
- rim
- the upper edge of the fruit
- rugose
- wrinkled
- scar
- ring scar on the side of a flower bud left by the loss of the outer operculum
- scribbles
- the irregular markings on the living bark of some species caused by burrowing insect larvae
- seedling
- the growth phase of the leaves between the cotyledons and the juvenile
- sepal
- the outer perianth whorl of a flower which in eucalypts may become fused into a single structure, the outer operculum
- sessile
- of a leaf, bud or fruit, lacking a stalk
- shrub
- a mallee that is low and very irregularly branched, without principle erect main stems
- simple
- of the inflorescence, when it is unbranched
- species
- the basic unit of classification which usually refers to one or several groups of plants or other living organisms that interbreed and maintain their distinctive identity through successive generations
- stamen
- the male reproductive part of a flower comprising in eucalypts a long filament surmounted by an anther
- staminode
- a sterile stamen, one without an anther or with a reduced non-functional anther
- staminophore
- the band of tissue in a flower bud that subtends the stamens
- stellate
- of hairs with radiating papillae, or a star-shaped bud cluster
- stigma
- pollen-collecting structure at the tip of the style
- stocking
- the persistent bark on the lower trunk of an otherwise smooth-barked tree
- striate
- marked with more or less parallel longitudinal ridges
- stringybark
- dead bark that is persistent, long-fibred, thick, furrowed, and interlaced beneath
- style
- the filament surmounting the ovary through which the pollen tube travels from the stigma
- subgenus
- a natural group between genus and section used in the classification of plants
- subspecies
- a form of a species having a distinctive identity and occupying a particular habitat or region
- T
- (type) a botanical specimen on which a name is based
- terminal
- of the inflorescence, occurring at the end of a branchlet and not axillary
- tessellated
- occurring in small thick flakes or small squares
- truncate
- cut off as in a truncate-globose fruit which is spherical minus a small section
- turban-shaped
- of the operculum, like a sheik's turban, a word to describe those opercula with rounded bases wider than the hypanthium
- uncinate
- with a delicate hook at the tip of a leaf
- undulate
- of a leaf surface, wavy, not all in the same plane
- urceolate
- urn-shaped
- valve
- a sector of the roof of the capsule of a eucalypt fruit which is formed in dehiscence and is usually raised to allow the passage of seed and chaff
- variety
- one of two or more forms of a species with a minor morphological distinction
- venation
- the pattern of veins of the leaves
- versatile
- of the anthers, attached to a fine tip of the filament and able to pivot
- winged
- the longitudinal "wings" of a prominently 4-sided stem
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