Irish Wildflowers Irish Wild Plants Irish Wild Flora Wildflowers of Ireland
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Common glossary terms used
This listing gives a short explanation, sometimes by word, sometimes by picture, of the more common botanical terms used on this website and in field-guides and handbooks.
Wing:
Thin flange or membranous structure running down the stem or leaf-stalk. Also a lateral petal of a Pea family wildflower
Achene:
One-seeded dry fruit that does not split as seen on Traveller’s Joy
Acid soil:
Having few basic minerals, usually peat soil
Acute:
Sharply pointed
Alien:
Introduced by man
Alternate:
Leaves singly along a stem and not opposite each other
Annual:
Plant completing life cycle in one year
Anther:
Pollen-bearing tip of stamen. The mauve tip in the picture is of Corn Spurrey.
Appressed:
Flattened against the stem as in hairs on Long-headed Poppy
Arrow-shaped:
Leaf in the shape of the point of an arrow with two backward pointing points as in Arrowhead
Axil:
Angle between upper surface of leaf and stem as seen in Thyme-leaved Speedwell
Basal:
Appearing at bottom of plant at ground level as in Foxglove
Beak:
Elongated projection at tip of fruit as in Shining Cranesbill
Berry:
Fleshy fruit in which the coated seeds are embedded in the flesh of the fruit as in Hawthorn
Bi-pinnate:
Pinnate leaf in which the leaves are further divided into two.
Biennial:
Lives for two years, first year produces leaf-rosette, second year flowers
Bog:
Habitat on wet, acid peat
Bract:
Scale-like modified leaf sometimes found at the base of flower stalks or immediately under a flower.
Bulb:
Underground swollen structure containing next year’s leaves and buds
Bulbil:
Small bud-like organ at base of leaves which break off forming new plants
Calyx:
Outer part of flower made up of sepals, usually green but may be petal-like. Calyx of Cowslip is fused sepals formed into a tube
Capsule:
Dry fruit that splits to allow seeds to be disseminated as in Poppies
Carpel:
One of the units of which the pistil is composed consisting of ovary, style and stigma.
Catkin:
Hanging spike of tiny flowers
Chlorophyll:
Green pigment present in plant leaves necessary for photosynthesis
Clasping:
Describing leaves with backward pointed lobes clasping the stem
Cluster:
Loose group of flowers
Composite:
Member of the Daisy family
Compound:
Leaf divided into leaflets as in Herb Robert
Cordate:
Heart shaped
Corm:
Swollen underground stem
Corolla:
Collective term for the petals
Crucifer:
Member of the cabbage family
Deciduous:
Plant whose leaves fall in autumn
Dentate:
Same as toothed as in the margin of the leaf of the Common Nettle
Digitate:
Leaf like a spread-out hand with well-divided fingers
Dioecious:
With male and female plants on separate plants
Disc-floret:
One of the inner florets as in centre of Coltsfoot
Drupe:
Succulent fruit with the seed inside encased in a hard coat – our blackberry is a collection of drupes, each one containing a hard-coated seed
Entire:
Meaning the margin of a leaf is untoothed
Epicalyx:
Ring of sepal-like organs just below true sepals – see Rose family
Epiphyte:
Plant growing on another plant but not parasitical
Female:
Without stamens, containing styles only
Fen :
Habitat on wet, lime-rich peat, not acid as in a bog
Filament:
Stalk part of the stamen which bears an anther at the tip.
Fruit:
Seed of plant
Genus:
Group of closely related species with the same genus name
Glabrous:
Hairless
Gland:
Sticky structure at the end of a hair
Glaucous:
Blue-grey
Globose:
Spherical
Hastate:
Referring to a leaf with a pointed tip and two outward-pointing lobes at the base
Herb:
Non-woody plant, not a tree or bush
Hips:
Brightly coloured false fruits as in Japanese Rose
Hoary:
Greyish with short hairs
Hybrid:
Plant resulting from cross-fertilisation of two different species
Inflorescence:
The total flower, including bracts
Involucre:
A closely-packed ring or group of bracts immediately below a flower or inflorescence as in members of the Compositae family such as Hawkweeds, Thistles etc.
Keel:
Two lower petals fused boat-like as in flowers of the pea family e.g. Greater Birds-foot Trefoil
Kidney-shaped:
Single-blade leaves being round in the shape of a kidney as in Winter Heliotrope
Labiate:
Belonging to the Labiate family – often scented and two-lipped – as in Woundwort
Lanceolate:
Of a leaf, narrow and spear-shaped, much longer than wide
Latex:
White fluid or sap within stem of plant such as in the Eurphorbia or Spurge family
Lax:
Open and not dense
Leaflet:
Leaf-like part or lobe of leaf
Ligule:
Flap at the base of blade of grass where it joins the stem
Linear:
Describing a parallel-sided and slender leaf
Lip:
Lower part of a flower with irregular petals as in Orchids or Labiates
Lobe:
One of the divisions of a leaf or petal
Lobed:
Leaf with indentations in the margin not reaching the midline if pinnately lobed, or the midpoint if palmately lobed. Example is of Round-leaved Crowfoot
Male :
Without styles, containing stamens only
Marsh:
Wet ground but not on peat
Microspecies:
Division within species where the differences are very subtle
Midrib:
Central vein of a leaf
Native:
Not known to have been introduced into the country
Nectar:
Sugary substance secreted by many flowers which attracts insects
Nectary:
Organ in the flower which produces nectar
Node:
Point on the stem where the leaf or branches emerge as in Trailing Tormentil
Nut:
Dry one-seeded fruit with hard outer case
Obtuse:
Describing a leaf which is blunt-tipped
Opposite:
Describing leaves which are opposite each other on the stem
Ovary:
Swollen seed-producing part at the base of the pistil where the ovules or immature seeds are contained as in Bittersweet
Ovate:
Describing a leaf which has an oval outline
Palmate:
Describing a leaf with finger-like lobes coming from the same point but not divided to the same extent as digitate
Panicle:
An inflorescence which is branched as in Lady’s Bedstraw
Parasite:
Plant that derives its nutrition from another living organism, usually without green colouring
Peat:
Soil made from undecayed plant matter
Pedicel:
Stalk of an individual flower
Peltate:
Shield shaped having a central rather than a lateral stalk
Perennial:
Plant which lives more than two years
Perfoliate:
Describing leaves which surround the stem
Perianth:
Collective term for flower’s petals and sepals
Petals:
Organs above sepals, often conspicuous, surrounding reproductive organs of flower
Petiole:
The stalk of a leaf
Pinnate:
Describing a leaf divided with opposite pairs of leaflets and a terminal one, like a feather
Pinnately lobed:
Leaf divided with opposite pairs of leaflets as in Dandelion leaf
Pod:
Container for fruits as seen in the Pea family
Pollen:
Tiny grains containing male cells produced by flower’s anthers
Procumbent:
Lying on the ground
Prostrate:
Growing very close to the ground
Pubescent:
With downy hairs
Raceme:
A long cluster of stalked flowers along a central stem, oldest flowers at the base, youngest at the tip, as in Cuckoo Flower
Ray-floret:
Flat outer strap-like flowers that surround the central disc in a composite flower, as in the white parts of a Daisy
Receptacle:
Swollen part of a stem to which flower is attached
Recurved:
Curving backwards
Rhizome:
Underground stem such as in the Iris
Rhomboid:
Leaf shape like parallelogram where adjacent sides are unequal length
Rosette:
Radiating arrangement of leaves at ground level as in Bucks-horn Plantain
Runner:
Above-ground stem, horizontal, often rooting at nodes, as in Trailing Tormentil
Saprophyte:
Plant lacking chlorophyll which gets its nutrition from decaying matter
Scale:
Small appendage, normally small, not resembling a leaf as in Coltsfoot
Seed pod:
Simple pod with single row of seeds. When ripe it splits lengthwise in to and releases the seeds as in Annual Wall Rocket
Sepal:
One of the outer parts of a flower immediately below petals, usually green, as in Common Chickweed - but may be petal-like
Sessile:
Describing a leaf, flower or fruit without a stalk
Shrub:
Relatively low woody plant having several branches from near the base.
Solitary:
Flower borne singly either from base of plant or from leaf axil and not in a formal inflorescence
Spadix:
Spike of florets as in Lords and Ladies
Spathe:
Large bract or sheath surrounding the spadix as in Adder’s Tongue
Spatulate:
Referring to a spoon-shaped leaf
Species:
Division within classification containing organisms closely resembling each other
Spike:
Long cluster of unstalked flowers along a central stem as in Agrimony
Spreading:
Describing a plant branching horizontally or describing hairs at right angles
Spur:
Hollow tubular extension of the corolla as in Toadflax
Stamen:
Male part of the flower made up of the pollen-bearing anther and filament (slender stalk)
Stigma:
Surface of the female part of the flower which receives the pollen, may be forked or knob-like
Stipule:
Leaf-like organ at base of a leaf-stalk as on Giant Hogweed
Stolon:
Creeping stem
Style:
Female part of the flower between the stigma and the ovary
Subspecies:
Division of organisms immediately below species, distinct but interbreeding
Succulent:
Swollen and fleshy
Tendril:
Slender twining growth used for climbing e.g. as in Hairy Tare
Toothed:
Leaf with a saw tooth edge as in Marsh Cinquefoil
Trefoil:
Leaf with three separate lobes as in Clover and our national plant Shamrock
Trifoliate:
Leaf with three separate lobes as in Clover and our national plant Shamrock
Truncate:
Ending abruptly
Tuber:
Swollen part of the stem or root (like a potato)
Tubercle:
Small swelling
Umbel:
Carrying flowers on an upside-down umbrella-like structure as in Giant Hogweed
Whorl:
Several leaves or branches radiating from the same point of a stem as in Cleavers