Current Word List, Records = 91

Definitions

Word
Definition
achene
a small, dry, hard, one celled, one seeded, non-splitting fruit. test
acuminate
taper-pointed
alternate
leaves or branches occurring singly at the nodes. (click here to see Alternate leaves)
annual
of one year's duration
anther
the part of the stamen that contains the pollen. (click here to see flower)
axil
the upper angle between a leaf and the stem. (click here to see leaf)
axillary
occurring in the axils.
bract
modified leaves surrounding the inflorescence or flower, more or les different from ordinary leaves; always stalkless (sessile). (click here to see composite-flower)
calyx
the outer circle of floral leaves, consisting of the sepalswhich may be distinct or joined together. If only one circle of floral leaves is present, it is called a calyx even though it appears like a corolla.
catkin
a scaly spike of small flowers of which the pussy willow is a typical example.
ciliate
fringed with hairs
corolla
the inner circle of floral leaves (petals), that are usually showy. The petals may be seperate or united. The corolla is always surrounded by a calyx.
corymb
a flat or convex flower cluster, with branches arising at differnt levels and flowers opening at the outer edges first.
Cotyledons
The first leaves that are produced from the seed
deciduous
Dentate
Toothed: refering to leaf margins with toothed edges.
Dioecious
Unisexual, with male and female flowers on seperate plants
Disk
central region of a head of flowers like the sunflower
Dissected
Leaves cu deeply into many lobes or divisions
Entire
the margin (usually of leaves) that is not notched or toothed in any way.
Evergreen
holding the leaves over winter or longer, until new ones appear.
Fertile
Capable of bearing fruit
Filament
The stalk of a stamen. Also any thread-shaped appendage.
Floret
A small flower, usually of a dense cluster of flowers.
Flower
a test flower definition (Composit Flower)
Frond
The leaf of a fern.
Genus
A group of plants made up of closely related species. (plural genera)
Glabrous
Smooth, hairless, bristleless
Glaucous
Covered with a fine white powdery substance that rubs off, like that on a cabbage leaf.
Habitat
The situation in which a plant grows.
Hemaglobinurea
Red or dark brown colored urine due to the presence oh hemoglobin in the urine.
Hematuria
The presence of red blood cells in the urine.
Hepatotoxic
Toxic to the liver.
Herb
A plant with no persistant woody stem.
Herbaceous
Not woody. Applied to plants that are herbs as opposed to shrubs or trees.
Imbricated
Overlapping like shingles on a roof
Imperfect flower
Lacking either stamens or pistils.
Inferior
Applied to the seedpod (ovary) when the calyx and corolla are placed on top of it, as opposed to being inserted at its base.
Inflorescence
The flowering part of the plant.
Involucre
A whorl of bracts around a flower.
Irregular
Used to describe a calyx or corolla in which all parts are not alike. A rose is regular, a sweet pea is irregular.
Keel
The two lower petals of the flowers of the legume or pea family.
Leaflet
One of the devisions of a compound leaf. (click here to see compound leaf)
Linear
Narrow and flat, with parallel margin
Lobe
Rounded projection of a leaf. (click here to see a lobed leaf)
Midrib
Middle or main rib of a leaf.
Montane
The region between 6,000 and 9,000 feet altitude. Usually contains a mixed forest of pine, fir, spruce and aspen.
Nephrotoxic
Toxic to the kidneys
Node
The points on a stem from which the leaves arise.
Obovate
The broad end of a leaf upward or at the opposite end to the leaf stalk or petiole. (click here to see obovate leaf)
Opposite
Applied to leaves and branches where an opposing pair occurs at each node. (click here to see opposite leaves)
Ovary
The part of the pistil which contains the ovules (seeds) (click here to see flower structure)
Ovate
Shaped like an egg, with the broader end of the leaf nearest the petiole (leaf stalk). (click here to see ovate leaf)
Palmate
A leaf whose leaflets all arise from the apex of the petiole like a hand without stretched fingers. (click here to see palmate leaf)
Panicle
An open or dense cluster in which the secondary branches are branched again. Usually refers to an inflorescence. (click here to see to see a panicle)
Pedicel
The stalk of each individual flower in a cluster.
Peduncle
A flower stalk of a single or cluster of flowers.
Pendent
Hanging.
Perennial
Lasting from year to year.
Perfect
A flower containing both pistils and stamens. (click here to see flower structure)
Perianth
The floral envelopes of the flower, especially when the petals and sepals cannot be differentiated. eg: many lilies.
Petal
A constituent member of the corolla. (click here to see flower structure)
Petaloid
Petal-like
Petiole
Photosensitization
Dermatitis involving the white skinned areas induced by the reaction of certain chemicals, or plant compounds with sunlight or ultraviolet light that causes cellular damage to the cappaillaries in the skin with subsequent inflamation and death of the skin.
Pinnate
Leaflets arranged along the long axis of the leaf. (click here to see pinnate leaf)
Pinnately lobed, divided
Variable divisions of a pinnate leaf. (click here to see a pinnately lobed leaf)
Pistil
The seed-bearing organ of the flower. It consists of the ovary which becomes the seed pod, and the style and stigma. (click here to see flower structure)
Pubescent
Covered by fine, soft hairs.
Raceme
A flower cluster with single flowers along the axis of the inflorescence. (click here to see raceme)
Ray
The marginal flower of a head or cluster when different from the rest eg: sunflower.
Reniform
Kidney shaped.
Sepal
Serrate
Leaf margin with forward pointing teeth.
Sessile
Without a stalk
Shrub
Woody perennial, smaller than a tree, usually with multiple stems.
Spatulate
Gradually rounded downward from a rounded summit (click here to see spatulate leaf)
Species
A group containing all the individulas of a particular kind of plant.
Spicate
Arranged in or resembing a spike
Spike
A simple inflorescence with the flowers sessile or nearly so, arranged along a elongated common axis. (click here to see spike)
Stamen
The pollen-bearing organ made up of the filament and the anther that contains the pollen. (click here to see flower structure)
Stigma
The region of the pitil that receivs the pollen. (click here to see flower structure.
Stipules
The appendages on each side of the base of certain leaves.
Style
The beak-like prolongation of the pistil above the ovary, which bears th stigma.
Umbel
The umbrella-like form of inflorescence in which the peduncles or pedicles all arise from one point. (click here to see an umbel)
Whorl
A group of thre or more leaves or stems radiating from a node. (click here to see whorled leaves)