Achenes A dry, one-seeded fruit, which ripens without bursting 
Acrocarpous Bearing fruit at the top of the main stem
Actinomorphic Radially symmetrical 
Aestivation The arrangement of flower petals in the bud before opening
Anandrous Without stamens
Anastomoses The union of ramifications of leaf veins
Anthers The part of the stamen which produces pollen and to which the filament is usually attached 
Arils An outer coating to some seeds, often bright in colour
Axillary Relating to an axil, growing in the axil (of buds) 
Bipinnate Having leaflets growing in pairs on paired petioles
Bracts A leaf in whose axil a flower grows
Calyptra Hoodlike covering of a flower or fruit 
Calyx An outer whorl of floral leaves forming the protective the protective covering of a flower bud. 
Campanulate Bell shaped 
Capitulum A rounded or flattened head of sessile flowers, a flower head
Capsule A dry, dehiscent fruit composed of 2 or more carpels
Carpels Part of the structure of a seed plant 
Carpophores A slender prolongation of the flora axis which supports the carpel
Cataphylls Coloured sepals
Corolla A whorl of petals especially brightly coloured growing from the receptacle of a flower between the calyx and stamens.
Corymb A raceme with lower pedicels elongated so that the top of the inflorescence is nearly flat.
Corymbform Having the shape of a corymb
Crenate Having a toothed edge, with scalloped margin
Cuneiform Wedge-shaped
Cyme An inflorescence in which the peduncle terminates in a single flower. Other flowers grow later on lateral shoots.
Cymose Of, like or derived from a cyme
Deciduous Falling at the end of the growth period or at maturity
Dehiscence The spontaneous opening of a closed structure, along certain lines or in definite a direction to release the contents
Dentate Toothed, having a sharp, saw-like edge
Didymous Growing in pairs
Drupes A fleshy fruit with one or more seeds, each surrounded by a hard layer
Endocarp The innermost layer of the pericarp when it is differentiated
Epicarp The outermost layer of the pericarp
Epigynous Growing on top of the ovary
Fasciculated Arranged in clusters
Filament The stalk of a stamen bearing the anther
Filiform Thread-shaped
Gamopetalous Sympetalous, with all the petals joined
Gamophylious With leaves joined by their edges
Gamosepalous With the sepals joined
Glutinous Glue-like, viscous
Herbaceous Not becoming woody
Heterogamous Having flowers which are differentiated sexually
Heteromorphic Having different forms or sizes at different stages of development
Heterophyllous Bearing foliage of different kinds on one plant or plant part
Homochromatic Having the same colour
Hypogynous Growing from below the ovary and not adhering to it
Imbricate Having parts overlapping each other
Inflorescence The way in which flowers are arranged or develop on an axis
Infundibuliform Funnel-shaped
Involucre A calyx-like structure formed by of bracts around or just below the base of a usually condensed inflorescence
Lamina The blade of a leaf or petal
Lanceolate Narrowing to a point at each end or at a tip
Locule A small cavity in the ovary or in an anther
Mesocarp The middle layer of a pericarp when it is differentiated into three layers
Midvein The central vein of a leaf
Monospermic Having only one seed
Ovary The hollow chamber in which ovules are borne
Panicles A loose irregular flower cluster (a compound raceme)
Paniculate Arranged in panicles
Papilionaceous Shaped like a butterfly especially flowers
Pappus A downy or feathery tuft in place of a calyx, used in fruit dispersal
Pedicel A short, slender stalk holding a flower or fruit
Peduncles Pedicels
Pericarp The ripened walls of a plant ovary that may be more or less homogenous or consist of up to three layers: endocarp, mesocarp, epicarp
Petiole A stalk holding a leaf
Pinnate Having leaflets on each side of the rachis
Pistil Female seed bearing organ of a flower including the ovary, stigma and the style
Placentation The development of a placenta
Pubescent A downy or hairy covering
Racemose Bearing an unbranched inflorescence having stalked flowers with the youngest growing at the tip
Receptacle The part of a plant stem containing germinal buds
Schizocarp A compound fruit which splits when ripe into several indehiscent portions, each having one seed
Serrate Having notches or teeth like the cutting edge of a saw
Sessile Attached directly at the base with, with no intervening support such as a pedicel, peduncle or stalk.
Stamen The male organ of a flower, consisting of a filament bearing an anther containing pollen
Staminodium A rudimentary, imperfect or sterile stamen
Stigma The part of the pistil or gynoecium, which receives the pollen
Style The slender stalk-like of the pistil connecting the stigma to the ovary
Testa Outer coat of a seed
Thrysus An inflorescence in which the main axis is racemose and the secondary axes are cymose
Tomentum A close covering of downy, cottony or woolly hairs on leaves or stems
Umbel An inflorescence in which all the pedicels from the top of the main stem and form a flat or rounded cluster
Unisexual Of only one sex, either male or female
Urceolate Pitcher-shaped
Valvate Having petals or sepals that meet at their edges but that do not overlap
Zygomorphic Bilaterally symmetrical divisible into two similar parts in only one plane