F
- F1 hybrid
- a single cross; a plant breeding term for the result of a repeatable cross between two pure bred lines.
- F2 hybrid
- a plant breeding term for the result of a plant arising from a cross between two F1 hybrids; may also refer to self-pollination in a population of F1 hybrids.
- facultative
- of parasites, optional; compare obligate.
- falcate
- curved like the blade of a scythe.
- family
- a formal group of one or more genera with features and/or ancestry in common; the term for the principal rank between order and genus.
- fascicle
- (adjective fasciculate) cluster, e.g. a tuft of leaves all arising from the same node.
- fastigiate
- parallel, clustered and erect, e.g. the arrangement of branches in the Lombardy Poplar.
- felted
- covered with very dense, interlocked and matted hairs with the appearance or texture of felt or woollen cloth.
- ferruginous
- rust-colored.
- fertile
- capable of producing fruit; of flowers when they produce seed or of anthers containing pollen.
- fertilization
- union of male and female gametes.
- filament
- 1. stalk of a stamen
- 2. thread, one or a few cells thick.
- filamentous
- consisting of filaments or fibres.
- filiform
- thread-like. See Leaf shapes.
- fimbriate
- fringed.
- fissure
- a split or crack, often referring to fissured bark. also, a line or opening of dehiscence.
- flabellate
- fan-shaped.
- flaccid
- limp; tending to wilt; compare turgid.
- flexuous (flexuose)
- bent alternately in different directions; zig-zag.
- floccose
- with a soft and woolly covering of hairs.
- flora
- 1. all the plants growing in a certain region or country.
- 2. an enumeration of them, generally with a guide to their identification (e.g. the present volume, the Flora of Victoria, the Flora of New South Wales and so on). In this case 'flora' is written with a capital F.
- floral leaves
- the upper leaves at the base of the flowering branches.
- floral tube
- tube bearing the perianth and stamens, consisting of tissue derived from the receptacle and/or perianth and/or stamens; hypanthium.
- floret
- literally a small flower, but usually refers to the individual true flowers clustered within an inflorescence, particularly in inflorescences of the daisy and grass families.
- flower
- the sexual reproductive structure of the angiosperms, typically with a gynoecium, androecium, perianth and an axis.
- follicle
- a dry fruit formed from one carpel, splitting along a single suture, to which the seeds are attached; cf. pod (of legume).
- forb
- any non-woody flowering plant that is not a grass, sedge, or rush.
- forest
- vegetation dominated by trees with single trunks (including closely arranged trees with or without an understorey of shrubs and herbs).
- forma (in common usage, form)
- a taxonomic category subordinate to species and within the taxonomic hierarchy, below variety (varietas), usually differentiated by a minor character.
- free
- not united with others organs of the same type; not attached at one end.
- free central
- of placentation, ovules attached to a free-standing column in the centre of a unilocular ovary.
- frond
- a leaf of a fern, cycad or palm.
- fruit
- seed-bearing structure in angiosperms formed from the ovary, and sometimes associated floral parts, after flowering.
- funicle (funiculus)
- the stalk of an ovule.
- funnelform
- with a form gradually widening from the base to apex; funnel-shaped.
- fused
- joined together.
- fusiform
- 3-dimensional, narrowing gradually from the middle towards each end; spindle-shaped.
Read more about this topic: Glossary Of Botanical Terms