Forma specialis (plural formae speciales) is a taxonomic grouping allowed by the International Code of Botanical Nomenclature, that is applied to a parasite (most frequently a fungus) which is adapted to a specific host (there being minimal or no morphological differences); this classification may be applied by authors who do not feel that a subspecies or variety name is appropriate.
Forma specialis is abbreviated f. sp., formae speciales is abbreviated ff. spp..
- Alternaria alternata f.sp. cucurbitae (Alternaria leaf spot of Cucurbits)
- Fusarium oxysporum f.sp. basilicum (Fusarium wilt of basil)
On WikiGardener species and genera are always written in italics.
- Form (f.)
- Species (sp. or spp.)
- Subforma (subf.)
- Subspecies (subsp. or ssp.)
- Subvariety (subvar.)
- Variety (var.)
|This page uses Creative Commons Licensed content from Wikipedia (view authors).|