1) Botanical nomenclature
Found on
https://www.crosswordclues.com/clue/forma-specialis
Forma specialis (plural formae speciales) is an informal taxonomic grouping allowed by the International Code of Nomenclature for algae, fungi, and plants, that is applied to a parasite (most frequently a fungus) which is adapted to a specific host. This classification may be applied by authors who do not feel that a subspecies or variety name is ...
Found on
http://en.wikipedia.org/wiki/Forma_specialis
Literally 'special form'. An infraspecific taxonomic rank in which the taxa are distinguished on a physiological basis, particularly on the basis of adaptation to (or pathogenicity for) one or more specific hosts. In mycology, forma specialis is a taxonomic rank lower than form, subvariety, variety and subspecies, and higher than physiological race...
Found on
http://ppathw3.cals.cornell.edu/glossary/Defs_F.htm
Special form: a biotype (or group of biotypes) of a species of pathogen that differs from others in the ability to infect selected genera or species of susceptible plants. (usually abbreviated as f. sp.). A subspecific taxon usually denoting the host genus of which the organism is a parasite e.g. tritici to denote wheat in
Puccinia graminis f. sp.
tritici....
Found on
http://www.encyclo.co.uk/visitor-contributions.php
No exact match found.
