Article H.2
H.2.1. A hybrid between named taxa may be indicated by placing the multiplication sign between the names of the taxa; the whole expression is then called a hybrid formula.
Ex. 1. Agrostis L. . × Polypogon Desf.; Agrostis stolonifera L. × Polypogon monspeliensis (L.) Desf.; Salix aurita L. × S. caprea L.; Mentha aquatica L. × M. arvensis L. × M. spicata L.; Polypodium vulgare subsp. prionodes (Asch.) Rothm. × subsp. vulgare; Tilletia caries (Bjerk.) Tul. × T. foetida (Wallr.) Liro.
Recommendation H.2A
H.2A.1. It is usually preferable to place the names or epithets in a formula in alphabetical order. The direction of a cross may be indicated by including the sexual symbols ({o+}: female;{o!}: male) in the formula, or by placing the female parent first. If a non-alphabetical sequence is used, its basis should be clearly indicated.
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Subject index | Index to scientific names
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