H.8.1. When the name or the epithet in the name of a nothotaxon is a condensed formula
(Art. H.6 and H.7), the parental names used in its formation must be those which are correct for the particular circumscription, position, and rank accepted for the parental taxa.
Ex. 1. If the genus Triticum L. is interpreted on taxonomic grounds as including
Triticum (s. str.) and Agropyron Gaertn., and the genus Hordeum L. as including
Hordeum (s. str.) and Elymus L., then hybrids between Agropyron and
Elymus as well as between Triticum (s. str.) and Hordeum (s. str.) are placed in the same
nothogenus, ×Tritordeum Asch. & Graebn. (1902). If, however, Agropyron is separated generically from
Triticum, hybrids between Agropyron and Hordeum (s. str. or s. lat.) are placed in the nothogenus
×Agrohordeum A. Camus (1927). Similarly, if Elymus is separated generically from
Hordeum, hybrids between Elymus and Triticum (s. str. or s. lat.) are placed in the nothogenus
×Elymotriticum P. Fourn. (1935). If both Agropyron and Elymus are given generic rank, hybrids between them are placed in the nothogenus
×Agroelymus A. Camus (1927); ×Tritordeum is then restricted to hybrids between
Hordeum (s. str.) and Triticum (s. str.), and hybrids between Elymus and
Hordeum are placed in ×Elyhordeum Mansf. ex Tsitsin & Petrova (1955), a substitute name for
×Hordelymus Bachteev & Darevsk. (1950) non Hordelymus (K. Jess.) K. Jess. (1885).
H.8.2. Names ending in -ara for nothogenera, which are equivalent to condensed formulae
(Art. H.6.3-4), are applicable only to plants which are accepted taxonomically as derived from the parents named.
Ex. 2. If Euanthe Schltr. is recognized as a distinct genus, hybrids simultaneously involving its only species, E. sanderiana (Rchb.) Schltr., and the three genera Arachnis Blume, Renanthera Lour., and Vanda W. Jones ex R. Br. must be placed in ×Cogniauxara Garay & H. R. Sweet (1966); if, on the other hand, E. sanderiana is included in Vanda, the same hybrids are placed in ×Holttumara Holttum (1958) (Arachnis × Renanthera × Vanda).
Subject index | Index to scientific names
| Contact | Regnum Vegetabile
(c) by International Association for Plant Taxonomy. This page last updated Feb. 12, 2001.