APPENDIX I
NAMES OF HYBRIDS

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 (Jess.) Harz (1885).

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).