Names for hybrids

Hybrids, because they occur both in the wild and in gardens, come under both Codes. A hybrid can receive a formula name by combining those of the two parents, thus: Echeveria derenbergii X setosa. or, if considered of sufficient importance, a latinized epithet like a species—in this case: EcheveriaXderosa von Roeder. which includes the author's name at the end. The "X" preceding the specific epithet is the sign of hybridity. Such a collective epithet covers all descendants from that cross, as well as backcrosses to either parent. One particular clone, picked from the first generation seedlings for its neat, compact habit, is widely distributed horticulturally under the cultivar name 'Worfield Wonder'.

Hybrids can even bridge two genera, when a new "generic" name may be coined because the product cannot be accommodated under either of the parental genera. It is compounded from the names of the two parents. Thus, X Seleniphyllum coversaW hybridsof species of Selenicereus with species of Epi-phyllum X Seleniphyllum cooperi covers all crosses between Selenicereus grandi-florus and Epiphyllum crenatum, and X S. "Pfersdorfii' (or X Seleniphyllum cooperi •Pfersdorfii' if written out in full) is one particular clone of that descent.

"Variety" is commonly used in the sense of cultivar, but incorrectly; the term is best restricted to botanical usage as a subdivision of a species.

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