PLANT NOMENCLATURE AND CLASSIFICATION

1 PLANT NOMENCLATURE AND CLASSIFICATION . Bert T. Swanson and Jeff Pilla PLANT NOMENCLATURE SCIENTIFIC: Viburnum trilobum Alfredo'. PLANT NOMENCLATURE is the basis for uniform worldwide COMMON: Alfredo American Highbush Cranberry identification of, and communication about, PLANT materials. Guidelines for the naming of plants are set PLANT scientific names are called binomials because forth in the International Code of NOMENCLATURE for they consist of two names: cultivated plants. 1. Genus, the plural is Genera. It is important for nursery personnel to recognize, identify, and communicate about plants by both 2.

2 Species, the plural is Species. scientific and common names. A specific PLANT , correctly described by only one scientific name may The genus name describes the type of PLANT , maple, have a number of common names. Professionals must oak, sumac, etc. The species name describes the know about plants' relationships to each other, individual PLANT within the genus, red maple, white scientific and common names, life cycles, structures oak, staghorn sumac, etc. The genus name is always and functions. Such basic botanical knowledge is capitalized.

3 Both the genus and species names are integral to the art and science of horticulture. always underlined or italicized. The species name is Customers expect industry representatives to be PLANT never capitalized. A botanical variety name ( var.'), a "experts". The only way to assure that a specific PLANT form ( F') or a sub-species ( ssp.') may be added to the is being communicated accurately is to include the binomial. scientific name in its description. The following two examples show the many common names used for a The sub-species is a sub category of the species.

4 It is a single PLANT : population of plants differing from others in a species, but not enough to be called a separate species. A. SCIENTIFIC: Arctostaphylos uva-ursi variety is much the same as a sub-species, but it is less COMMON: Bearberry, Bog Cranberry, Mealberry different from other plants in the species. Varieties are Mountain Box, Bear's Grape, written as follows: Sandberry, Creashak, Kinnikinick SCIENTIFIC: Clematis dioscoreifolia var. robusta SCIENTIFIC: Carpinus caroliniana COMMON: Sweet Autumn Clematis COMMON: Blue Beach, American Hornbeam The word cultivar' is a term coined by contracting the The system of scientific NOMENCLATURE used today was term cultivated variety' and is different from the developed in the 1700's by the Swedish botanist Carl naturally occurring botanical variety'.

5 Cultivar Linneaus (1707-1778). Linneaus' system placed plants names are always capitalized and are set off in single into groups based on similar characteristics. Large quotation marks or preceded by the abbreviation cv'. groups are subdivided into smaller groups based on as follows: more specific characteristics. Latin, the common language of Linneaus' time, is still the international SCIENTIFIC: Acer rubrum Northwood'. language of scientific NOMENCLATURE . Categories COMMON: Northwood Red Maple commonly used to describe plants are: Family, Genus, and Species.

6 The system, set up by Linneaus, is the A hybrid is commonly produced by crossing two or one used in HORTUS THIRD, which is the most more species or cultivars. Most hybrid woody plants complete PLANT NOMENCLATURE reference available. are vegetatively propagated because they either fail to The complete scientific name of a PLANT developed or produce viable seed or fail to come true if viable seed maintained under cultivation always includes the genus is produced. Hybrid cultivars require long, and species, and variety name , if applicable.

7 The first cumbersome names if the complete parentage is recited two names are in Latin and the latter is in words of a in the scientific name . Therefore, in most cases, common language as follows: hybrids are named by listing the genus and the cultivar 10-1. 1106. name only. The cultivar name is preceded by a capital discoverer. Patented plants are sold under the name X which designates that it is a hybrid as follows: specified in the approved patent documentation. SCIENTIFIC: Malus X Radiant' A PLANT Trademark or Registration provides a COMMON: Radiant Flowering Crabapple third, and more recent, means of providing legal protection to PLANT breeders.

8 Because cultivar names The scientific botanical name is key to locating all are intended to be used freely for identification information that is written about a particular PLANT . In purposes and trademarks are restricted to use by an addition, knowing a scientific name aids in authorized person only, a cultivar name may not be establishing a reputation as a professional considered a trademark. This creates some horticulturist. identification and marketing confusion as identical plants can be coded with different names as shown Many common and botanical names are similar.

9 As an below: aid in learning, it is judicious to recognize botanical Registered or names derived from countries of origin, names of PLANT Genus Cultivar Trademark explorers, or English words taken from Latin. Words such as chinensis, japonica, carolinianum, and Acer Celzam' Celebration . canadensis are Latinized geographical names. The name , Syringa amurensis japonica or Japanese Tree Betula Cully' Heritage . Lilac, indicates that this PLANT is from Japan. The names douglasii, darwinii, and sargentii are taken from Ilex Chamzin' Nordic.

10 PLANT explorer names. Equally easy to recognize are Latin descriptive names, such as nana, rubra, and Physocarpus Monlo' Diabolo . nigra. Trademarks improve the marketability of a PLANT by Although the number of names to learn may seem providing a "catchy" name as well as legal protection overwhelming, it is very important that nursery and of the product. Retailers can purchase a license to use landscape professionals know the correct botanical and the trademark with the fees being paid to the breeder. accepted common names of plants.