VIEWS: 9 PAGES: 16 POSTED ON: 9/18/2012
Nomenclature Nomenclature is the system of orderly classifying and naming Botanical Nomenclature is the system orderly classifying and naming plants Living creatures are divided into several Kingdoms Plant Kingdom is our interest here Nomenclature Within the Plant Kingdom plants are divided into four principle subdivisions called divisions. Nomenclature - Divisions Thallophytes (algae & fungi) Bryophytes (mosses and liverworts) Pteriodophytes (ferns; reproduce by means of spores) Spermatophytes – (seed bearing plants; have true roots, stems, leaves & vascular system) Nomenclature – Spermatophytes Classes Gymnosperm (conifers, Ginkgo) Angiosperm (flowering plants) Subclass Dicot – 2 cotyledons, flower parts generally in 5’s & network veination Subclass Monocot – 1 cotyledon, flower parts generally in 3’s & parallel veination Nomenclature – Orders The subclasses of Angiosperms are divided into orders, the names of which often terminate in –ales, as the Asterales. Nomenclature – Purple Coneflower Kingdom Plantae Division Spermatophytes Class Angiosperm Subclass Dicotyledonae Order Asterales Family Asteraceae Genus Echinacea Species purpurea Nomenclature – The Binomial System The Binomial System: a 2 word scientific name; developed by Carl Von Linne (1737) Genus & specific epithet (species) Each plant has only one valid Scientific Name!!!! Names are given based on International Code of Botanical Nomenclature Nomenclature – The Binomial System Genus Generic name for a plant group (Quercus) Specific epithet Scientific name for one plant (alba) Quercus alba (White Oak) Nomenclature – The Binomial System Special divisions within a plant species: Variety A self perpetuating mutation or off-spring that differs significantly from parent species Cultivar A manmade and or man maintained offspring that differs significantly from parent species Nomenclature – The Binomial System Scientific Names are descriptive and may describe a plant’s: Habitat Betula nigra = water Physical characteristics (leaf, size, form, color, ect.) Magnolia grandiflora = big flower Nomenclature – The Binomial System Scientific Names are descriptive and may describe a plant’s: Place of origin (geography) Camellia japonica Japan Ancient classical name Lycopersicon esculentum Commemorative Ilex x attenuata ‘Fosterii’ Nomenclature – The Common Name Common names can vary from locality, person to person, ect. Tulip poplar or yellow poplar or tulip tree??? Tulip magnolia or saucer magnolia or tulip tree??? Nomenclature – Rules for Writing Genus First letter is always capitalized and the name is underlined or italicized Specific epithet First letter is generally NOT capitalized, the name is underlined or italicized Cornus florida or Cornus florida Nomenclature – Rules for Writing Cultivar A cultivar name is capitalized and placed within single quotes Cornus florida ‘Cherokee Chief’ Variety A variety name is preceded by var. and is underlined or italicized Rudbeckia fulgida var.compacta Nomenclature – Rules for Writing Intergeneric cross: A cross between 2 genera of plants… Rare… x Fatshedera lizei Interspecific hybrids or interspecific cross: 2 plants in the same genus with different species: Abelia x grandiflora "No occupation is so delightful to me as the culture of the earth and no culture comparable to that of the garden"- Thomas Jefferson
"1 Nomenclature lecture"