Download Nomenclature

Nomenclature
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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
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Within the Plant Kingdom plants are
divided into four principle subdivisions
called divisions.
Nomenclature - Divisions
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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
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Gymnosperm (conifers, Ginkgo)
Angiosperm (flowering plants)
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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
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The subclasses of Angiosperms are divided
into orders, the names of which often
terminate in –ales, as the Asterales.
Nomenclature –
Purple Coneflower
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Kingdom  Plantae
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Division  Spermatophytes
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Class  Angiosperm
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Subclass  Dicotyledonae
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Order  Asterales
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Family  Asteraceae
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Genus  Echinacea
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Species  purpurea
Nomenclature –
The Binomial System
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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
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Genus  Generic name for a plant group
(Quercus)
Specific epithet  Scientific name for one
plant (alba)
Quercus alba (White Oak)
Nomenclature –
The Binomial System
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Special divisions within a plant species:
 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
 Variety
Nomenclature –
The Binomial System
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Scientific Names are descriptive and may
describe a plant’s:
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Habitat
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Betula nigra = water
Physical characteristics (leaf, size, form,
color, ect.)
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Magnolia grandiflora = big flower
Nomenclature –
The Binomial System
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Scientific Names are descriptive and may
describe a plant’s:
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Place of origin (geography)
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Ancient classical name
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Camellia japonica  Japan
Lycopersicon esculentum
Commemorative
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Ilex x attenuata ‘Fosterii’
Nomenclature –
The Common Name
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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
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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
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Cornus florida or Cornus florida
Nomenclature –
Rules for Writing
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Cultivar  A cultivar name is capitalized
and placed within single quotes
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Cornus florida ‘Cherokee Chief’
Variety  A variety name is preceded by
var. and is underlined or italicized
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Rudbeckia fulgida var.compacta
Nomenclature –
Rules for Writing
Intergeneric
cross: A cross between 2
genera of plants… Rare…
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x Fatshedera lizei
Interspecific
hybrids or interspecific cross:
2 plants in the same genus with different
species:
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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