Nomenclature Scientific Plant Classification Early Classification Started by the Greek philosopher Theophrastus Classified all plants into annuals, biennials, and perennials, according to life span Herbs, shrubs, and trees, according to their growth habit Modern Taxonomy Modern classification of plants is based on Linnaeus (Carl von Lenné), a 18 th century Swedish physician and “the father of taxonomy” who revolutionized the field of plant and animal classification Use of binomial nomenclature - Genus and species for scientific names Use of trinomial nomenclature for horticultural crops Genus, species, and cultivar for cultivated
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Nomenclature Scientific Plant Classification Early Classification Started by the Greek philosopher Theophrastus Classified all plants into annuals,
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NomenclatureScientific Plant Classification
Early Classification Started by the Greek philosopher Theophrastus Classified all plants into annuals, biennials, and perennials, according to life span Herbs, shrubs, and trees, according to their growth habit
Modern Taxonomy Modern classification of plants is based on Linnaeus (Carl von Lenné), a 18th century Swedish physician and “the father of taxonomy” who revolutionized the field of plant and animal classification Use of binomial nomenclature
- Genus and species for scientific names Use of trinomial nomenclature for horticultural crops
Genus, species, and cultivar for cultivated crops
Scientific NamesRed Delicious Apple
ClassificationRed Delicious Apple
KingdomPlantae
DivisionAnthrophyta
ClassDicotyledonae
OrderRosales
FamilyRosaceae
Genus Malus (or Malus)
Speciesdomestica (or domestica)
Variety (naturally occurring)
(cultivar) ‘Red Delicious’
Form--
Individual --
Botanical Names for Horticultural Crops
Mostly deals with family, genus, species, and cultivar Binomial for botanical names Italicize or underline genus and species
Genus species (or Genus species)
Do not underline or italicize family and cultivar names Rosaceae (the rose family) Malus domestica cv. Golden Delicious
Variety names may be underlined or italicized Picea glauca var. densata Black Hills Spruce Picea pungens cv. Hoopsii Hoops Blue Spruce
Blue Spruce
Natural botanical varieties are seed propagated Cultivars are propagated asexually by cuttings or grafting
Picea pungens var. glauca Picea pungens cv. Hoopsii
• About 90 genera, 2200 species• Mostly native to South America• Genus Solanum is the largest with 1700 species• Many species contain alkaloids, solanine, nicotine,
Garlic Festival Held in Gilroy, CA, - Garlic capitol of the world (122,000 visitors in 2004) 28th annual Gilroy garlic festival was held July 28-30, 2006
Orchidaceae (Orchid Family)Monocots
• About 800 genera, 30,000 species• Mostly native to tropical and subtropical regions• Epiphytic as well as terrestrial growth habits• Many species are used as ornamentals• Examples