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Genus

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Published on January 1st 2019
2
As defined by the Oxford Dictionary:
a group into which animals, plants, etc. that have similar characteristics are divided, smaller than a family and larger than a species
If you see a plant labelled for example Rosa sp., you'll know the plant is one of the many species that belong to the Rose genus. Rosa spp. is used when you want to talk about the genus as a whole.
A red rose on a Rosa plant

Rose

Rosa spp.

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Species

For example, a plant labelled Rosa rugosa is able to produce viable seeds which will produce new plants.
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Subspecies

As defined by the Cambridge Dictionary.
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Variety

In botanical nomenclature, varieties of a plant are written using the abbreviation var.:
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