Botanical Latin: The Technical Language of Plant Science
In the world of plant science, precision is paramount. To ensure that a scientist in Tokyo, a gardener in London, and a researcher in New York are all discussing the exact same organism, a specialized language is required. This is Botanical Latin, a technical language based on Neo-Latin used specifically for the description of botanical taxa (groups of organisms).
While the International Code of Botanical Nomenclature mandated its use for describing new taxa from 1935 to 2011, it remains the only language other than English accepted for such descriptions. Even when English is used, the formal names of organisms governed by the Code are built upon Latin forms.
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Key Facts
- Purpose: Used for the formal description and naming of botanical taxa.
- Status: The only language besides English accepted for new botanical descriptions.
- Origin: Evolved from Renaissance Latin and ancient Greek, largely shaped by Carl Linnaeus.
- Complexity: Estimated to take an English speaker approximately three months to learn.
- Alphabet: Uses a 26-letter alphabet, including the modern separation of i/j and u/v.
The Evolution and Origin of the Language
Botanical Latin is not merely ancient Latin; it is a modern Romance language of special technical application. As described by the scholar William T. Stearn, it evolved significantly since 1700, primarily through the work of Carl Linnaeus (1707–78). Because modern botany requires describing structures often too small to be seen by the naked eye—features unknown to the Greeks or Romans—the language had to incorporate precise, restricted terms that classical Latin lacked.
In 1880, Alphonse Pyramus de Candolle noted that this version of Latin was specifically arranged by Linnaeus for use in descriptions, designed for those who prefer to avoid unnecessary grammatical complications.
Orthography and Naming Conventions
While scientific names are generally used in English without change, certain informal derivatives are common. For instance, the subclass ending -idae often becomes -ids in common usage (e.g., Rosidae becomes rosids). Similarly, the subfamily ending -oideae becomes -oids (e.g., Papilionoideae becomes papilionoids).
In other languages, such as French, names are often "gallicized." For example, the taxon Chlorophyceae might be written as Chlorophycées in a French context.
The Botanical Alphabet
The language utilizes a 26-letter alphabet. This was achieved by taking the 21 letters of Pre-Classical Latin, adding y and z during the Classical epoch, adding w later, and eventually separating the vowel/consonant pairs i/j and u/v. Notably, diacritics are not used in taxon names, and a dieresis is considered an optional mark that does not change the spelling.
Pronunciation Systems
Because Botanical Latin incorporates names derived from many different languages—including many personal names—there is no single, consistent pronunciation system. This creates a linguistic landscape where different speakers apply different rules.
Classical vs. English Pronunciation
Some scholars use a reconstructed Classical Latin pronunciation. In this system, stress is determined by syllable length: it falls on the penultimate (second to last) syllable if it is long, or the antepenultimate (third to last) if the penultimate is short. However, this system struggles with the roughly 80% of generic names and 30% of specific epithets that originate from non-Latin and non-Greek languages.
In contrast, most English-speaking botanists and gardeners use a system closer to English pronunciation. This is often the standard used in major medical and botanical dictionaries.
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English Pronunciation Guide
| Letter(s) | IPA | Pronounced like |
|---|---|---|
| ā | /eɪ/ | f a te |
| ǎ | /æ/ | f a t |
| ae (diphthong) | /iː/, /iə/ | m ea t |
| au (diphthong) | /ɔː/ | like aw in aw l |
| c (before a, o, u) | /k/ | c at |
| c (before e, i, y) | /s/ | c entre |
| ē | /iː/ | m e |
| ĕ | /ɛ/ | p e t |
| ei (diphthong) | /aɪ/ | h ei ght |
| g (before a, o, u) | /ɡ/ | g o |
| g (before e, i, y) | /d͡ʒ/ | g em |
| i | /ɪ/ | p i t |
| ō | /oʊ/ | n o te |
| ŏ | /ɒ/ | n o t |
| oe (diphthong) | /iː/, /iə/ | like ee in b ee |
| oi (not a diphthong) | /oʊ.ɪ/ | like owi in gr owi ng |
| ph | /f/ | like f |
| t | /t/ | t able |
| ū | /uː/ | br u te |
| ŭ | /ʌ/ | t u b |
| ui (not a diphthong) | /uː.ɪ/, /ʊ.ɪ/ | d oi ng |
| v | /v/ | v an |
| ȳ | /aɪ/ | c y pher |
| y̆ | /ɪ/ | c y nical |
Frequently Asked Questions
Is Botanical Latin the same as Classical Latin?
No. Botanical Latin is a technical language based on Neo-Latin. It has evolved to include specific scientific terms and incorporates many non-Latin words to describe modern biological structures.
How long does it take to learn Botanical Latin?
According to estimates by Alphonse Pyramus de Candolle, an English speaker with no prior experience in Latin-based languages would take about three months to learn it, while an Italian speaker might manage in one month.
Why isn't there a single way to pronounce botanical names?
Because many botanical names are derived from languages other than Latin or Greek—such as personal names—there is no single consistent pronunciation system that works for all names.
Can I use English to describe a new plant species?
While English is widely used in science, Botanical Latin remains the only language other than English officially accepted for the formal descriptions of new taxa under the International Code of Nomenclature.
What are "rosids" in relation to Botanical Latin?
"Rosids" is an informal English derivative of the Latin subclass name Rosidae. In modern classifications like APG IV, these terms are also used as rankless clade names.