--- title: "Why Plant Scientific Names Change: Understanding Taxonomy Revisions" description: "Ever wondered why plant scientific names like Mother-in-law's Tongue (Sansevieria) change to Dracaena? Discover the history of botanical naming, from early polynomials to the modern binomial system, and how DNA research continually refines our understanding of plant family trees." url: "https://getplanta.com/discover/taxonomyrevision" published: "2025-11-20T08:44:31.023Z" modified: "2026-10-06T10:35:53.594Z" author: "Planta" image: "https://images.getplanta.com/v1/resize/public/content/y6JOm67YSIiMrUxhNTffbg.webp?size=large" --- # Why Plant Scientific Names Change: Understanding Taxonomy Revisions ## Why has the name of your plant changed? Have you ever been confused when a plant’s scientific name suddenly changes? It can feel like your favorite plant is having a mid-life identity crisis. The Mother-in-law's Tongue, for instance, has been known as _Sansevieria_ for as long as most of us can remember, but now it’s suddenly grouped with _Dracaena_. Why does this happen? Is it just scientists trying to keep us on our toes? Let’s dig into the history of how we scientifically name plants. ![](https://images.getplanta.com/v1/resize/public/content/sKWxzaLDSx6nlTCbdtRNmg.webp?size=large) ## A brief history lesson on botanical names ### Polynomials In the early days of Western botany, plants were known to the public by local common names, while scientists identified them using long, descriptive Latin phrases known as **polynomials**. Imagine trying to talk about a plant called _Albus erubesco major comosus esculentus_. While that's a made-up example, it translates to "large, white, slightly blushing, hairy, and edible." Helpful for identification? Maybe. Easy to use in a conversation? Definitely not. Another problem was that these polynomials weren't standardized. Different botanists could use different descriptive combinations for the exact same plant. A real-world example of this linguistic mouthful is the original name for the tomato: _Solanum caule inermi herbaceo, foliis pinnatis incisis_. This literally means "Solanum with the smooth herbaceous stem and incised pinnate leaves." ### Binomial system In the 18th century, Carl Linnaeus simplified this chaos by popularizing the **binomial system**. Instead of a long paragraph, every plant was given just two names: a **Genus** and a **species epithet**. Today, that complicated tomato is simply **_Solanum lycopersicum_**. Together, the two parts of the name refer to the tomato species. However, the genus **_Solanum_** , is a group that also contains many other species. Think of the genus like a last name that comes first. It tells you these plants are all closely related cousins. For example **_Solanum tuberosum_**, Potato and **_Solanum melongena_**, Eggplant. The binomial system uses two names, but it is actually part of a much larger system that categorizes plants into a massive family tree. While we only use the genus and species for the official name when we write them, they belong to even larger groups that show deeper ancestral connections. Thanks to Linnaeus, we use a standardized, two-part scientific name that is recognized by gardeners and scientists worldwide. ### Morphology and the Human Factor For centuries, plant classification was based primarily on morphology (physical appearance), with a specific focus on reproductive anatomy, the flowers and seeds. If a new plant had flowers that looked like a Lily, it was put in the Lily family. However, this system has a flaw, the human factor. Relying on visual observation is subjective. Just because two plants look alike does not mean they are closely related. This is often the result of convergent evolution, where unrelated species develop similar traits to survive in similar environments (like how both sharks and dolphins have fins, even though one is a fish and the other a mammal). ![](https://images.getplanta.com/v1/resize/public/content/OcnICK2xSYqrR7d_G7Qdrw.webp?size=large) ## When DNA became more interesting than reproductive systems In the late 20th and early 21st centuries, the field was revolutionized by DNA sequencing and phylogenetics. Instead of just looking at parts of the plant, scientists could now look at the plant’s genetic instruction manual. This technology definitely shook things up. As our genetic map of the plant kingdom becomes more accurate. Due to this, we also see popular houseplant genera being reorganized. This usually involves: - **Clumping:** Moving species from one genus into another genus. For example, the Mother-in-law’s Tongue (previously considered _Sansevieria_) was moved into _Dracaena_ because DNA showed it was essentially a succulent _Dracaena_ rather than its own genus. - **Splitting:** Moving species out of a genus into one or several new ones. For example, many plants in the genus _Senecio_ were split into _Curio_ (like String-of-Pearls), _Kleinia_, and _Caputia_. ### The Ever-Evolving Family Tree While it can be frustrating to relearn names for old favorites, these changes ensure our classification system reflects the true evolutionary history of the plant kingdom as we discover it. Science is always evolving as we gradually learn more about how plants truly relate to each other. So, the next time you see a new name at the garden center, remember it’s just us getting to know the plant’s family tree a little better. If you see an old name on social media or a nursery tag, be kind! It’s hard for everyone, including the pros, to keep up. And remember, your plant is still just as beautiful and interesting, no matter what it’s called! ### A brief selection of new names for old favorites: - Rosemary, _Rosmarinus officinalis_ → **_Salvia rosmarinus_** - Mother-in-law's tongues, _Sansevieria_ → **_Dracaena_** - Russian Sage, _Perovskia atriplicifolia_ → **_Salvia yangii_** - Lindheimer's beeblossom, _Gaura lindheimeri_ → **_Oenothera lindheimeri_** - String-of-Pearls, _Senecio rowleyanus_ → **_Curio rowleyanus_** - most of the _Calathea_ we're used to grow → **_Goeppertia_** - Fishbone Cactus, _Epihyllum anguliger_ → **_Disocactus anguliger_** ## よくある質問 ### Why do scientific plant names sometimes change? Scientific plant names change as our understanding of plant relationships evolves. This is often due to new research, particularly DNA sequencing, which reveals more accurate genetic connections between species. ### What was the original system for naming plants before the binomial system? Before the binomial system, plants were identified using long, descriptive Latin phrases called polynomials. These were often unstandardized and difficult to use in conversation, like Albus erubesco major comosus esculentus. ### Who developed the binomial system for plant classification? Carl Linnaeus popularized the binomial system in the 18th century. This system assigns every plant two names: a genus and a species epithet, simplifying identification worldwide. ### How did DNA sequencing impact plant classification? DNA sequencing revolutionized plant classification by allowing scientists to examine a plant's genetic instruction manual. This led to more accurate classifications, often resulting in species being moved between genera through "clumping" or "splitting". ### What are "clumping" and "splitting" in plant taxonomy? "Clumping" is when species from one genus are moved into another, such as Mother-in-law's Tongue (Sansevieria) being moved into Dracaena. "Splitting" is when species are moved out of a genus into one or several new ones, like many plants from Senecio being split into Curio or Kleinia. ### Does a plant's care change when its scientific name is updated? No, a plant's care does not change when its scientific name is updated. The plant remains the same, only our classification and understanding of its evolutionary history have become more accurate. --- _iOSおよびAndroid向け植物ケアアプリ、Planta (https://getplanta.com)。アプリをダウンロード: https://getplanta.com/download_