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Your Class 11 Plant Kingdom chapter has one sentence about George Bentham and Joseph Dalton Hooker, and exam questions love it. Behind that sentence are two botanists who spent about two decades defining plant genera from the specimens at Kew. This post explains what a natural system is, who the two men were, and how to answer the classification questions that come from their work.
What does NCERT say about Bentham and Hooker?
In the NCERT Class 11 Plant Kingdom chapter, the story runs in three steps.
Artificial systems came first. They used gross superficial characters such as habit, colour, number and shape of leaves, or, in Linnaeus' system, the androecium. NCERT calls these artificial because they separated closely related species and gave equal weight to vegetative and sexual characters, even though vegetative characters are more easily affected by environment.
Natural systems came next, based on natural affinities and considering internal features such as ultrastructure, anatomy, embryology and phytochemistry as well as external ones. NCERT says such a classification for flowering plants was given by George Bentham and Joseph Dalton Hooker.
Phylogenetic systems, based on evolutionary relationships, are what is accepted at present.
That three-step order is the answer to most questions on this topic.
Who was George Bentham?
The Royal Society's 1885 obituary notice is the authoritative account. Bentham was born on 22 September 1800 at Stoke, near Portsmouth. He was taught by private tutors and never went to school or college. As a boy of six or seven he could converse in French, German and Russian. He was drawn to botany by De Candolle's Flore Française, whose analytical tables for identifying species fascinated him.
He trained for law for some years before botany became his life's work. In 1854 he planned to give up botany and donate his herbarium and library to Kew, but the director, Sir William Hooker, persuaded him to keep working by offering him the use of Kew's library and herbarium. Bentham then wrote a series of colonial floras, including the seven-volume Flora Australiensis, completed in 1870. He was President of the Linnean Society from 1863 to 1874, received a Royal Medal in 1859 and was elected a Fellow of the Royal Society in 1862. He died on 10 September 1884.
The obituary describes his particular gift as an insight into "the relative value of characters" for practical classification. That phrase is the heart of a natural system.
Who was Joseph Dalton Hooker?
Joseph Hooker (1817-1911) was William Hooker's son. The Darwin Correspondence Project at Cambridge describes him as Charles Darwin's closest friend: about 1,400 letters passed between them, around 10 per cent of Darwin's surviving correspondence. After ten years as assistant director of the Royal Botanic Gardens, Kew, Hooker succeeded his father as director in 1865. It was Hooker, with Charles Lyell, who arranged the simultaneous publication of Darwin's and Wallace's papers in 1858.
Indian students have a special reason to know him. He wrote The Flora of British India, a seven-volume work whose first volume is dated 1872.
What was Genera Plantarum?
Their joint work was Genera Plantarum, written in Latin. Its full title says the genera were defined chiefly from specimens kept in the Kew herbaria. The volumes held by the Internet Archive run from 1862 to a final part dated 1883. The Royal Society obituary calls it the crowning work of Bentham's life and says it occupied him until the spring of 1883.
The working method is what matters for you. As the title says, they defined each genus from specimens they could examine, rather than from one character chosen in advance. NCERT classes the result as a natural system because it weighs many features, internal as well as external.
How do you answer exam questions on classification systems?
Worked example. A question asks: "A system groups plants by number of stamens. Another uses anatomy, embryology and phytochemistry along with external features. Name each type and give one example."
Grouping by stamen number uses one or a few chosen characters: an artificial system, as in Linnaeus' androecium-based system.
Using many features including internal ones: a natural system, as given by Bentham and Hooker.
Common mistakes to avoid:
Calling Bentham and Hooker's system phylogenetic. NCERT places it under natural systems. Phylogenetic systems are based on evolutionary relationships.
Mixing up numerical taxonomy. NCERT describes numerical taxonomy as giving each character equal importance and processing hundreds of characters by computer. That is a modern method, not Bentham and Hooker's.
Forgetting cytotaxonomy and chemotaxonomy. These use chromosome information and plant chemistry, and NCERT lists them as current aids.
What can a student take from their way of working?
Weigh evidence, do not just count it. Bentham's skill was judging which characters matter.
Check everything yourself. The obituary quotes his early rule of admitting no observation he had not been able to verify himself.
Use a shared collection. One well-kept herbarium made a consistent system possible.
If plant groups such as gymnosperms and angiosperms still blur together, the Fermi Concept Library explains every biology concept in one place. For the full NEET treatment, read our guide to the plant kingdom from algae to angiosperms, and for the artificial system that came before, our post on Carl Linnaeus.
Next step: write one line each defining artificial, natural and phylogenetic systems, with one example of each, and check them against your NCERT page.
