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Botanical Classification of Didymosperma gracilis
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Botanical Classification of Didymosperma gracilis

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Questions and Answers

What is the primary issue identified with the type specimen of Didymosperma gracilis?

  • The seeds are not well preserved.
  • It contains too many leaves for identification.
  • It has incomplete type material. (correct)
  • It shows perfect match with Arenga species.

    • Which genus was questioned for the existence of Didymosperma gracilis?

  • Griffithia
  • Roxburghia
  • Arenga
  • Wallichia (correct)

    • How many species of Wallichia are found in India according to the content?

  • Five species (correct)
  • Twenty-four species
  • Three species
  • Eight species

    • What characteristic of the fruiting branch is noted in the description of the type specimen?

    <p>It is terminal with three rachillae.</p> Signup and view all the answers

    What is considered a synonym of Didymosperma gracilis?

    <p>Wallichia nana</p> Signup and view all the answers

    What is noted about the leaves of the type specimen?

    <p>They are fibrous with a damaged ligule.</p> Signup and view all the answers

    Which of the following is NOT mentioned as part of the taxonomic treatment for Wallichia nana?

    <p>Mehmud &amp; Roy</p> Signup and view all the answers

    Which of the following species is NOT mentioned as part of the Arenga genus in India?

    <p>A.renukae</p> Signup and view all the answers

    What is the notable feature of the seeds associated with the type specimen?

    <p>They are brown and elliptic-curved.</p> Signup and view all the answers

    What type of data was collected in the study related to Didymosperma gracilis?

    <p>Fresh collections in different stages</p> Signup and view all the answers

    In which year was Didymosperma gracilis first described by Hook.f.?

    <p>1894</p> Signup and view all the answers

    In which location are the three species of Arenga mentioned to occur?

    <p>Northeast India</p> Signup and view all the answers

    Which plant is associated with the type locality of Didymosperma gracilis?

    <p>Dafla Hills, Arunachal Pradesh</p> Signup and view all the answers

    What botanical classification does Didymosperma gracilis fall under?

    <p>Family Arecaceae</p> Signup and view all the answers

    Which option lists a synonym previously used for Wallichia nana?

    <p>Both A and C</p> Signup and view all the answers

    Which characteristic of Wallichia nana is depicted in the provided figure?

    <p>Young fruits</p> Signup and view all the answers

    What is the title of the work authored by Henderson that focuses on Wallichia?

    <p>Revision of Wallichia</p> Signup and view all the answers

    Which author conducted anatomical studies on Wallichia nana?

    <p>Selim Mehmud</p> Signup and view all the answers

    In what year was the specimen collected in Arunachal Pradesh, Dibang Valley?

    <p>1999</p> Signup and view all the answers

    Which organization is associated with the herbarium consultations mentioned in the acknowledgements?

    <p>Botanical Survey of India</p> Signup and view all the answers

    What is the purpose of the work authored by Pillai, Riyas, and Sabu in 2020?

    <p>Review of Arenga species in India</p> Signup and view all the answers

    Which palm species from Assam is discussed by Mehmud and Roy in their 2021 publication?

    <p>Wallichia nana</p> Signup and view all the answers

    What geographical location does the specimen collected on 03.09.2019 originate from?

    <p>Tinsukia, Assam</p> Signup and view all the answers

    Which volume of 'Flora of British India' was authored by H.J. Hooker?

    <p>Volume 6</p> Signup and view all the answers

    What is Didymosperma gracilis classified as in relation to Wallichia nana?

    <p>A synonym</p> Signup and view all the answers

    What year was Didymosperma gracilis first described?

    <p>1894</p> Signup and view all the answers

    What habitat is associated with Didymosperma gracilis?

    <p>Daphla Hills</p> Signup and view all the answers

    Which of the following characteristics do Didymosperma gracilis and Wallichia nana share?

    <p>Similar size and nature of leaflets</p> Signup and view all the answers

    What is the diameter range of the stem noted for Didymosperma gracilis?

    <p>13–60 cm</p> Signup and view all the answers

    Which genera were referenced alongside Didymosperma in relation to northeastern India?

    <p>Arenga</p> Signup and view all the answers

    Which region was the collection of Didymosperma gracilis made from?

    <p>Arunachal Pradesh</p> Signup and view all the answers

    What is the primary focus of the document?

    <p>Taxonomy and nomenclature</p> Signup and view all the answers

    Study Notes

    Didymosperma gracilis is a synonym of Wallichia nana

    • Didymosperma gracilis was described by Hooker in 1894, based on Booth’s collection from Dafla Hills in Arunachal Pradesh.
    • The type specimen of D. gracilis shows characteristics that align with Wallichia nana.
    • D. gracilis is being merged as a synonym of W. nana based type material, fresh collections, and comparisons with other previously identified and related species.

    Wallichia Nana

    • Wallichia nana was first described by Griffith in 1845.
    • The species has been reclassified and renamed multiple times, including:
      • Blancoa nana by Kuntze (1891)
      • Harina nana by Griffith (1850)
      • Arenga nana by Moore (1960).
    • The species is found in India, particularly in the states of Arunachal Pradesh, Assam, and Manipur.
    • The plant has a distinct habit, habitat, size, leaflet structure, and fruit characteristics.
    • Leaflets are linear, stem diameter ranges from 13–60 cm

    Arenga

    • There are three species of the genus Arenga found in northeastern India:
      • A. micrantha in Sikkim and Arunachal Pradesh
      • A. obtusifolia in Arunachal Pradesh
      • A. westerhoutii in Arunachal Pradesh

    Key Features of W. nana

    • The plant has a terminal fruiting branch with three rachillae
    • Fruits are elliptic-oblong with a persistent perianth
    • Seeds are brown, elliptic-curved, and concavo-convex
    • The embryo is in a central position within the seeds.

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    Description

    Explore the botanical classification of Didymosperma gracilis and its synonymy with Wallichia nana. This quiz covers the historical descriptions, reclassifications, and key characteristics of both species as well as their habitats. Test your knowledge on the botanical categorization and species comparison in India.

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