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Questions and Answers
What is the primary issue identified with the type specimen of Didymosperma gracilis?
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?
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?
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?
What characteristic of the fruiting branch is noted in the description of the type specimen?
What is considered a synonym of Didymosperma gracilis?
What is considered a synonym of Didymosperma gracilis?
What is noted about the leaves of the type specimen?
What is noted about the leaves of the type specimen?
Which of the following is NOT mentioned as part of the taxonomic treatment for Wallichia nana?
Which of the following is NOT mentioned as part of the taxonomic treatment for Wallichia nana?
Which of the following species is NOT mentioned as part of the Arenga genus in India?
Which of the following species is NOT mentioned as part of the Arenga genus in India?
What is the notable feature of the seeds associated with the type specimen?
What is the notable feature of the seeds associated with the type specimen?
What type of data was collected in the study related to Didymosperma gracilis?
What type of data was collected in the study related to Didymosperma gracilis?
In which year was Didymosperma gracilis first described by Hook.f.?
In which year was Didymosperma gracilis first described by Hook.f.?
In which location are the three species of Arenga mentioned to occur?
In which location are the three species of Arenga mentioned to occur?
Which plant is associated with the type locality of Didymosperma gracilis?
Which plant is associated with the type locality of Didymosperma gracilis?
What botanical classification does Didymosperma gracilis fall under?
What botanical classification does Didymosperma gracilis fall under?
Which option lists a synonym previously used for Wallichia nana?
Which option lists a synonym previously used for Wallichia nana?
Which characteristic of Wallichia nana is depicted in the provided figure?
Which characteristic of Wallichia nana is depicted in the provided figure?
What is the title of the work authored by Henderson that focuses on Wallichia?
What is the title of the work authored by Henderson that focuses on Wallichia?
Which author conducted anatomical studies on Wallichia nana?
Which author conducted anatomical studies on Wallichia nana?
In what year was the specimen collected in Arunachal Pradesh, Dibang Valley?
In what year was the specimen collected in Arunachal Pradesh, Dibang Valley?
Which organization is associated with the herbarium consultations mentioned in the acknowledgements?
Which organization is associated with the herbarium consultations mentioned in the acknowledgements?
What is the purpose of the work authored by Pillai, Riyas, and Sabu in 2020?
What is the purpose of the work authored by Pillai, Riyas, and Sabu in 2020?
Which palm species from Assam is discussed by Mehmud and Roy in their 2021 publication?
Which palm species from Assam is discussed by Mehmud and Roy in their 2021 publication?
What geographical location does the specimen collected on 03.09.2019 originate from?
What geographical location does the specimen collected on 03.09.2019 originate from?
Which volume of 'Flora of British India' was authored by H.J. Hooker?
Which volume of 'Flora of British India' was authored by H.J. Hooker?
What is Didymosperma gracilis classified as in relation to Wallichia nana?
What is Didymosperma gracilis classified as in relation to Wallichia nana?
What year was Didymosperma gracilis first described?
What year was Didymosperma gracilis first described?
What habitat is associated with Didymosperma gracilis?
What habitat is associated with Didymosperma gracilis?
Which of the following characteristics do Didymosperma gracilis and Wallichia nana share?
Which of the following characteristics do Didymosperma gracilis and Wallichia nana share?
What is the diameter range of the stem noted for Didymosperma gracilis?
What is the diameter range of the stem noted for Didymosperma gracilis?
Which genera were referenced alongside Didymosperma in relation to northeastern India?
Which genera were referenced alongside Didymosperma in relation to northeastern India?
Which region was the collection of Didymosperma gracilis made from?
Which region was the collection of Didymosperma gracilis made from?
What is the primary focus of the document?
What is the primary focus of the document?
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.
