Niels Jacobsen

Niels Jacobsen

Professor, emeritus

ORCID: 0000-0003-3932-1293

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  1. Published

    Crocus - Evolution and domestication

    Ørgaard, Marian & Jacobsen, Niels, 2008, Xth Symposium of the International Organisation of Plant Biosystematists. p. 17 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  2. Published

    Crocus in the northeastern Mediterranean region

    Ørgaard, Marian, Jacobsen, Niels & Heslop-Harrison, J. S., 2007, In: Chromosome Research. 15, Suppl. 1, p. 10 1 p.

    Research output: Contribution to journal › Conference abstract in journal › Research

  3. Published

    Cryptocoryne bangkaensis Bastmeijer, ein neuer Name für eine gut bekannte Cryptocoryne von Sumatra (Indonesien)

    Bastmeijer, J. D., Jacobsen, Niels & Bogner, J. (Translator), 2007, In: Aqua Planta. 32, p. 44-55 12 p.

    Research output: Contribution to journal › Journal article › Research

  4. Published

    Cryptocoryne crispatula Engler var. flaccidifolia N. Jacobsen im südlichen Thailand

    Jacobsen, Niels & Soochaloem, D., 2006, In: Aqua Planta. 31, 1, p. 16-23 8 p.

    Research output: Contribution to journal › Journal article › Communication

  5. Published

    Cryptocoryne ferruginea Engl. from Sekadau, West KAlimantan province, Indonesia

    Bastmeijer, J. D., Kishi, H., Takahashi, N., Wongso, S. & Jacobsen, Niels, 2013, In: The Aquatic Gardener. 26, 4, p. 33-38 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  6. Published

    Cryptocoryne fusca De Wit (Araceae), a new record for Sarawak

    Ipor, I. B., Tawan, C. S. & Jacobsen, Niels, 2006, In: Sarawak Museum Journal. 62, 83, p. 175-184 10 p.

    Research output: Contribution to journal › Journal article › Communication

  7. Published

    Cryptocoryne zaidiana Ipor & Tawan (Araceae), eine kürzlich neu beschriebene Art aus Sarawak (Malaysia)

    Ipor, I. B., Tawan, C. S. & Jacobsen, Niels, 2006, In: Aqua Planta. 31, 2, p. 52-61 10 p.

    Research output: Contribution to journal › Journal article › Communication

  8. Published

    Cryptocoryne of the Nam Lik watershed in northwestern Laos

    Andersen, T., Pedersen, O., Christensen, C. & Jacobsen, Niels, 2006, In: Aquatic Gardener. 19, 1, p. 24-32 9 p.

    Research output: Contribution to journal › Journal article › Communication

  9. Published

    Cryptocoryne aura (Araceae), a new species from West Kalimantan, Indonesia

    Wongso, S., Ipor, I. B., Tawan, C. S., Budianto, H., Bastmeijer, J. D. & Jacobsen, Niels, 2016, In: Willdenowia. 46, 2, p. 275-282 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  10. Published

    Cryptocoryne ciliata var. bogneri - eine neue tetraploide Varietät aus Sarawak

    Jacobsen, Niels, Bastmeijer, J. D., Jensen, Karen Rysbjerg & Ørgaard, Marian, 2019, In: Aqua Planta. 2, p. 52-63 6 p.

    Research output: Contribution to journal › Journal article › Research

  11. Published

    Cryptocoryne crispatula (Araceae) in Thailand seen with the help of AFLP glasses

    Jacobsen, Niels, Bastmeijer, J., Christensen, C., Idei, T., Lange, Conny Bruun Asmussen, Orabi, J., Sookchaloem, D., Toneatto, F. & Ørgaard, Marian, 2017, Abstract of 17th Flora of Thailand Conference: Taxonomic knowledge and a sustainable future. p. 143 1 p.

    Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Research

  12. Published

    Cryptocoryne crispatula var. Tonkinensis and var. Kubotae

    Jacobsen, Niels, Bastmeijer, J. D. & Ørgaard, Marian, 2017, In: The Aquatic Gardener. 30, 4, p. 24-31 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  13. Published

    Cryptocoryne crispatula var. tonkinensis und var. kubotae

    Jacobsen, Niels, Bastmeijer, J. D., Ørgaard, Marian & Bogner, J. (Translator), 2017, In: Aqua Planta. 3, p. 90-102 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  14. Published

    Cryptocoryne esquerionii (Araceae), a remarkable new species discovered by a citizen scientist in Zamboanga Peninsula, southwestern Philippines

    Mark, A. K. N., Reagan, J. T. V., Wongso, S. & Jacobsen, Niels, 2023, In: Nordic Journal of Botany. 2023, 3

    Research output: Contribution to journal › Journal article › Research › peer-review

  15. Published

    Cryptocoryne matakensis (Araceae, eine neue Art von den Anambas-Inseln (Indonesien)

    Bastmeijer, J. D., Nagasawa, K. & Jacobsen, Niels, 2014, In: Aqua Planta. 2, p. 64-71 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  16. Published

    Cryptocoryne nurii var. raubensis, a new calcicolousvariety from Pahang, Peninsular Malaysia

    Jacobsen, Niels, Bastmeijer, J. D., Ganapathy, H. B., Mangsor, K. N. A., Mansor, M., Othman, A. S., Rahman, S. N. A., Rosazlina, R. & Siow, J., 2015, In: The Aquatic Gardener. 28, 2, p. 32-43 12 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  17. Published

    Cryptocoryne wongsoi (Araceae), a new species from Sumatera, Indonesia

    Bastmeijer, J. D., Budianto, H., Ipor, I. B., Ørgaard, Marian & Jacobsen, Niels, 2016, In: Aroideana. 39, 2, p. 4-14 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  18. Published

    Cryptocoryne xbatangkayanensis (Araceae), a new hybrid from Sarawak

    Ipor, I. B., Ørgaard, Marian & Jacobsen, Niels, 2015, In: Willdenowia. 45, 2, p. 183-187 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  19. Published

    Cryptocoryne ×batangkayanensis (Araceae) und Bemerkungen zu einigen anderen Hybriden

    Jacobsen, Niels, Bastmeijer, J. D., Ipor, I., Jensen, Karen Rysbjerg, Wongso, S. & Ørgaard, Marian, 2016, In: Aqua Planta. 2, p. 54-66 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. Published

    Cryptocoryne hybrids (Araceae) 2: Two Cryptocoryne (Araceae) hybrids from southern Peninsular Malaysia

    Jacobsen, Niels, Bastmeijer, J. D., Jensen, Karen Rysbjerg, Othman, A. S. & Ørgaard, Marian, 2020, In: Aroideana. 43, 1&2, p. 240-254 15 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  21. Published

    Cryptocoryne hybrids (Araceae) 3: Hybrids between Cryptocoryne cordata and Cryptocoryne nurii from southern Peninsular Malaysia

    Jacobsen, Niels, Bastmeijer, J. D., Ganapathy, H., Ipor, I., Jensen, Karen Rysbjerg, Komala, T., Mangsor, K. N. A., Othman, A. S., Rosazlina, R., Siow, J. & Ørgaard, Marian, 2020, In: Aroideana. 43, 1&2, p. 255-284 30 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  22. Published

    Cryptocoryne hybrids (Araceae) 4: A Cryptocoryne hybrid from the Meratus mountains, South Kalimantan, Indonesia

    Wongso, S., Bastmeijer, J. D., Idei, T., Jensen, Karen Rysbjerg, Ørgaard, Marian & Jacobsen, Niels, 2020, In: Aroideana. 43, 1&2, p. 285-298 14 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  23. Published

    Cryptocoryne-Hybriden (Araceae): Cryptocoryne x ikezewaldiae und C. x agusii, zwei neue Hybriden aus West-Kalimantan, Indonesien

    Wongso, S., Bastmeijer, J. D., Hendrik, Jensen, Karen Rysbjerg, Kishi, H., Ørgaard, Marian, Takahashi, N. & Jacobsen, Niels, 2020, In: Aqua Planta. 45, 2, p. 44-57 14 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. Published

    Lagenandra keralensis und L. meeboldii

    Jacobsen, Niels, Bastmeijer, J. D., Wongso, S. & Ørgaard, Marian, 2019, In: Aqua Planta. 3, p. 84-91

    Research output: Contribution to journal › Journal article › Research

  25. Published

    Lagenandra ’Cora Bastmeijer’, an artificial hybrid between the Indian L. meeboldii and the Sri Lankan L. thwaitesii (Araceae)

    Bastmeijer, J. D. & Jacobsen, Niels, 2020, In: Aroideana. 43, 3&4, p. 54-58 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  26. Published

    A new Cryptocoryne species (Araceae) from the Schwaner mountains, West Kalimantan, Indonesia

    Wongso, S., Hendrik, Jensen, Karen Rysbjerg, Ørgaard, Marian & Jacobsen, Niels, 2020, In: Nordic Journal of Botany. 38, 4, 5 p., 02716.

    Research output: Contribution to journal › Journal article › Research › peer-review

  27. Published

    A new calcicolous variety of Cryptocoryne nurii Furtado (Araceae) from Pahang, Peninsular Malaysia

    Jacobsen, Niels, Bastmeijer, J. D., Ganapathy, H. B., Mangsor, K. N. A., Mansor, M., Sofiman Othman, A., Rahman, S. N. A., Rosazlina, R. & Siow, J., 2015, In: Malayan Nature Journal. 65, 4, p. 230-239 10 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  28. Published

    A new species of Cryptocoryne (Araceae) from Borneo

    Ipor, I. B., Tawan, C. S. & Jacobsen, Niels, 2005, In: Gardens' Bulletin, Singapore. 57, p. 1-6 6 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  29. Published

    A new tetraploid variety of Cryptocoryne ciliata (Araceae) from Sarawak

    Jacobsen, Niels, Bastmeijer, J. D., Jensen, Karen Rysbjerg & Ørgaard, Marian, 2018, In: Willdenowia. 48, 3, p. 425-432

    Research output: Contribution to journal › Journal article › Research › peer-review

  30. Published

    A new variety of Cryptocoryne crispatula Engl. (Araceae) from Thailand

    Jacobsen, Niels, Bastmeijer, J., Bongcheewin, B., Idei, T., Sookchaloem, D. & Ørgaard, Marian, 2015, In: Thai Forest Bulletin (Botany). 43, p. 104-110 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  31. Published

    A new variety of Cryptocoryne versteegii (Araceae) from Irian Jaya Tengah, Indonesia

    Jacobsen, Niels, Bastmeijer, J. D., Edwards, P. J., Johns, R. J., Taka-Hashi, N. & Wongso, S., 2014, In: Willdenowia. 44, 3, p. 385-391 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  32. Published

    A reassessment of the genus Barclaya (Nymphaeaceae) including three new species

    Jacobsen, Niels, Ganapathy, H., Ipor, I., Jensen, Karen Rysbjerg, Komala, T., Mangsor, K. N. A., Nordin, F. A., Othman, A. S., Rusly, R., Siow, J., Wongso, S. & Ørgaard, Marian, 2022, In: Nordic Journal of Botany. 2022, 5, 41 p., e03392.

    Research output: Contribution to journal › Journal article › Research › peer-review

  33. Published

    Araceae

    Heng, L., Guanghua, Z., Boyce, P. C., Murata, J., Hetterscheid, W. L. A., Bogner, J. & Jacobsen, Niels, 2010, Flora of China: Acoraceae through Cyperaceae. Zhengyi, W., Raven, P. H. & Deyuan, H. (eds.). Beijing: Science Press, Beijing, Vol. 23. p. 3-5 3 p.

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  34. Published

    Araceae

    Boyce, P. C., Sookchaloem, D., Hettterscheid, W. L. A., Gusman, G., Jacobsen, Niels, Idei, T. & Van Du, N., 2012, Flora of Thailand: Acoraceae & Araceae. The Forest Herbarium, Vol. 11, Part 2. p. 101-321 + Plates XLV-LVIII

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  35. Published

    Artificial hybrids between species of Lagenandra (Araceae)

    Bastmeijer, J. D. & Jacobsen, Niels, 2020, In: Aroideana. 43, 3&4, p. 59-96 38 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  36. Published

    Artificial hybrids in Cryptocoryne (Araceae) 3. Hybridization between species from Borneo

    Jacobsen, Niels, Bastmeijer, J. D., Idei, T., Ipor, I., Wongso, S. & Ørgaard, Marian, 2019, In: Aroideana. 42, 2&3, p. 57-90

    Research output: Contribution to journal › Journal article › Research › peer-review

  37. Published

    Artificial hybrids in Cryptocoryne (Araceae) 4. Hybridization between species from Malay Peninsula and Borneo

    Jacobsen, Niels, Bastmeijer, J. D., Idei, T., Wongso, S. & Ørgaard, Marian, 2019, In: Aroideana. 42, 2&3, p. 91-118

    Research output: Contribution to journal › Journal article › Research › peer-review

  38. Published

    Artificial hybrids in Cryptocoryne (Araceae) 5. Hybridization with species from Sumatera, Indonesia

    Jacobsen, Niels, Bastmeijer, J. D., Waser, A., Wongso, S. & Ørgaard, Marian, 2019, In: Aroideana. 42, 2&3, p. 119-138

    Research output: Contribution to journal › Journal article › Research › peer-review

  39. Published

    Artificial hybrids in Cryptocoryne (Araceae) 6. Hybridization between various species

    Jacobsen, Niels, Bastmeijer, J. D., Idei, T., Wongso, S. & Ørgaard, Marian, 2020, In: Aroideana. 43, 1&2, p. 225-239 15 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  40. Published

    Artificial hybrids in Cryptocoryne (Araceae). 1. Hybridization between Sri Lankan species within the 2n = 28 chromosome group

    Jacobsen, Niels & Ørgaard, Marian, 2019, In: Aroideana. 42, 1, p. 76-106

    Research output: Contribution to journal › Journal article › Research › peer-review

  41. Published

    Artificial hybrids in Cryptocoryne (Araceae). 2. Hybridization between species of the Malay Peninsula

    Jacobsen, Niels, Bastmeijer, J. D., Bin Othman, A. S., Sookchaloem, D. & Ørgaard, Marian, 2019, In: Aroideana. 42, 1, p. 107-137

    Research output: Contribution to journal › Journal article › Research › peer-review

  42. Published

    Complex metabolism of aromatic glucosinolates in Pieris rapae caterpillars involving nitrile formation, hydroxylation, demethylation, sulfation, and host plant dependent carboxylic acid formation

    Agerbirk, Niels, Olsen, C. E., Poulsen, E., Jacobsen, Niels & Hansen, Paul Robert, 2010, In: Insect Biochemistry and Molecular Biology. 40, 2, p. 126-137 12 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  43. Published

    Crocus cartwrightianus on the Attica Peninsula

    Jacobsen, Niels & Ørgaard, Marian, 2004, In: Acta Horticulturae. p. 65-69 5 p.

    Research output: Contribution to journal › Conference article › Research › peer-review

  44. Published

    Cryptocoryne: Fischer ex Wydler, Linnaea 5:428. 1830.

    Heng, L. & Jacobsen, Niels, 2010, Flora of China: Acoraceae through Cyperaceae. Zhengyi, W., Raven, P. H. & Deyuan, H. (eds.). Beijing: Science Press, Beijing, Vol. 23. p. 20-22 3 p.

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  45. Published

    Cryptocoryne of peninsular Malaysia

    Othman, A. S., Jacobsen, Niels & Mansor, M., 2009, Penerbit Universiti Sains Malaysia. 102 p.

    Research output: Book/Report › Book › Research › peer-review

  46. Published

    Cryptocoryne x batangkayensis and notes on some other hybrids

    Jacobsen, Niels, Bastmeijer, J. D., Ipor, I. B., Jensen, Karen Rysbjerg, Wongso, S. & Ørgaard, Marian, 2016, In: The Aquatic Gardener. 29, 4, p. 37-45 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  47. Published

    Cryptocorýne xpurpúrea Ridley nothovar. borneoensis N. Jacobsen, Bastmeijer & Y. Sasaki (Araceae), eine neue Hybridvarietät aus Kalimantan

    Jacobsen, Niels, Bastmeijer, J. D. & Sasaki, Y., 2002, In: Aqua Planta. 27, 4, p. 152-154 3 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  48. Published

    Der ¤Cryptocorýne cordáta Griffith: Komplex (Araceae) in Malesien

    Jacobsen, Niels, 2002, In: Aqua Planta. 27, 4, p. 150-151 2 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  49. Published

    Die Bestäubung der Gattung Cryptocoryne (Araceae)

    Jacobsen, Niels & Ørgaard, Marian, 2020, In: Aqua Planta. 45, 1, p. 4-19 16 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  50. Published

    Discovery through citizen science: Cryptocoryne paglaterasiana (Araceae), a new endangered species from Tampilisan, Zamboanga del Norte, Western Mindanao

    Naive, M. A. K., Lagud, Y. J. & Jacobsen, Niels, 2022, In: Taiwania. 67, 4, p. 539-543 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

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