Ecological factors determining the distribution patterns of Cyrtanthus nutans in North -Western KwaZulu-Natal


  • Lynne Ruddle Private
  • Erika Van Zyl Grass and Forage Scientific Research Services, Dundee Research Station, KwaZulu-Natal Department of Agriculture and Rural Development
  • Dr Jorrie Jordaan Private



Autecology, Dundee fire lily, plant species distribution


Background: Cyrtanthus nutans R.A.Dyer is a range-restricted species occurring in northwestern KwaZulu-Natal, South Africa and in Eswatini, and is currently classified as Vulnerable in accordance with the IUCN criteria. Land transformation and disturbance of natural habitats have resulted in an ever-increasing fragmentation of the species’ range.
Objectives: This manuscript provides a description of some of the abiotic and biotic factors associated with the remaining natural populations of C. nutans in the Sour Sandveld and Moist Tall Grassland Bioresource Groups of northwestern KwaZulu-Natal.
Methods: An investigation was conducted in the northwestern KwaZulu-Natal region to determine the effect that key ecological and anthropological determinants have in influencing the distribution and survival of the species. Data collected included sites of occurrence, estimated population numbers, elevation, ecological factors (soils/geology, climate, veld composition), and human/animal activities.
Results: The northwestern KwaZulu-Natal C. nutans populations were found to occur primarily in untransformed veld within the Moist Tall Grassveld, Dry Highland Sourveld and Sour Sandveld Bioresource Groups. It occurs largely on gradients of < 10% on mid- to lower terrain slopes and predominantly within an altitude range of between 1 100 and 1 300 m a.m.s.l.
Conclusion: C. nutans occurs in a narrow altitudinal range and has a preference for soils with high nitrogen and organic carbon and low phosphorus and acidity levels.


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Agrometeorology (ARC-ISCW Agro-Climatology Data Base), 2019, ARC-Institute for Soil, Climate and Water, Pretoria, South Africa.

Camp, K.G.T. & Hardy, M.B., 1999, In: Hardy, M.B., & Hurt, C.R., 1999, Veld in KwaZulu-Natal, Agricultural Production Guidelines for KwaZulu-Natal, Pietermaritzburg: KwaZulu-Natal Department of Agriculture.

Camp, K.G.T., 1999, A bioresource classification for KwaZulu-Natal, South Africa.

Dyer, R.A., 1954, Cyrtanthus. The Flowering Plants of Africa, 30: t 1182.

Ezemvelo KZN Wildlife, 2009, Bioresource topography maps, Ezemvelo KZN Wildlife, Pietermaritzburg, South Africa.

Macdonald, I.A.W., 1989, Man’s role in changing the face of southern Africa, in Biotic Diversity in Southern Africa: Concepts and Conservation. Oxford University Press, Cape Town, pp. 51–72.

Manson, A.D. & Roberts, V.G., 2000, Analytical methods used by the soil fertility and analytical services section. Republic of South Africa, Pietermaritzburg.

McNeil, G., 1967, ‘A brief introduction to Cyrtanthus’, Journal of the Royal Horticultural Society: XCII (4), 180–183.

Reid, C., Dyer, R.A. & American Plant Life Society (La Jolla), 1984, ‘A review of the southern African species of Cyrtanthus’, American Plant Life Society.

Ruddle, L.M., 2018, Ecological characterisation and effects of fire and grazing on Cyrtanthus nutans (R.A.Dyer) in North-Western Kwazulu-Natal, South Africa, Masters dissertation.

SANBI, 2020, Statistics: Red List of South African Plants version 2020.1, available at (Accessed: 13 August 2020).

Scott-Shaw, R., 1999, Rare and threatened plants of KwaZulu-Natal and neighbouring regions, KwaZulu-Natal Nature Conservation Service.

Von Staden, L., Raimondo, D. & Dayaram, A., 2013, Taxonomic research priorities for the conservation of the South African flora, South African Journal of Science, 109(3-4), 1–10,




How to Cite

Ruddle, L., Van Zyl, E., & Jordaan, J. J. (2022). Ecological factors determining the distribution patterns of Cyrtanthus nutans in North -Western KwaZulu-Natal. Bothalia, African Biodiversity & Conservation, 52(1).



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