Gladiolus filiformis Goldblatt & J.C.Manning
Status and Criteria
Near Threatened D2
|N. Hahn & L. von Staden|
|A range-restricted (EOO 287 km²), but locally very abundant species that is not currently declining. An estimated four to ten locations are potentially threatened by habitat loss to mining and overgrazing.|
|Not endemic to South Africa|
|Makadima Mountains between Lobatse and Zeerust.|
Habitat and Ecology
|Carletonville Dolomite Grassland, Zeerust Thornveld|
|Grassland and scrubland on hill slopes and plateaus.|
|Plants at the type locality are potentially threatened by overgrazing (herds of goats were observed in the area), as well as infrastructure development related to radio towers and pipelines (Hahn 2013, Hahn and Roux 2014) at two others. There is also a potential threat of habitat loss to mining.|
This species was known for 33 years from only the type collection, from a remote area of North West Province near the border with Botswana. It was thought to be a rare, localized endemic. Field surveys between 2010 and 2013 found the species to be locally abundant, with the population estimated to be well in excess of 100 000 mature individuals, and not declining. Field observations indicate that if flowers prolifically during years of good rainfall, but most of the population remains dormant during dry years, so that it appears to be rare.
Status and Criteria
Citation/Red List version
|Gladiolus filiformis Goldblatt & J.C.Manning||Critically Rare ||Raimondo et al. (2009)|
Goldblatt, P. and Manning, J.C. 1998. Gladiolus in southern Africa. Fernwood Press, Vlaeberg.
Hahn, N. 2013. Rare, endangered and endemic flora of the North West Province. Unpublished Report to the Department of Economic Development, Conservation and Tourism, North West Provincial Government.
Hahn, N. and Roux, H. 2014. Gladiolus filiformis, a poorly known species from North West Province, South Africa. Bothalia - African Biodiversity & Conservation 44(1):1-4.
Raimondo, D., von Staden, L., Foden, W., Victor, J.E., Helme, N.A., Turner, R.C., Kamundi, D.A. and Manyama, P.A. 2009. Red List of South African Plants. Strelitzia 25. South African National Biodiversity Institute, Pretoria.
|Hahn, N. & von Staden, L. 2016. Gladiolus filiformis Goldblatt & J.C.Manning. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2017/04/24|