Conophytum bolusiae subsp. primavernum

Taxonomy
Scientific Name
Conophytum bolusiae Schwantes subsp. primavernum S.A.Hammer
Higher Classification
Dicotyledons
Family
AIZOACEAE
National Status
Status and Criteria
Vulnerable D2
Assessment Date
2016/06/06
Assessor(s)
A.J. Young & L. von Staden
Justification
A locally abundant, but range-restricted subspecies (EOO, AOO <1 km²) that is potentially threatened by succulent collecting and habitat degradation.
Distribution
Endemism
South African endemic
Provincial distribution
Northern Cape
Range
Richtersveld, Uitspanpoort.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Lekkersing Succulent Shrubland
Description
Vertical fissuers in quartz ridges in sheltered kloofs in Lekkersing Succulent Shrubland.
Threats
This taxon is potentially threatened by succulent collecting. It is not highly-sought after, and hence not particularly targeted by collectors, but the subpopulation occurs in an easily accessible site, next to a road, and may be targeted by opportunistic succulent collectors, which are clearing out many areas in the Richtersveld of their succulent plants (P.C.V. van Wyk pers. obs.). In addition, this site occurs in an area severely degraded as a result of livestock grazing. This taxon is not grazed, and its particular habitat offers it some protection against the effects of erosion and trampling. However, overgrazing has significantly reduced shrub cover in large parts of the Richtersveld. This taxon is shade dependent, and individuals exposed to direct sunlight as a result of a loss of shrub cover may suffer. Most plants are however sheltered by rocky overhangs, and is not particularly vulnerable to loss of nurse-shrubs.
Population

Locally very abundant in suitable habitat. Population size estimated to be more than 5000 plants.


Population trend
Stable
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Conophytum bolusiae Schwantes subsp. primavernum S.A.HammerRare 2015.1
Conophytum bolusiae Schwantes subsp. primavernum S.A.HammerLeast Concern Raimondo et al. (2009)
Bibliography

Hammer, S. 2002. Dumpling and his wife: New view of the genus Conophytum. EAE Creative Colour, Norwich.


Hammer, S.A. 1993. The genus Conophytum: A conograph. Succulent Plant Publications, Pretoria.


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.


Citation
Young, A.J. & von Staden, L. 2016. Conophytum bolusiae Schwantes subsp. primavernum S.A.Hammer. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2017/05/27

Comment on this assessment Comment on this assessment
Distribution map

© A.J. Young


Search for images of Conophytum bolusiae subsp. primavernum on iSpot