Huernia namaquensis Pillans

@book{cullen2011european,

title = {The European garden flora flowering plants: a manual for the identification of plants cultivated in Europe, both out-of-doors and under glass},

author = {James Cullen and Sabina G Knees and Suzanne H Cubey and JMH Shaw},

year  = {2011},

date = {2011-01-01},

urldate = {2011-01-01},

volume = {1},

publisher = {Cambridge University Press},

keywords = {},

pubstate = {published},

tppubtype = {book}

}

@book{de2007stapeliads,

title = {Stapeliads of southern Africa and Madagascar, Peter V. Bruyns, Umdaus Press, Hatfield, 600 pp in 2 Hard Cover Volumes, ISBN 1-919766-37-5 and-38-3, R1400-00, Email: umdaus@ succulents. net},

author = {AT De Villiers},

year  = {2007},

date = {2007-01-01},

urldate = {2007-01-01},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {book}

}

@book{germishuizen2003plants,

title = {Plants of southern Africa: an annotated checklist},

author = {Gerrit Germishuizen and NL2003 Meyer and others},

year  = {2003},

date = {2003-01-01},

urldate = {2003-01-01},

volume = {14},

publisher = {National Botanical Institute Pretoria},

keywords = {},

pubstate = {published},

tppubtype = {book}

}

@book{albers2002illustrated,

title = {Illustrated Handbook of Succulent Plants: Asclepiadaceae: Asclepiadaceae},

author = {Focke Albers and Ulrich Meve},

year  = {2002},

date = {2002-01-01},

urldate = {2002-01-01},

volume = {4},

publisher = {Springer Science \& Business Media},

keywords = {},

pubstate = {published},

tppubtype = {book}

}

@book{goldblatt2000cape,

title = {Cape plants: a conspectus of the Cape flora of South Africa.},

author = {Peter Goldblatt and John Manning and others},

year  = {2000},

date = {2000-01-01},

publisher = {National Botanical Institute},

keywords = {},

pubstate = {published},

tppubtype = {book}

}

@book{luckhoff1952stapelieae,

title = {The Stapelieae of Southern Africa},

author = {Carl August L\"{u}ckhoff},

year  = {1952},

date = {1952-01-01},

urldate = {1952-01-01},

publisher = {AA Balkema},

keywords = {},

pubstate = {published},

tppubtype = {book}

}