Literatur

@book{cullen2011europeanb,

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 H Suzanne Cubey and JMH Shaw},

year  = {2011},

date = {2011-01-01},

urldate = {2011-01-01},

volume = {1},

publisher = {Cambridge University Press},

keywords = {Huernia erinacea, Huernia procumbens},

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 = {Duvalia elegans, Huernia barbata, Huernia guttata, Huernia hystrix, Huernia kennedyana, Huernia longituba, Huernia namaquensis, Huernia pendula, Huernia piersii, Huernia procumbens, Huernia quinta, Huernia thuretii, Huerniopsis decipiens, Orbea, Orbea namaquensis, Orbeanthus conjunctus, Orbeanthus hardyi, Piaranthus geminatus, Stapelia divaricata, Stapelia flavopurpurea, Stapelia glanduliflora, Stapelia hirsuta, Tavaresia barklyi},

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 = {Cynanchum perrieri, Echidnopsis cereiformis, Huernia erinacea, Huernia hystrix, Huernia keniensis, Huernia longituba, Huernia macrocarpa, Huernia namaquensis, Huernia pendula, Huernia piersii, Huernia plowesii, Huernia procumbens, Huernia quinta, Huernia rosea, Huernia schneideriana, Orbea wissmannii, Stapelia glanduliflora, Stapelia hirsuta, Tavaresia barklyi},

pubstate = {published},

tppubtype = {book}

}

@book{retief1997plants,

title = {Plants of the northern provinces of South Africa: keys and diagnostic characters.},

author = {Elizabeth Retief and PPJ Herman and others},

year  = {1997},

date = {1997-01-01},

urldate = {1997-01-01},

publisher = {National Botanical Institute},

keywords = {Huernia procumbens},

pubstate = {published},

tppubtype = {book}

}

@book{leach1988revision,

title = {A revision of Huernia R. Br.(Asclepiadaceae)},

author = {LC Leach},

year  = {1988},

date = {1988-01-01},

urldate = {1988-01-01},

number = {4},

publisher = {Aloe, Cactus and Succulent Society of Zimbabwe},

keywords = {Huernia erinacea, Huernia longituba, Huernia procumbens},

pubstate = {published},

tppubtype = {book}

}