Two new species of Oxalis (Oxalidaceae) from the Greater Cape Floristic Region Author Suda, Jan Department of Botany, Faculty of Science, Charles University in Prague, Benátská 2, Prague, CZ- 128 01, Czech Republic & Institute of Botany, Academy of Sciences of the Czech Republic, Průhonice 1, CZ- 252 43, Czech Republic Author Krejčíková, Jana Department of Botany, Faculty of Science, Charles University in Prague, Benátská 2, Prague, CZ- 128 01, Czech Republic & Institute of Botany, Academy of Sciences of the Czech Republic, Průhonice 1, CZ- 252 43, Czech Republic Author Sudová, Radka Institute of Botany, Academy of Sciences of the Czech Republic, Průhonice 1, CZ- 252 43, Czech Republic Author Oberlander, Kenneth C. Institute of Botany, Academy of Sciences of the Czech Republic, Průhonice 1, CZ- 252 43, Czech Republic & Department of Conservation Ecology and Entomology, Stellenbosch University, Private Bag X 1, Matieland, 7602, South Africa Department of Botany and Zoology, Stellenbosch University, Private Bag X 1, Matieland, 7602, South Africa Author Dreyer, Léanne L. E-mail ld @ sun. ac. za text Phytotaxa 2013 2013-08-15 124 1 13 24 http://dx.doi.org/10.11646/phytotaxa.124.1.2 journal article 10.11646/phytotaxa.124.1.2 1179-3163 5085054 Key to the multifoliolate species of Oxalis from the Bokkeveld Plateau, South Africa 1. Well-developed above-ground stem (exserted at least 12 mm above ground) .............................................. O. zeyheri - Stemless or with very short above-ground stem (less than 12 mm above ground) ...................................................... 2 2. Leaflets glabrous.......................................................................................................................................................... 3 - Leaflets pubescent to hirsute ........................................................................................................................................ 5 3. Plant semi-succulent, leaflets oblong to linear-oblong, petiole fleshy to winged, sepals callose .................... O. flava - Plant wiry to delicate, leaflets linear, conduplicate or U-shaped in cross-section, petioles filiform, sepals ecallose .... ..................................................................................................................................................................................... 4 4. Petiole base and apex distinctly swollen, petals with two swollen basal papillate swellings, filaments toothed........... .................................................................................................................................................................... O. pulvinata - Petiole base and apex slightly swollen, petals non-papillate, filaments edentate.................................... O. filifoliolata 5. Petioles sparsely pilose, grooved, leaflets with two apical calli, sepals ecallose ...................................... O. saltusbelli - Petioles densely pilose, terete, leaflets with multiple abaxial calli, sepals distinctly callose, recurved ...... O. carolina