Pelargonium echinatum
Synonym: Cortusina echinatum
Taxonomy
Pelargonium inquinans is a member of the Subgenus Pelargonium cortusina DC.
Botany
Erect to semi-decumbent subshrubs with subsucculent to succulent, rarely woody stems. Leaves simple, reniform, ovate or cordate, margins crenate or crenulate. Inflorescence is a pseudoumbel. Petals white, pink, mauve to purple, markings on all five or on anterior 3. Hypanthium 2-6x longer than sepals, base slightly thickened. Fertile stamens 6-7. Basic chromosome number, x = 11. Further characters, on which the species are separated into a section are pollen morphology and phenolic composition. P. christophoranum and P. vanderwaltii are added to the section here.
Subgenus Pelargonium cortusina
aculeatum Steud. syn. echinatum (Thunb.) Curt.
amabile Dinter syn. sibthorpiifolium Harv.
christophoranum Verdcourt
cortusifolium L'Herit.
crassicaule L'Herit.
desertorum Vorster
eberlanzii Dinter syn. sibthorpiifolium Harv.
echinatum (Thunb.) Curt.
graniticum Knuth syn. sibthorpiifolium Harv.
hamatum Jacq. syn. echinatum (Thunb.) Curt.
hemisphericum Clifford syn. crassicaule L'Herit.
magenteum J. J. A. van der Walt
mamillaricaule Steud. syn. crassicaule L'Herit.
mirabile Dinter syn. crassicaule L'Herit.
mirandus Clifton syn. crassicaule L'Herit.
primulinum Sweet syn. crassicaule L'Herit.
rhodanthum Schlechter syn. magenteum J. J. A. van der Walt
sericeum Salisb. syn. crassicaule L'Herit.
sibthorpiifolium Harv.
vanderwaltii van Jaarsv.
velutinum L'Herit. syn. sibthorpiifolium Harv.
xerophyton Schltr. ex Knuth
See Pl. Syst. Evol. 183 (1992) 83-97 for details.