It is in the subgenus pelargonium along with Pelargonium crispum and Pelargonium tomentosum. Note&colon; Most Angel Pelargoniums are crosses between a regal pelargonium and "Pelargonium crispum". It is known by several common names including ivy-leaved pelargonium and cascading geranium. The plant appears to be a cultivar of "Pelargonium graveolens". There are quite a few cultivars and hybrids of "Pelargonium odoratissimum". There are many cultivars of "Pelargonium quercifolium" and a few hybrids. Pelargonium sidoides is a plant native to South Africa. Nonanoic acid occurs naturally as esters in the oil of pelargonium. These secretions are obtained from different species, such as "Anthirrinum", "Crepis", and "Pelargonium". It is believed that his name Itri comes from the word itir, which means pelargonium. Tentative evidence supports honey and pelargonium to help with symptoms. "Pelargonium peltatum" has been assigned to the section "Ciconium". "Pelargonium zonale" was collected by Henrik Bernard Oldenland in 1689 at Meiringspoort Pas.