Ee kala soocida cilmiga ahaan, ereyga incertae sedis (la soo gaabiyey inc. sed.) waxa loo isticmaalaa cashuurta marka xidhiidhka ballaadhan uu la leeyahay cashuuraha kale aan la garanayn. Qofkii ugu horreeyay ee ereygan u adeegsaday botany wuxuu u badan yahay Antoine-Laurent de Jussieu. Buuggiisa Genera Plantarum ee 1789 waxa uu ku taxay yar oo plantae incertae sedis ah.