Phyteuma (P) nigrum, the black rampion, is a relatively rare species of plant in the family Campanulaceae.

The basal leaves usually only have a shallow, heart-shaped blade base with a notched to sawn leaf edge.

The lower stem leaves are ovate and narrowed at the base, the middle and upper ones only have a reduced blade.

[1] Phyteuma nigrum is primarily located in northern Europe, encompassing all of Scandinavia, that is, Norway, Denmark, Sweden and Finland, with some populations also growing in Switzerland.

[2] With shared flower morphologies, that is, the structure of the individual plant, it is inferred that Phyteuma is closely linked with Physoplexis.

[3] Using molecular data to identify evolutionary relationships, as opposed to morphology, contributes to strengthening the existing phylogenetic framework for Phyteuma.

By comparing with taxa in the same areas, the introduction of P. nigrum to these northern sites can be dated from 1941 to 1944 as Germany introduced these "alien" plants (polemochores).

This introduction contributed to expanding the geographical range of P. nigrum, with Sør-Varanger now marking the northernmost location for the genus.

However, pollen limitation is a contributing factor for a lack of fertility within P. nigrum as well as other plants with relatively small populations such as Phyteyma spicatum.