Taxonomie en nomenclatuur van de koebraam

The author discusses several aspects of Rubus inermis Pourr. (= R. ulmifolius Schott). The discovery of an earlier name made it necessary to change the name of this well known and widespread species. R. inermis is easely recognised by: turio thick bluish pruinose, glabrous or with stellate hairs; leaflets small, coriaceous, white tomentose beneath, usually without longer hairs; inflorescence cylindrical, leafless; petals broad, usually pink; stamens only a little longer than the styles. Diploid (2n=14). It prefers sunny hills, roadsides and hedgerows on a substratum rich in lime and has a Mediterranean-atlantic distribution. Fig. 1 gives several forms of the top leaflet, fig. 2 shows the distribution in the Netherlands.