Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 75. (Budapest 1983)

Kováts, D.: Distribution of internode lengths of two Lithospermum species (Boraginaceae)

Difference of branches and internode lengths of shoots between Lithospermum purpureo-coeruleum L. and L. arvense L. With the normal flowering shoots the opportunity arises to compare the shoots of the two Lithospermum species. These two species are easily separated and there are some characters in which they differ from each other. Nevertheless, here 1 wish to point out other differences which are probably not so noticable, the branches of flowering shoots and the lengths of internodes. The upper third part of the flowering shoots of Lithospermum purpereo-coeruleum L. Fig. 4. Distribution of internode lengths of a two-years old flowering shoot of Lithospermum arvense L. (curve with one maximum)