VARIABILITY OF SOME MORPHOLOGICAL CHARACTERISTICS OF Lamium purpureum L. WEED

Rezumat

Among the species of weeds with early emergence in spring is Lamium purpureum L. The plant is observed by its appearance in the form of small hearths, with relatively high densities, in addition to and in the areas cultivated with wheat. On the one hand, there was an obvious spread in agricultural areas, and on the other hand, a certain culinary and medicinal interest increased. Its spread occurs through the relatively high number of seeds it produces and their persistence in the soil. Morphological characters have shown a continuous evolution, depending on the ecotype existing at a given time. Thus, the average plant measured 13 cm in height and weighed 0.12 g of dry matter. One plant had on average 35 top-like fruit formations, and the number of nuts on a plant was 28. The nuts were 1.8 mm long and 0.8 mm thick. and the mass of one thousand walnuts was at the level of the whole experiment of 0.57 g. Significant positive correlations were obtained between the height of the plants with their weight, with the number of fruit formations and with the number of seeds/ nuts. Negative correlations were between the length of the nuts and the other characters. The determinations performed showed that the weed also adapted to the current climatic conditions in the agricultural field, with the increase of the fruiting of the plants.