Research aimed at the evaluation and selection of biological material, genetically valuable in several species of perennial medicinal herbs. Advanced research is being identified varieties to be studied. The method by which the WSD (Weight of 1000 seeds) is then working in the national seed quality control (INCS). We determined WTS (Weight of 1000 seeds) to 50 varieties of 38 species from 22 sorts. Counting has been done with an electronic seed counter type Sadkiewicz. The WTS was obtained by multiplying with 10 the arithmetic mean of the 8 repetitions, if the repetition was not a difference of more than 6% of the WTS – if it exceeded 25 g - or 10% if the WTS was less than 25 g. Between species and even varieties there is a great variability regarding the WTS of seeds. So the largest WTS occured inLupinus pollyphyllus – L. Bacău (242.5 g), and the smallest in the species Digitalis purpurea - Dp–20/06 (1.6 g). In studies Echinacea purpurea dominated with 10 varieties. The average WTS of these was 27.2 g, with amplitude of ±12.7 g. Some varieties of Echinacea purpurea, the largest MMB occurred in E. purpurea2 Ep 1 (39.9 g) and lowest in E. purpurea U-25 elite 25 (14.4 g). Hyssopus officinalis species in the 3 varieties have a large variation of WSD, between 13.9 and 63.0 g. WSD seed size and gives us clues on how to determine their germinaţiei (TP, BP and S) and to determine their depth of sowing. The novelty is high. From our information has never been such a study in our country. In our research we limited to a few species of which we had biological material. The results have practical implications for promoting varieties with higher potential production and quality. The work is original and important field of medicinal and aromatic plants.

weight of 1000 seeds; perennial medicinal herbs; seed counter; Echinacea purpurea; yssopus officinalis

Presentation: oral