In the Lamiaceae, both basic types of glandular and non- glandular trichomes are present with all subtypes e.g. 2-12 cells in multicellular types. The total number varies from one species to the other depending on their function, location and the environmental conditions. Anyhow, 17, 20 and up to 25 types of trichomes were encountered in Salvia, Ziziphora and Teuerium respectively. Thank you.
There is a link between yield, chemical constituent of the aroma, and the density, location on the leaf, development stage, type of trichomes, and all these variables are determined by the ecological conditions. Thank you.