Pieces of stems, leaves, flowers and buds passing through a sieve with holes 2 mm in size. When viewed under a magnifying glass or stereo microscope visible pieces of green leaves, gray-green, greenish-brown color; petioles, stems, greyish-green or light green color, is rare - gray-green or brownish-yellow calyx and white corolla.Pieces of stems are often split in longitudinal section and have a yellowish-white spongy core. Numerous dark brown shiny rounded formations (essential oil glands), whitish hairs, especially numerous on pieces of young leaves, are noticeable on fragments of leaf blades.
The smell is weak, fragrant. The taste of the water extract is slightly bitter.