It can be found in Prunus domestica (plum tree), in the wood of Salix caprea (goat willow) and in the Brazilian green propolis.
Less common trees include downy birch, goat willow, aspen and rowan.
An alternative theory, considered less likely by Snoj, is that Mačkovec is derived from the Slovene common noun mačkovec 'goat willow' or 'restharrow'.
In addition to birch trees include aspen, Scots pine, Juniperus communis, grey alder, rowan, goat willow and bird cherry.
Montane zone: beech, birch, aspen, English oak, sycamore maple, goat willow, then fir and spruce.
The few exceptions include the goat willow (Salix caprea) and peachleaf willow (Salix amygdaloides).
Whenever I take hold of a woman I feel as though my feet are slithering on tufted grass and goat willow.
God walking up and down between buckthorn and sallow and goat willow.