Where does “cipreswolfsmelk” come from?

cipreswolfsmelk (Dutch) comes from Dutch wolfsmelk, from Dutch Wolf, from Middle Dutch wolf, from Old Dutch wulf, from Proto-West Germanic wulf, from Proto-Germanic wulfaz, from Proto-Indo-European wĺ̥kʷos — wolf.

cipreswolfsmelk (Dutch): cypress spurge (Euphorbia cyparissias)

Definitions

cypress spurge (Euphorbia cyparissias)

Ancestry of “cipreswolfsmelk”, step by step

cipreswolfsmelk traces back through two separate lines of ancestry.

via Dutch wolfsmelk

Step	Language	Word	Meaning
1	Dutch	wolfsmelk	spurge (Euphorbia L.)
2	Dutch	Wolf	Lupus
3	Middle Dutch	wolf	wolf, grey wolf
4	Old Dutch	wulf	wolf
5	Proto-West Germanic	wulf	wolf
6	Proto-Germanic	wulfaz	wolf
7	Proto-Indo-European	wĺ̥kʷos	wolf

via Dutch cipres

Step	Language	Word	Meaning
1	Dutch	cipres	cypress
2	Middle Dutch	cypresse	—
3	Old French	cipres	—
4	Latin	cypressus	—
5	Latin	cupressus	cypress
6	Ancient Greek	κυπάρισσος	cypress; its wood, used as timber

Every word from Proto-Indo-European wĺ̥kʷos →