I found this weed on my lawn under melting snow cover. It has toothed leaves hugging the stems; tiny white flowers in bunches; older and rounder leaves surrounding the flower bunches:
Does anyone know what it is? Thank you!
Answered: the Field Penny-Cress, Thlaspi arvense (http://www.habitas.org.uk/flora/species.asp?item=2841). In the mustard family, easily identifiable (once you know that the little round green "leaves" are in fact seed pods); but in the Netherlands varieties, as they grow much earlier in spring. Bonus: they're edibles, with a tame wasabi-like aftertaste.