Dryad's Saddle

Overnight, a single dryad’s saddle 
on fallen oak becomes a colony,
the same design at all different scales
from infant mushroom to the full bore rig

soaked by rain that fell in a storm of spring,
underground launched its fruit, elaborated
over eons in light and dark to be this,
that’s acquired a name, the dryad’s saddle 

dryad was the nymph spirit of…