>>508907470
well, which ones?
see: >>508906249
further, the pretty pictures you see are just a tiny subset; in reality, the gaps between neurons are packed with other cell bodies, neurites, and glia
picrel (b) shows how densely your cortex is packed
if anything, dendrites look more like trees, hence the name (dendros is the greek word for tree)
you only see clustering like in OPs pic in early development, maybe in imaging of neuroblasts