tumbleweed

Any plant which habitually breaks away from its roots once dry, forming a light, rolling mass which is driven by the wind from place to place; as Russian thistle, wild indigo, witch grass, Amaranthus albus, etc.

Describing unwanted silence and inactivity. Often used of a situation when one makes a statement that is ignored or ill-received by one's audience, as the resultant silence is likened to that of a desolate desert with rolling tumbleweeds.

Putting an ad in the local paper that Spock's Beard and Arena are in town will get you a tumbleweed response and some wasted revenue.

“Why do families argue?” may only induce the tumbleweed response. (Could you answer that question out of the blue?)

A tan colour, like that of a tumbleweed.