Flora of North America
Diane Whitehead (Thu, 25 Mar 2010 22:49:11 PDT)

I can't think of any bulbs that do it, but I'm pretty sure there are
some seashore plants that manage to grow from here all the way to
South America's tip. I don't know whether there are gaps, but it
would be interesting to take a trip and find out.

Diane Whitehead
Victoria, B.C., Canada