Hi,
This popped up in my newer planters I made this spring. It's about a
foot high, and has these green spikey pods. One opened the other day.
It has a white flower for about a day, then sprouts another stem.

Any help is appreciated. (I live in the Silicon Valley, CA).
http://pg.photos.yahoo.com/ph/spikec...0eKhFBVkymfaMw

LT