On 2-Feb-09, at 12:11 PM, Jim McKenney wrote: > I've heard that the same thing happens with Arisaema sikokianum. Has > anyone > else observed this? I had Arisaema jacquemontii stay underground for 12 years. When I had a backhoe in to remove a bamboo grove, the tracks drove over the place the arisaema had been, and the next spring it came up and flowered, and has done so every year since. Diane Whitehead Victoria, British Columbia, Canada maritime zone 8, cool Mediterranean climate mild rainy winters, mild dry summers