We have lists of bulbs that do well with no fussing, bulbs that won't do well even if you do fuss a bit, and now, how about bulbs that over- extend themselves? Sometimes these are ones that are difficult to get started, like lily- of-the-valley (Convallaria majalis) and Peruvian lily (Alstroemeria aurantiaca). Once they decide to grow, however, they're off! Some produce copious seed and offsets, like Spanish bluebells (currently Hyacinthoides hispanica, I think) and various Muscari. I don't think any bulbs invade natural areas on their own, though Alstroemeria can explode their seedpods and shoot their seeds a short distance. The more usual method of invasion is by tidy gardeners who have been observed trundling wheelbarrow loads of them into the woods. Once there, they spread. So - what bulbs would you warn against in your area? Diane Whitehead