Dear David, I wonder if the weed you are describing could be Oxalis purpurea. Diana Chapman once said you could make a lawn out of it. It's the one that in Northern California can spread much more than you'd like (besides Oxalis pes-caprae which is yellow and seems to appear out of nowhere.) I think people purposely plant Oxalis purpurea since it is long blooming , comes in many different colors (white, pink, rose, salmon, yellow, violet, cream) and the leaves are attractive if you like shamrock leaves . Oxalis bowiei (note the correct spelling) which is an Eastern Cape species in my experience produces very large bulbs, is tall and fall blooming. Oxalis purpurea has dark gummy bulbs of many sizes and once planted in Mediterranean climates in the ground is difficult to eradicate. I assume as with many Oxalis species that some forms are more invasive than others. The one called 'Grand Duchess' is often for sale. In my garden in Stockton, California it grew in clay soil with very little to no supplemental water and bloomed from October through April, disappeared in the summer and then reappeared in fall. In spite of its invasive qualities, it was very pretty. On the coast in my garden with a lot of trees and not as much sun, it doesn't bloom nearly as well, but still spreads dramatically. Hopefully one day we'll get pictures of bulbs on the Oxalis pages of the wiki as they are often very helpful in identification. If you are going to give it away, it would be nice for people to know for sure what it is they are getting. Mary Sue