Very interesting article. I have never seen this plant before. When I was younger a friend had a plant she called a piggyback plant, but it had leaves kind of like a maple tree and the babies came out where the leaf joined at the stem. Very interesting plant and so easy to start new ones. You just waited until the plantlet was big enough and hung by a 'thread', and then you just potted it up.
I'm also familiar with the piggyback plant you described, gardengirl86. In fact, I'd love to have one again as they are pretty & intriguing. I bought mine at a nursery or Home Depot in Salt Lake City years ago when I lived there.
My ex-husband had the plant described in the article & called it Mother-of-thousands but quadrillions would be more accurate! He is known for his complete neglect of plants but he had them springing up everywhere around the mother plant & I & all his friends took home dozens of new plants to start our own colonies. They are fun plants, tho, & our kids found them interesting.
Good to know about the toxic quality, I wasn't familiar with it.