Here is one (amongst 2 others) of my bulbs that sprouted. The package contained 5 and 3 sprouted. Its been about 2 weeks now and one looks like this now. As you can see it has already grown the height of my 10 gal. So if it does sprout in a bowl I think it will soon grow too big. This plant grows FAST. I see a noticeable difference in size and thickness of the leaves everyday.
Plants are good because they absorb ammonia (toxic fish poo byproduct) and keep the water clean. If you have a VERY heavily planted tank (lets say a 10 gal) with a low bio-load (lets say it only has a betta) then the plants will act as filters and there will be no need for frequent water changes. However, this will not happen in a bowl as a bowl is too small.