As I mentioned previously I planted several "Betta Bulbs" in my tanks a few weeks ago. While I haven't seen any signs of life in either my main tank or the Macropodus tank, I noticed something new in my plant tank about a week ago. Today I noticed a flower spike that had broken the surface of the water, and this evening I noticed a second plant.
One of my first thoughts was that while the plant could easily be an Aponogeton, I had my doubts as to whether it was Aponogeton ulvaceus (as the packaging claimed) - which is probably a good thing. Aponogeton ulvaceus tends to be a very large plant with broad, wavy leaves that presumably resemble the alga Ulva. One online description says the leaves are 3-10 cm broad. These plants appear to have far narrower leaves - at most a centimetre broad - but that might change as the plants get bigger. Perhaps the flowers will give me a better sense of what species I actually have, although there is mention of widespread hybrid origin of cultivated plants.