one more thing to take note of, aquatic plants in their natural habitat might not look the same once they start growing in your tank
for example, living on a small lake in michigan, I noticed a species of fissidens that looked like massive f. fontanus, however, when I collected it, quarantined it, and it started growing it looked like a tiny dark green stem plant sprouting from the stems of the growth from the lake.
It would help to know what it is though.
a good plant to collect in michigan waterways is coonstail (ceratephyllum demersum)
good luck!