I saw a great deal of a particular bur-reed in the river and it had ears here as elsewhere. I have wondered for a long time what species it is, especially as I have not found it described by any botanist even though it grows abundantly both here and in Småland. It is a Sparganium and its leaves get longer and thinner in deep water; they are 1 to 2 fathoms long and float, convex on the upper side, flat on the lower.