water plantain: marsh plant having clusters of small white or pinkish flowers and broad pointed or rounded leaves
marsh plant: a semiaquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath
tractarian: a follower of Tractarianism and supporter of the Oxford movement (which was expounded in pamphlets called `Tracts for the Times')