heterophyllus, floribundus, and Drouetii are frequent, the true peltatus and trichophyllus apparently rare. The former grows in the Breamish at Branton, and abundantly in the Weel at an elevation of 500 yards; and the latter we have gathered in a pond near the edge of the cliff a little north of Marsden.
2. R. Baudotii, Godr. Native. English type. Area D. Range 1.
In the salt-water ditches about Seaton Carew (Rev. F. J. A. Hort). No doubt this occurs in other places in brackish water, but it cannot be distinguished from the preceding without close examination. It is abundant in the salt-marshes at the Tees' mouth on the Yorkshire side.
3. R. circinatus, Sibth. Native. English type. Area C. Range 1.
In the lough at Holy Island, where it was first noted by Professor Babington. Swinhoe Links (W. Richardson). Ponds on Alnwick Moor (T.).
4. R. fluitans, Lam. Native. English type. Area C, N, D. Range 1.
Frequent in the Cheviot-land streams, Tweed, Breamish, Wooler Water, Aln, and Coquet. In the North Tyne near Bellingham (Mr. Makepeace !). In the Skerne a little above its junction with the Tees (W. Foggitt).
5. R. hederaceus, L. Native. British type. Area C, N, D. Range 1, 2.
Frequent in watery places, especially in the upland tracts, ascending to 350 yards in Dunsdale, 400 yards in Teesdale, and 300 yards in Allendale, Weardale, and Coquetdale.
6. R. coenosus, Guss. Native. English type. Area N. Range 1.
In the Wansbeck district in a plashy place by the road-side between Hartburn and Scot's Gap Station, 150 yards (B.).
