MYRIOPHYLLUM 221 



1. Isis. Beyond ye turnpikes on Botley Causeway, Banks. (The 



locality may have been actually in Oxford.) Buckland Lake, 

 BosiceU, in Fl. Oxf. Near Eynsham, Mrs. Westwood. NearWytham. 



2. Ock. Ditches about Oxford, Eufford, in Purt. Midi. Fl. Is ear 



Marcham, Walker. 



3. Pang. Pangbourn, Keicboidd, in Britt. Contr. Bradfield. 



4. Kennet. Kintbury, Reeks, in Britt. Contr. 



5. Lioddon. Broad ditches, Sonning meadows, Tufnail. Maidenhead. 

 Var, FLUviATiLis [Web.] in Wigg. Prim. Fl. Holsat. i (i78o\ the 



submerged form, with drawn-out stem and with longer and moi-e 

 pellucid leaves, is probably only a state, not a true variety ; it occurs 

 in Buckland Lake. 



Hip2niris occurs in all the bordering counties. 



MYRIOPHYLLUM, Linn. Gen. n. 945 (Vaill. A. G. 1719 . 

 M. verticillatum, Linn. Sp. PI. 992 (1753). Water Milfoil. 



Top. Bot. 167. Syme, E. B. iv. 31, t. 513. Nyman, 250. Fl. Oxf. 120. 

 Native. Lacustral. Rivers, streams, ponds, and ornamental waters. 

 Locally common, and widely distributed in all our larger streams 

 and large sheets of ornamental water. P. June-August. 

 First record. Ponds and ditches near Eton, Mr. Gotobed, in Bot. Guide, 

 1805. Ditches near Bray [J. Woods], Winch, add. in New Bot. 

 Guide, 1835. 

 Var. PECTiNATUM (DC, Fl. Fr. v. 529 (1815), as a species), Koch, Syn.' 

 Fl. Germ. 244 (i837\ This variety, which appears to be a state rather 

 due to growth in shallow water, which during the summer becomes 

 much diminished in depth so that the plant is to a considerable extent 

 terrestrial, has been noticed in White Knight's Lake, Tufnail. Buck- 

 land Lake, near Wytham in the dry summer of 1894, at Southcote, 

 near Wargrave, &c. 



The var. intermedium, Koch, 1. c, is also found. 

 M. vetiicillatum occurs in all the bordering counties. 



M. spicatum, Linn. Sp. PI. 992 (1753). Spiked Water Milfoil. 



Top. Bot. 168. Syme, E. B. iv. 32, t. 514. Nyman, 250. Fl. Oxf. 119. 

 Native. Lacustral. Ditches, ponds, streams. Locally common. P. 



June-September. 

 First record. M. spicatum, Mr. G. G. Mill, in Phijt. i. 987, 1843. See 



also the author in Rep. Bot. Rec. Club, 1880. 



1. Isis. Buckland, Boswell. Buscot. Ufiington. 



2. Ock. Ditches near the Devil's Backbone, 1844, Baxter MS. South 



Hinksey, the author, 1. c. Ferry Hinksey. Wantage. Abing- 

 don. Radley. Ponds by the side of the railway near Steventon. 

 Didcot. 



3. Pang. Near Moulsford. Bi-adfield. 



