676 



the highest parts of Caen Wood, between Hampstead and High gate ;' 

 likewise, that he had found it, a year or two previously, under ' fir 

 trees in Apsley Wood, Bedfordshire.' The only doubt which arises 

 in respect to these two last-mentioned counties, is, that Mr. Edwards 

 may possibly have mistaken some other plant for the Convallaria bi- 

 folia, and more particularly as he writes on the recollection of several 

 years back." — p. 465. 



Finally, Anacharis alsinastrum, the Udora verticillata of the Phy- 

 tologist, and first made known to the botanical world of this country 

 through the medium of its pages ; and the almost simultaneous dis- 

 covery of which in different and distant localities is remarkably inte- 

 resting, affords us a good opportunity of showing how Mr. Watson 

 has brought down his information to the last hour of going to press : 

 in this particular, and apart from all its higher merits, the ' Cybele 

 Britannica ' must ever be considered a model publication : it would 

 be difficult indeed to point out a trustworthy record of the occurrence 

 of a rare species in Britain that the author has overlooked or failed to 

 cite. 



" 1108.* Anacharis Alsinastrum, Bab. 



" Area * 2 * 4 5 * * 8 ***** 14, 



" South limit in Hants, Northampton, Stafford. 



" North limit in Edinburgh, Berwick. 



"Estimate of provinces — ? Estimate of counties — ? 



" Latitude 52 (50) — 56. Uncertain type of distribution. 



"Agrarian region. Inferagrarian — Midagrarian zones. 



" Descends to the coast level, or nearly so. 



"Ascends to 100 yards, less or more, in East Lowlands. 



" Range of mean annual temperature 49 — 47. 



"Denizen. Lacustral. First announced as a British plant about 

 the close of 1847, under name of Udora verticillata. Doubts were 

 soon suggested respecting its nativity in Britain, from the circum- 

 stance of its being shortly afterwards observed in ponds, to which it 

 might possibly, and even not improbably, have been introduced from 

 America. Mr. Borrer found it in a pond in Leigh Park, near Havant, 

 in the south-east of Hants, which is the most distrusted locality for it 

 in England. Mr. Kirk (Phytol. iii. 389) observed it abundantly in 

 the reservoirs at Watford Locks, ' on the same line of canal as Fox- 

 ton Locks,' in Leicestershire. The reservoirs at Foxton Locks, near 



